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Abstract PDF Editorial by Detsky, A. S. Letters Add to Personal Archive Add to Citation Manager Notify a Friend E-mail When Cited Related Article by Roizen, M. F. PubMed Citation

ABSTRACT

Background The gain in life expectancy is an important measure of the effectiveness of medical interventions, but its interpretation requires that it be placed in context. The interpretation of gains in life expectancy is particularly problematic for preventive interventions, for which the gains are often just weeks or even days when averaged across the entire target population.

Methods We tabulated the gains in life expectancy from a variety of medical interventions as reported in 83 published sources and categorized them according to target population and disease. We considered prevention in populations at average risk for particular diseases, prevention in populations at elevated risk, and treatments in populations with established disease.

Results The gains in life expectancy from preventive interventions in populations at average risk ranged from less than one month to slightly more than one year per person receiving the intervention, but the gains were as high as five years or more if the prevention was targeted at persons at especially high risk. The gains in life expectancy from treatments of established disease ranged from several months (for coronary thrombolysis and revascularization to treat heart disease) to as long as nine years (for chemotherapy to treat advanced testicular cancer).

Conclusions A gain in life expectancy from a medical intervention can be categorized as large or small by comparing it with gains from other interventions aimed at the same target population. A gain in life expectancy of a month from a preventive intervention targeted at populations at average risk and a gain of a year from a preventive intervention targeted at populations at elevated risk can both be considered large. The framework we developed for standardizing gains in life expectancy can be used in the interpretation of data on the outcomes of interventions.

It is especially difficult to establish a perspective on the gains in life expectancy from preventive interventions, because frequently only a small fraction of the recipients of the intervention actually realize any benefit, driving down the average gain. Thus, strategies aimed at preventing life-threatening diseases may appear ineffective alongside treatments for those who are already ill.

In this article, we propose that a gain in life expectancy from a medical intervention can be categorized as large or small by comparing it with gains from others of its type — that is, with other interventions aimed at the same target population. We present a comprehensive set of data on published gains in life expectancy from medical interventions, stratified according to the target population. This work is a contribution to the developing technology of calibrating and standardizing the effectiveness of medical interventions, and it can help inform a clinician's intuition or a policy maker's judgment about the importance of a life-extending preventive service or treatment.

In the field of public health, the effectiveness of preventive services is usually measured in terms of the number of cases prevented or the number of lives saved. Thus, the effectiveness of aggressive screening for colorectal cancer has been estimated to be approximately 2000 cases prevented per 100,000 persons screened.¹ This type of measurement, however, does not tell us how premature the avoided deaths would have been. For example, preventing a teenager's death from an automobile accident would be regarded differently from preventing a death from hospital-acquired pneumonia in a patient with end-stage cardiac disease.

By contrast, the effectiveness of medical treatments is often measured in terms of the increase in the proportion of people alive at fixed points in time — typically, changes in one-, two-, or five-year survival. Such changes can be given in relative or absolute form, which often leads to confusion. For example, a base-line mortality rate of 20 percent is reduced to 19 percent by a 5 percent reduction in relative risk, but it is reduced to 15 percent by a 5 percent reduction in absolute risk. Reporting the effectiveness of a treatment as a relative improvement is misleading, because the base-line death rate is ignored, but reporting improvements in survival rates in absolute terms still leaves some questions unanswered. Are the survivors all destined to live "normal" lives? What is the justification for focusing on a particular interval after the intervention (e.g., 5 years), given that two populations with the same chances of surviving for 5 years may, by virtue of risk factors or coexisting illnesses, have very different probabilities of surviving the first 12 months or the following 20 years? The same questions are unanswered by another common measure, the increase in the median survival time (or half-life) of the cohort, which is often used for reporting the results of clinical trials of treatments for cancer and other progressive diseases.

An argument for a new measurement — the number of people who must be treated in order to prevent one expected death or, more generally, to produce one successful outcome — has been made on the grounds that this would give the clinician an idea of how to apportion effort.² This measurement is inversely proportional to the number of lives saved and, again, does not tell us how long the survivors will live.

A much richer understanding of lifesaving effectiveness comes from comparing the full survival curves of treatment and control groups. The great advantage of the gain in life expectancy as a measure of outcome is that it is a direct measure of the shift in the survival curve caused by the intervention. Mathematically, the gain in life expectancy is the area between the two survival curves (Figure 1). In contrast, each of the two traditional methods of measuring the effectiveness of treatments captures only one dimension of the shift in the survival curve and may even be misleading if the survival curves for the treatment and control groups cross.

View larger version (4K): [in this window] [in a new window]   Figure 1. Hypothetical Survival Curves for a Treatment Group and a Control Group. The life expectancy of an individual person corresponds to the area under the relevant survival czzzurve. Thus, the gain in life expectancy from the intervention is represented by the area between the two curves. Adapted from Naimark et al.3

 
There are two challenges associated with using the gain in life expectancy — one for the analyst and one for the user of the analysis. First, survival data are almost always censored, because some members of the cohort are still alive at the end of the clinical trial or observational study. A model must be constructed to extrapolate the survival curves beyond the end of the study, and the estimate of the gain in life expectancy may be very sensitive to the choice of model.

