Abstract:To the Editor.—
My interest in the article by Rachelefsky et al (Pediatrics 1986;78:1133-1138) stems in part from the heightened media coverage it received. I must admit as a professional biostatistician that I have some difficulties with regard to its conclusions.
The authors report a P value equal to .004 for the intergroup comparison of change scores for the teacher's behavioral assessment. However, the statistically significant change (P = .04), a reduction for placebo and an … Show more
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