To the Editor: Dr. Mathews and colleagues request further information about the randomized, placebo-controlled trial of citalopram for treatment of depression in children and adolescents. Randomization was on a 1:1 basis and was stratified by age group. The random assignment list was concealed from the investigators, which is fundamental to the claim that the study was performed under double-blind conditions. The protocol-specified population for all efficacy analyses, defined as the "intent-to-treat" population, included all patients who received at least one dose of double-blind study medication and had at least one postbaseline efficacy assessment. The analyses we presented in the manuscript were not only conventional in nature; they were, in fact, defined a priori. The justification for defining this population for the efficacy analyses is that the primary analysis was the change from baseline, therefore requiring a postbaseline assessment.