Second, because the gain in life expectancy is a two-dimensional measure of effectiveness, it is cognitively difficult to develop an intuitive feel for what constitutes a large or a small gain. A gain is usually thought of as a certain gain at the end of life rather than as a probabilistic gain throughout the remainder of life.³ (Often, most of the gain in life expectancy — the upward shift of the survival curve — occurs soon after the intervention.) This cognitive distortion is greater for preventive interventions than for treatments, because the base-line life expectancy is generally greater.

Methods

Hypotheses

We began with some hypotheses about how the magnitudes of the gains in life expectancy might vary according to the characteristics of the target populations. Of the characteristics currently recorded, age, sex, and race are the primary determinants of life expectancy in the general population. In populations with risk factors for particular diseases and in populations with established diseases, these demographic factors become less important as the relative risk rises or the clinical status worsens.

The prevalence and incidence rates of the disease in the target population set upper bounds on the gain in life expectancy from a preventive intervention. Thus, a screening intervention can never lead to a large gain in life expectancy if the disease has a low prevalence, and a vaccination program can offer only a limited gain if the disease has a low incidence. Conversely, curative or palliative interventions are targeted at populations in which everyone already has the disease, so there is the potential for large gains. However, the same factor that makes the potential gain large — a poor prognosis — will often drive down the actual gain if survivors have other risks that reduce the potential gain in longevity.

Specifically, we might expect to find the following hypotheses to be true. First, the gains for older populations will be smaller than those for younger populations for several reasons: disease-specific mortality and competing risks of death increase with age, fatal complications from treatment are more likely, and there are fewer years that can be gained by averting a death.⁴ Second, the gains for women will be a little larger than those for men if the disease is not sex-specific in either occurrence or severity, because women have lower age-specific mortality rates than men. Third, if only a few people actually benefit from the intervention (e.g., because of a low incidence of disease in the case of primary prevention or a low prevalence of disease in the case of screening), the average predicted gain will necessarily be small, even if the lives of those few people are extended by many years. And fourth, the more advanced the disease in the target population, the poorer the prognosis for the population and the greater the potential gain from treatment, but that gain will be correspondingly harder to realize. These hypotheses cannot be tested formally with our data, since we are limited to a sample of interventions for which the gains in life expectancy have been estimated in published papers. Nevertheless, they explain some of the variation in gains seen in our results.

Collection of Data

For this study, the gains in life expectancy from various medical interventions were taken directly from or were calculated from data in 83 published sources, many of which were found through a Medline search. Sources were selected if they reported gains in life expectancy or the data required for a simple calculation of gains and if they were published in English. The quality of the analysis (other than as indicated by the publication of the report in a peer-reviewed journal) was not a criterion, since our aim was to gather information on gains in life expectancy for as wide a variety of interventions as possible. We made no attempt to select the "best" article when we found more than one on the same intervention, because comparing analyses of the same or similar interventions can be valuable. We rejected some sources because the technology of the intervention has changed substantially or is no longer used.

It is rare for the primary purpose of a study to be the calculation of gains in life expectancy. The majority of the articles that yielded the information we sought were either decision analyses⁵ or cost-effectiveness analyses.⁶ Many of these analyses were appended to clinical trials or epidemiologic investigations to quantify the magnitude of a clinical benefit. Many analyses of cost effectiveness could not be used as sources, because the authors had adjusted the reported gains in life expectancy for health-related quality of life or had discounted them to present value (or both), without reporting the corresponding unadjusted and undiscounted values, as is currently recommended.⁷

Some important interventions do not appear in our study. Investigators examine interventions that are salient because they are new, because they are controversial, or both. For instance, screening for and treatment of early-stage breast cancer are currently under intense scrutiny because of the controversy over the optimal age at which women should begin periodic mammographic screening. Thus, breast cancer is prominent in our results. We were able to find the gain in life expectancy from a new drug for survivors of stroke — ticlopidine — but not the gain from the standard drug, aspirin. Our results include some interventions that are used commonly and some that are seldom used; those presented here should not be interpreted as reflecting the full range of life-extending interventions.

Some authors modeled the gains in life expectancy for the typical patient, whereas others modeled the gains for many target populations, varying age, sex, risk factors, clinical status, and occasionally, race in their models. We do not present all these subgroup analyses; rather, we report the gains in life expectancy for selected target subpopulations and indicate that the results of other analyses are available in the cited articles.

Some authors reported gains in life expectancy as point estimates, whereas others reported ranges. These ranges are sometimes formal confidence intervals or credible intervals and sometimes reflect the effect of varying a key parameter or modeling assumption in a sensitivity analysis.

