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Previous Volume 338:389-391 February 5, 1998 Number 6 Next

	Since this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.

	Full Text Add to Personal Archive Add to Citation Manager Notify a Friend E-mail When Cited Related Article by Dement, W. C. Related Article by Mitler, M. M. Related Article by Mitler, M. M. PubMed Citation

To the Editor: The article by Mitler et al. on the sleep of long-haul truck drivers (Sept. 11 issue)¹ presents data on drowsiness. The authors state, "Of the total of 29,310 six-minute video recordings of the drivers' faces that we analyzed, 1989 of the segments (7 percent) were judged to show a drowsy driver." However, according to a footnote to Table 4, it appears that the numerator for this percentage is derived from the sampled segments (consisting of one 6-minute segment per 30 minutes of observation time) and the denominator is the universe of segments from which the sample was . . . [Full Text of this Article]

References

This article has been cited by other articles:

• Rivkees, S. A. (2003). Time to Wake-Up to the Individual Variation in Sleep Needs. J. Clin. Endocrinol. Metab. 88: 24-25 [Full Text]