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Hope C. Solomons, EdD; Richard Elardo, PhD
University of Iowa Iowa City

JAMA. 1993;269(21):2734.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

To the Editor.

—In their Review, "Infectious Diseases and Injuries in Child Day Care," Thacker et al¹ have made several methodological errors in their analysis of injuries. We have summarized these below:

First, in two of our earlier articles^2,3 on day-care injuries that occurred during a 5-year and a 3.5-year span, each study had a total of 133 subjects. However, we noted that not all children were enrolled for the entire duration. Injury rate was defined as the number of injuries divided by exposure; exposure was the product of the number of subjects multiplied by the subjects' time in the study. Use by Thacker et al of the total rather than the average number of children per year resulted in a large underestimate of the true injury rate.

Bitner and DeLissovoy⁴ stated that there were 58 children in three classrooms (the number cited by Thacker et al) . . . [Full Text PDF of this Article]

Footnotes
Edited by Drummond Rennie, MD, Deputy Editor (West), and Margaret A. Winker, MD, Senior Editor.

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