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July 2004

Intravitreal Injection of Triamcinolone for Diffuse MacularEdema—Reply

Arch Ophthalmol. 2004;122(7):1086-1088. doi:10.1001/archopht.122.7.1086

In reply

We thank Drs Kuhn and Barker for their letter and for raising issuesimportant to the interpretation of the results of our study.1 Thefirst issue is the statistical analysis. For comparison of the preinjectiondata with the postinjection data, we used a nonparametric test (Wilcoxon ranksum test) for paired samples. For each comparison, we used data only for thosepatients who contributed preinjection and postinjection measurements. Thisis why the mean visual acuities at 2 weeks and 6 weeks were identical butwith different P values; different patients showed up for thefollow-up examinations at 2 weeks and at 6 weeks.

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