We converted all the gains in life expectancy to months. The number of significant figures and decimal places varies somewhat. In cases in which the gains were very small, they are necessarily reported to as many as three decimal places, but this does not imply any judgment of greater precision. For several interventions, we calculated the gains in life expectancy from data provided in the primary sources. Generally, these calculations involved a straightforward conversion of lives saved to life-years saved per person, with life tables used to estimate life expectancy.

Owing to space constraints, the tables we present here show gains in life expectancy from only 31 of the 83 published sources. The complete set of gains, as well as the details of our methods of calculating them from the primary-source data, is available on the following Web site: www.hsph.harvard.edu/organizations/hcra/peemt.html.

Results

Since we propose that a gain in life expectancy from a medical intervention can be categorized as large or small by comparing it with gains from other interventions aimed at the same target population, we present our results in tables organized primarily according to target population.

Table 1 and Table 2 show data on preventive strategies, and Table 3 shows data on treatments. It is impossible to draw a clear distinction between prevention and treatment. For instance, prophylaxis against Pneumocystis carinii pneumonia in patients infected with the human immunodeficiency virus is, strictly speaking, a preventive strategy, but we chose to categorize it as a treatment.

View this table: [in this window] [in a new window]   Table 1. Prevention in Populations at Average Risk.

 

View this table: [in this window] [in a new window]   Table 2. Prevention in Populations at Elevated Risk.

 

View this table: [in this window] [in a new window]   Table 3. Treatments of Persons with Established Disease.

 
In cases in which the gains in life expectancy estimated for men and women are different, both are presented. If the gain is not sex-specific, it is centered between the columns for male and female subjects in the tables.

The age of the target population is the age from which the gain in life expectancy is estimated. For instance, in Table 1, the three-month gain associated with Pap smears is the gain that can be expected for 20-year-old women who embark on a lifelong screening program; a woman who begins screening for cervical cancer at 50 years of age will increase her life expectancy by less than three months.¹²

Table 1 shows the gains in life expectancy associated with prevention in populations at average risk. In these populations, the incidence and prevalence of disease matter enormously. For example, a program of physical exercise begun at the age of 35 years increases life expectancy by 6.2 months,⁸ and complete cessation of smoking at the age of 35 increases life expectancy by 9 months,⁹ but a decade of biennial mammography begun at the age of 50 increases life expectancy by only 0.8 month.¹¹ Even the highly effective childhood vaccines against measles, rubella, and pertussis offer gains in life expectancy of only approximately 0.1 month each.^13,14 For the preventive interventions targeted at people at average risk, it is evident from Table 1 that a gain on the order of only a month can be considered large.

Table 2 shows the gains in life expectancy associated with prevention in populations at elevated risk. In some cases, the elevated risk is only slightly greater than the average risk for the disease; in other cases, it is much greater. Many of the interventions shown in this table yield gains on the order of a year. For example, 35-year-old male smokers who quit smoking gain 28 months of life expectancy,⁹ and 50-year-old women at elevated risk for coronary artery disease gain 7 to 19 months from hormone-replacement therapy.¹⁰ At the other extreme, the gain from preoperative autologous blood donation is very small — about two hours.¹⁹

Table 3 shows the gains in life expectancy associated with treatment in target populations with established cardiovascular disease, cancer, or other diseases. The gains from treatment of coronary artery disease increase with the severity of the disease, but few exceed a year. Most of the cancer treatments yield gains that are much smaller than those from the three aggressive preventive interventions shown in Table 2.^16,17 However, there are gains of several years associated with a number of the treatments shown in Table 3, such as implantable defibrillators for survivors of cardiac arrest (36 to 46 months),²⁴ bone marrow transplantation for relapsed non-Hodgkin's lymphoma (72 months),³³ and chemotherapy for testicular cancer (107 months).³²

Discussion

Those who provide and pay for medical care make decisions about preventive strategies and treatments in an environment in which quantitative measures of outcome are increasingly common. By collecting and categorizing the gains in life expectancy from a wide variety of medical interventions, we have developed benchmarks for the size of the gain that can be expected in various populations, thus providing a valuable resource for those who set clinical-practice guidelines or make intervention-specific decisions about insurance coverage. Moreover, the organization of gains in life expectancy according to target population, disease, and type of intervention has established a framework that can be used for the presentation of other standardized data on outcomes.

Virtually all life-extending medical care has both positive and negative effects on health-related quality of life, and sometimes reduction in morbidity is the main outcome of the intervention, with the life-saving benefit as a bonus. Information on gains in quality-adjusted life expectancy is available from many medical cost-effectiveness and decision analyses, and could be presented systematically alongside information on gains in life expectancy. Similarly, since many of the data on gains in life expectancy and quality-adjusted life expectancy are available from cost-effectiveness analyses, cost-effectiveness ratios — measured in both dollars per year and dollars per quality-adjusted year — could be added to our tables. Such efforts are fraught with difficulties, however, and until investigators follow reasonably uniform practices when conducting cost-effectiveness analyses, the results will be of limited value.

