Background Many believe that managed care creates pressure onphysicians to increase productivity, see more patients, andspend less time with each patient.
Methods We used nationally representative data from the NationalAmbulatory Medical Care Survey (NAMCS) of the National Centerfor Health Statistics and the American Medical Association'sSocioeconomic Monitoring System (SMS) to examine the lengthof office visits with physicians from 1989 through 1998. Weassessed the trends for visits covered by a managed-care orother prepaid health plan (prepaid visits) and non-prepaid visitsfor primary and specialty care, for new and established patients,and for common and serious diagnoses.
Results Between 1989 and 1998 the number of visits to physicians'offices increased significantly from 677 million to 797 million,although the rate of visits per 100 population did not changesignificantly. The average duration of office visits in 1989was 16.3 minutes according to the NAMCS and 20.4 minutes accordingto the SMS survey. According to both sets of data, the averageduration of visits increased by between one and two minutesbetween 1989 and 1998. The duration of the visits increasedfor both prepaid and non-prepaid visits. Non-prepaid visitswere consistently longer than prepaid visits, although the gapdeclined from 1 minute in 1989 to 0.6 minute in 1998. Therewas an upward trend in the length of visits for both primaryand specialty care and for both new and established patients.The average length of visits remained stable or increased forpatients with the most common diagnoses and for those with themost serious diagnoses.
Conclusions Contrary to expectations, the growth of managedhealth care has not been associated with a reduction in thelength of office visits. The observed trends cannot be explainedby increases in physicians' availability, shifts in the distributionof physicians according to sex, or changes in the complexityof the case mix.
Source Information
From the Institute for Health, Health Care Policy, and Aging Research, Rutgers University, New Brunswick, N.J.
Address reprint requests to Dr. Mechanic at the Institute for Health, Health Care Policy, and Aging Research, Rutgers University, 30 College Ave., New Brunswick, NJ 08901, or at mechanic{at}rci.rutgers.edu.
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