Although the gain in life expectancy is a richer measure of the effectiveness of "lifesaving" interventions than those used traditionally, it should not be used simplistically in clinical decision making. The reported gain in life expectancy is averaged across the target population receiving the intervention and offers no information about the distribution of the gains in life expectancy actually realized by particular patients. The mean gain may reflect a small gain for most members of a population but a very large gain for a few members who might have died prematurely without the intervention. For example, consider the triennial cervical-cancer screening program¹² shown in Table 1. The mean gain in life expectancy from screening is about 3 months for the target population, but the women whose cancers are detected preclinically actually gain an average of 25 years. Similarly, the average gains from vaccination of infants are all very small, but those whose deaths are averted gain virtually their whole lifetimes. Viewed this way, the gains of months in life expectancy from preventive interventions will often be equivalent to gains of years from medical treatments.

At the other extreme, those making decisions about the allocation of medical resources may be interested in the overall effect of interventions on the life expectancy of the whole population. A highly effective intervention will have a very small effect on the life expectancy of the population if the disease is rare. For example, the gain in life expectancy from chemotherapy for testicular cancer is about nine years for those receiving the intervention (Table 3).³² However, because this disease is so rare, the gain from making this treatment available to the man at average risk is about one hour. This gain is very small in comparison with the population-wide gains of months from the preventive interventions for coronary heart disease⁹ shown in Table 1.

The gains in life expectancy from medical interventions intended to prevent disease seem small because of the effect of averaging across a population, most members of which would never contract the disease. Our analysis establishes that a gain of a month from a preventive strategy aimed at the general population signals an important intervention.

Supported in part by an unrestricted grant from Schering-Plough.

We are indebted to David J. Cohen, M.D., Kenneth L. Freedberg, M.D., John D. Graham, Ph.D., William Hogan, Ph.D., Maria G.M. Hunink, M.D., Ph.D., Karen M. Kuntz, Sc.D., Peter J. Neumann, Sc.D., Alvin R. Tarlov, M.D., and Jane C. Weeks, M.D., for their advice.

Source Information

From the Harvard School of Public Health, Boston.

Address reprint requests to Dr. Weinstein at the Department of Health Policy and Management, Harvard School of Public Health, 718 Huntington Ave., Boston, MA 02115.

References

1. Eddy DM. Screening for colorectal cancer. Ann Intern Med 1990;113:373-384. 
2. Laupacis A, Sackett DL, Roberts RS. An assessment of clinically useful measures of the consequences of treatment. N Engl J Med 1988;318:1728-1733. [Medline]
3. Naimark D, Naglie G, Detsky AS. The meaning of life expectancy: what is a clinically significant gain? J Gen Intern Med 1994;9:702-707. [Medline]
4. Welch HG, Albertsen PC, Nease RF, Bubolz TA, Wasson JH. Estimating treatment benefits for the elderly: the effect of competing risks. Ann Intern Med 1996;124:577-584. [Free Full Text]
5. Kassirer JP, Moskowitz AJ, Lau J, Pauker SG. Decision analysis: a progress report. Ann Intern Med 1987;106:275-291.
6. Russell LB, Gold MR, Siegel JE, Daniels N, Weinstein MC. The role of cost-effectiveness analysis in health and medicine. JAMA 1996;276:1172-1177. [Free Full Text]
7. Siegel JE, Weinstein MC, Russell LB, Gold MR. Recommendations for reporting cost-effectiveness analyses. JAMA 1996;276:1339-1341. [Free Full Text]
8. Hatziandreu EI, Koplan JP, Weinstein MC, Caspersen CJ, Warner KE. A cost-effectiveness analysis of exercise as a health promotion activity. Am J Public Health 1988;78:1417-1421. [Erratum, J Public Health 1989;79:273.] [Free Full Text]
9. Tsevat J, Weinstein MC, Williams LW, Tosteson ANA, Goldman L. Expected gains in life expectancy from various coronary heart disease risk factor modifications. Circulation 1991;83:1194-1201. [Erratum, Circulation 1991;84:2610.] [Free Full Text]
10. Grady D, Rubin SM, Petitti DB, et al. Hormone therapy to prevent disease and prolong life in postmenopausal women. Ann Intern Med 1992;117:1016-1037.
11. Lindfors KK, Rosenquist J. The cost-effectiveness of mammographic screening strategies. JAMA 1995;274:881-884. [Erratum, JAMA 1996;275:112.] [Free Full Text]
12. Eddy DM. Screening for cervical cancer. Ann Intern Med 1990;113:214-226.
13. White CC, Koplan JP, Orenstein WA. Benefits, risks and costs of immunization for measles, mumps and rubella. Am J Public Health 1985;75:739-744. [Free Full Text]
14. Hinman AR, Koplan JP. Pertussis and pertussis vaccine: reanalysis of benefits, risks, and costs. JAMA 1984;251:3109-3113. [Free Full Text]
15. Bloom BS, Hillman AL, Fendrick AM, Schwartz JS. A reappraisal of hepatitis B virus vaccination strategies using cost-effectiveness analysis. Ann Intern Med 1993;118:298-306. [Free Full Text]
16. Feldman S, Berkowitz RS, Tosteson ANA. Cost-effectiveness of strategies to evaluate postmenopausal bleeding. Obstet Gynecol 1993;81:968-975. [Medline]
17. Schrag D, Kuntz KM, Garber JE, Weeks JC. Decision analysis -- effects of prophylactic mastectomy and oophorectomy on life expectancy among women with BRCA1 or BRCA2 mutations. N Engl J Med 1997;336:1465-1471. [Erratum, N Engl J Med 1997;337:434.] [Free Full Text]
18. Carson JL, Russell LB, Taragin MI, Sonnenberg FA, Duff AE, Bauer S. The risks of blood transfusion: the relative influence of acquired immunodeficiency syndrome and non-A, non-B hepatitis. Am J Med 1992;92:45-52. [CrossRef][Medline]
19. Birkmeyer JD, AuBuchon JP, Littenburg B, et al. Cost-effectiveness of preoperative autologous donation in coronary artery bypass grafting. Ann Thorac Surg 1994;57:161-168. [Abstract]
20. Wong JB, Sonnenberg FA, Salem DN, Pauker SG. Myocardial revascularization for chronic stable angina: analysis of the role of percutaneous transluminal coronary angioplasty based on data available in 1989. Ann Intern Med 1990;113:852-871.
21. Goldman L, Sia STB, Cook EF, Rutherford JD, Weinstein MC. Costs and effectiveness of routine therapy with long-term beta-adrenergic antagonists after acute myocardial infarction. N Engl J Med 1988;319:152-157. [Abstract]
22. Levin LA, Jonsson B. Cost-effectiveness of thrombolysis -- a randomized study of intravenous rt-PA in suspected myocardial infarction. Eur Heart J 1992;13:2-8.
23. Mark DB, Hlatky MA, Califf RM, et al. Cost effectiveness of thrombolytic therapy with tissue plasminogen activator as compared with streptokinase for acute myocardial infarction. N Engl J Med 1995;332:1418-1424. [Erratum, N Engl J Med 1995;333:267.] [Free Full Text]
24. Larsen GC, Manolis AS, Sonnenberg FA, Beshansky JR, Estes NAM, Pauker SG. Cost-effectiveness of the implantable cardioverter-defibrillator: effect of improved battery life and comparison with amiodarone therapy. J Am Coll Cardiol 1992;19:1323-1334. [Abstract]
25. O'Brien BJ, Buxton MJ, Ferguson BA. Measuring the effectiveness of heart transplant programmes: quality of life data and their relationship to survival analysis. J Chronic Dis 1987;40:Suppl 1:137S-158S.
26. Oster G, Huse DM, Lacey MJ, Epstein AM. Cost-effectiveness of ticlopidine in preventing stroke in high-risk patients. Stroke 1994;25:1149-1156. [Abstract]
27. Fleming C, Wasson JH, Albertsen PC, Barry MJ, Wennberg JE. A decision analysis of alternative treatment strategies for clinically localized prostate cancer. JAMA 1993;269:2650-2658. [Free Full Text]
28. Hillner BE, Smith TJ. Efficacy and cost effectiveness of adjuvant chemotherapy in women with node-negative breast cancer. N Engl J Med 1991;324:160-168. [Abstract]
29. Messori A, Becagli P, Trippoli S, Tendi E. Cost-effectiveness of adjuvant chemotherapy with cyclophosphamide + methotrexate + fluorouracil in patients with node-positive breast cancer. Eur J Clin Pharmacol 1996;51:111-116. [Erratum, Eur J Clin Pharmacol 1997;51:427.] [CrossRef][Medline]
30. Goodwin PJ, Feld R, Evans WK, Pater J. Cost-effectiveness of cancer chemotherapy: an economic evaluation of a randomized trial in small-cell lung cancer. J Clin Oncol 1988;6:1537-1547. [Free Full Text]
31. Jaakkimainen L, Goodwin PJ, Pater J, Warde P, Murray N, Rapp E. Counting the costs of chemotherapy in a National Cancer Institute of Canada randomized trial in nonsmall-cell lung cancer. J Clin Oncol 1990;8:1301-1309. [Abstract]
32. Shibley L, Brown M, Schuttinga J, Rothenberg M, Whalen J. Cisplatin-based combination chemotherapy in the treatment of advanced-stage testicular cancer: cost-benefit analysis. J Natl Cancer Inst 1990;82:186-192. [Free Full Text]
33. Messori A, Bonistalli L, Costantini M, Alterini R. Cost-effectiveness of autologous bone marrow transplantation in patients with relapsed non-Hodgkin's lymphoma. Bone Marrow Transplant 1997;19:275-281. [CrossRef][Medline]
34. Freedberg KA, Scharfstein JA, Seage GR III, et al. The cost-effectiveness of preventing AIDS-related opportunistic infections. JAMA 1998;279:130-136. [Free Full Text]
35. Ransohoff DF, Gracie WA. Treatment of gallstones. Ann Intern Med 1993;119:606-619.
36. Wong JB, Koff RS, Tine F, Pauker SG. Cost-effectiveness of interferon-alpha 2b treatment for hepatitis B e antigen-positive chronic hepatitis B. Ann Intern Med 1995;122:664-675. [Free Full Text]
37. Neutra R. Indications for the surgical treatment of suspected acute appendicitis: a cost-effectiveness approach. In: Bunker JP, Barnes BA, Mosteller F, eds. Costs, risks, and benefits of surgery. New York: OxfordUniversity Press, 1977:277-307.

Abstract PDF Editorial by Detsky, A. S. Letters Add to Personal Archive Add to Citation Manager Notify a Friend E-mail When Cited Related Article by Roizen, M. F. PubMed Citation

Related Letters:

Gains in Life Expectancy from Medical Interventions
Roizen M. F., Roach K., Messori A., Trippoli S., Tendi E., Weinstein M. C., Wright J. C.
Extract | Full Text  
N Engl J Med 1998; 339:1943-1944, Dec 24, 1998. Correspondence

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• Sesso, H. D., Chen, R. S., L'Italien, G. J., Lapuerta, P., Lee, W. C., Glynn, R. J. (2003). Blood Pressure Lowering and Life Expectancy Based on a Markov Model of Cardiovascular Events. Hypertension 42: 885-890 [Abstract] [Full Text]  
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• Goldie, S. J., Kuntz, K. M. (2003). A Potential Error in Evaluating Cancer Screening: A Comparison of 2 Approaches for Modeling Underlying Disease Progression. Med Decis Making 23: 232-241 [Abstract]  
• Siebert, U, Sroczynski, G, Rossol, S, Wasem, J, Ravens-Sieberer, U, Kurth, B M, Manns, M P, McHutchison, J G, Wong, J B (2003). Cost effectiveness of peginterferon {alpha}-2b plus ribavirin versus interferon {alpha}-2b plus ribavirin for initial treatment of chronic hepatitis C. Gut 52: 425-432 [Abstract] [Full Text]  
• Knoll, G. A., Nichol, G. (2003). Dialysis, Kidney Transplantation, or Pancreas Transplantation for Patients with Diabetes Mellitus and Renal Failure: A Decision Analysis of Treatment Options. J. Am. Soc. Nephrol. 14: 500-515 [Abstract] [Full Text]  
• Charlson, M. E., Allegrante, J. P., McKinley, P. S., Peterson, J. C., Boutin-Foster, C., Ogedegbe, G., Young, C. R. (2002). Improving health behaviors and outcomes after angioplasty: using economic theory to inform intervention. Health Educ Res 17: 606-618 [Abstract] [Full Text]  
• Kajbaf, S., Nichol, G., Zimmerman, D. (2002). Cancer screening and life expectancy of Canadian patients with kidney failure. Nephrol Dial Transplant 17: 1786-1789 [Abstract] [Full Text]  
• Col, N. F., Goldberg, R. J., Orr, R. K., Erban, J. K., Fortin, J. M., Chlebowski, R. T. (2002). Survival Impact of Tamoxifen Use for Breast Cancer Risk Reduction: Projections from a Patient-Specific Markov Model. Med Decis Making 22: 386-393 [Abstract]  
• Pepper, P. V., Owens, D. K. (2002). Cost-Effectiveness of the Pneumococcal Vaccine in Healthy Younger Adults. Med Decis Making 22: S45-S57 [Abstract]  
• Mark, D. B., Hlatky, M. A. (2002). Medical Economics and the Assessment of Value in Cardiovascular Medicine: Part I. Circulation 106: 516-520 [Full Text]  
• Blake, G. J., Ridker, P. M., Kuntz, K. M. (2002). Projected life-expectancy gains with statin therapy for individuals with elevated c-reactive protein levels. J Am Coll Cardiol 40: 49-55 [Abstract] [Full Text]  
• Lau, E. W., Ng, G. A. (2002). Visual Illusions Created by Survival Curves and the Need to Avoid Potential Misinterpretation. Med Decis Making 22: 238-244 [Abstract]  
• Blackhouse, G., Briggs, A. H., O'Brien, B. J. (2002). A Note on the Estimation of Confidence Intervals for Cost-Effectiveness When Costs and Effects Are Censored. Med Decis Making 22: 173-177 [Abstract]  
• Jarvik, J. G. (2002). Study Design for the New Millennium: Changing How We Perform Research and Practice Medicine. Radiology 222: 593-594 [Full Text]  
• Ribstein, J., Du Cailar, G., Zanchetti, A. (2002). Cardiac and renal damage in the elderly hypertensive. Journal of Renin-Angiotensin-Aldosterone System 3: S16-S24  
• van den Akker-van Marle, M. E., van Ballegooijen, M., van Oortmarssen, G. J., Boer, R., Habbema, J. D. F. (2002). Cost-Effectiveness of Cervical Cancer Screening: Comparison of Screening Policies. JNCI J Natl Cancer Inst 94: 193-204 [Abstract] [Full Text]  
• Lewis, J. D., Brown, A., Localio, A. R., Schwartz, J. S. (2002). Initial Evaluation of Rectal Bleeding in Young Persons: A Cost-Effectiveness Analysis. ANN INTERN MED 136: 99-110 [Abstract] [Full Text]  
• Hershman, D., Sundararajan, V., Jacobson, J. S., Heitjan, D. F., Neugut, A. I., Grann, V. R. (2002). Outcomes of Tamoxifen Chemoprevention for Breast Cancer in Very High-Risk Women: A Cost-Effectiveness Analysis. JCO 20: 9-16 [Abstract] [Full Text]  
• Llovet, J M, Mas, X, Aponte, J J, Fuster, J, Navasa, M, Christensen, E, Rodes, J, Bruix, J (2002). Cost effectiveness of adjuvant therapy for hepatocellular carcinoma during the waiting list for liver transplantation. Gut 50: 123-128 [Abstract] [Full Text]  
• Kessler, K. M. (2001). Physical Activity and Cardiovascular Risk in Diabetic Women. ANN INTERN MED 135: 930-931 [Full Text]  
• Neilipovitz, D. T., Bryson, G. L., Nichol, G. (2001). The Effect of Perioperative Aspirin Therapy in Peripheral Vascular Surgery: A Decision Analysis. Anesth. Analg. 93: 573-580 [Abstract] [Full Text]  
• Messori, A., Trippoli, S., Vaiani, M., Laurence, J., Freedberg, K. A., Losina, E., Goldie, S. J. (2001). The Cost Effectiveness of Antiretroviral Therapy for HIV Disease. NEJM 345: 68-69 [Full Text]  
• Marchetti, M., Quaglini, S., Barosi, G. (2001). Cost-effectiveness of screening and extended anticoagulation for carriers of both factor V Leiden and prothrombin G20210A. QJM 94: 365-372 [Abstract] [Full Text]  
• Freedberg, K. A., Losina, E., Weinstein, M. C., Paltiel, A. D., Cohen, C. J., Seage, G. R., Craven, D. E., Zhang, H., Kimmel, A. D., Goldie, S. J. (2001). The Cost Effectiveness of Combination Antiretroviral Therapy for HIV Disease. NEJM 344: 824-831 [Abstract] [Full Text]  
• O'Brien, B. J., Connolly, S. J., Goeree, R., Blackhouse, G., Willan, A., Yee, R., Roberts, R. S., Gent, M. (2001). Cost-Effectiveness of the Implantable Cardioverter-Defibrillator : Results From the Canadian Implantable Defibrillator Study (CIDS). Circulation 103: 1416-1421 [Abstract] [Full Text]  
• Bolondi, L, Sofia, S, Siringo, S, Gaiani, S, Casali, A, Zironi, G, Piscaglia, F, Gramantieri, L, Zanetti, M, Sherman, M (2001). Surveillance programme of cirrhotic patients for early diagnosis and treatment of hepatocellular carcinoma: a cost effectiveness analysis. Gut 48: 251-259 [Abstract] [Full Text]  
• Karlawish, J. H. T., Klocinski, J. L., Merz, J., Clark, C. M., Asch, D. A. (2000). Caregivers' preferences for the treatment of patients with Alzheimer's disease. Neurology 55: 1008-1014 [Abstract] [Full Text]  
• Palmer, A. J., Neeser, K., Weiss, C., Brandt, A., Comte, S., Fox, M. (2000). THE LONG-TERM COST-EFFECTIVENESS OF IMPROVING ALCOHOL ABSTINENCE WITH ADJUVANT ACAMPROSATE. Alcohol Alcohol 35: 478-492 [Abstract] [Full Text]  
• Mandelblatt, J., Yabroff, K. R., Lawrence, W., Yi, B., Orosz, G., Bloom, H. G., Schecther, C. B., Extermann, M., Balducci, L., Satadano, W., Fox, S., Silliman, R. A., Fahs, M. C., Muening, P., for the Research on Breast Cancer in Older Women C, , Rozenberg, S., Ham, H., Liebens, F., Seidenwurm, D., Breslau, J., Kerlikowske, K., Phillips, K. A., Cummings, S. R., Salzmann, P., Cauley, J. A. (2000). Screening Mammography in Elderly Women. JAMA 283: 3202-3204 [Full Text]  
• Miller, L.-A., Singer, M. E., Swanson, G. P., Schrag, D., Kuntz, K. M., Garber, J. E., Weeks, J. C. (2000). Benefit of Prophylactic Mastectomy for Women With BRCA1 or BRCA2 Mutations. JAMA 283: 3070-3072 [Full Text]  
• Bryant, J., Clegg, A., Milne, R., Richards, R., Burls, A., Payne, N., Ellis, S. J, Forbes, R. B, Swingler, R. J (2000). Cost utility of drugs for multiple sclerosis. BMJ 320: 1474-1474 [Full Text]  
• Rose, D. N. (2000). Benefits of Screening for Latent Mycobacterium tuberculosis Infection. Arch Intern Med 160: 1513-1521 [Abstract] [Full Text]  
• Schrag, D., Kuntz, K. M., Garber, J. E., Weeks, J. C. (2000). Life Expectancy Gains From Cancer Prevention Strategies for Women With Breast Cancer and BRCA1 or BRCA2 Mutations. JAMA 283: 617-624 [Abstract] [Full Text]  
• Steyerberg, E. W., Kallewaard, M., Van Der Graaf, Y., Van Herwerden, L. A., Habbema, J.D. F. (2000). Decision Analyses for Prophylactic Replacement of the Bjork-Shiley Convexo-concave Heart Valve:: An Evaluation of Assumptions and Estimates. Med Decis Making 20: 20-32 [Abstract]  
• Woolf, S. H. (1999). The Need for Perspective in Evidence-Based Medicine. JAMA 282: 2358-2365 [Abstract] [Full Text]  
• Kuntz, K. M., Tsevat, J., Weinstein, M. C., Goldman, L. (1999). Expert Panel vs Decision-Analysis Recommendations for Postdischarge Coronary Angiography After Myocardial Infarction. JAMA 282: 2246-2251 [Abstract] [Full Text]  
• Kerlikowske, K., Salzmann, P., Phillips, K. A., Cauley, J. A., Cummings, S. R. (1999). Continuing Screening Mammography in Women Aged 70 to 79 Years: Impact on Life Expectancy and Cost-effectiveness. JAMA 282: 2156-2163 [Abstract] [Full Text]  
• Sendi, P. P., Craig, B. A., Meier, G., Pfluger, D., Gafni, A., Opravil, M., Battegay, M., Bucher, H. C. (1999). Cost-effectiveness of azithromycin for preventing Mycobacterium avium complex infection in HIV-positive patients in the era of highly active antiretroviral therapy. J Antimicrob Chemother 44: 811-817 [Abstract] [Full Text]  
• Ng, A. K., Weeks, J. C., Mauch, P. M., Kuntz, K. M. (1999). Decision Analysis on Alternative Treatment Strategies for Favorable-Prognosis, Early-Stage Hodgkin's Disease. JCO 17: 3577-3585 [Abstract] [Full Text]  
• Sarasin, F.P. (1999). Decision analysis and the implementation of evidence-based medicine. QJM 92: 669-671 [Abstract] [Full Text]  
• The Magnetic Resonance Angiography in Relatives of, (1999). Risks and Benefits of Screening for Intracranial Aneurysms in First-Degree Relatives of Patients with Sporadic Subarachnoid Hemorrhage. NEJM 341: 1344-1350 [Abstract] [Full Text]  
• Holland, R. R., Ellis, C. A., Geller, B. M., Plante, D. A., Secker-Walker, R. H. (1999). Life Expectancy Estimation with Breast Cancer: Bias of the Declining Exponential Function and an Alternative to Its Use. Med Decis Making 19: 385-393 [Abstract]  
• Col, N. F., Pauker, S. G., Goldberg, R. J., Eckman, M. H., Orr, R. K., Ross, E. M., Wong, J. B. (1999). Individualizing Therapy to Prevent Long-term Consequences of Estrogen Deficiency in Postmenopausal Women. Arch Intern Med 159: 1458-1466 [Abstract] [Full Text]  
• Fuster, V. (1999). Epidemic of Cardiovascular Disease and Stroke: The Three Main Challenges : Presented at the 71st Scientific Sessions of the American Heart AssociationDallas, Texas. Circulation 99: 1132-1137 [Full Text]  
• Roizen, M. F., Roach, K., Messori, A., Trippoli, S., Tendi, E., Weinstein, M. C., Wright, J. C. (1998). Gains in Life Expectancy from Medical Interventions. NEJM 339: 1943-1944 [Full Text]  
• Wong, J. B., Bennett, W. G., Koff, R. S., Pauker, S. G. (1998). Pretreatment Evaluation of Chronic Hepatitis C: Risks, Benefits, and Costs. JAMA 280: 2088-2093 [Abstract] [Full Text]  
• Detsky, A. S., Redelmeier, D. A. (1998). Measuring Health Outcomes -- Putting Gains into Perspective. NEJM 339: 402-404 [Full Text]  
• Hunink, M.G. M., Krestin, G. P. (2002). Study Design for Concurrent Development, Assessment, and Implementation of New Diagnostic Imaging Technology. Radiology 222: 604-614 [Abstract] [Full Text]