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. Author manuscript; available in PMC: 2008 Apr 1.
Published in final edited form as: Am J Prev Med. 2008 Mar;34(3):185–191. doi: 10.1016/j.amepre.2007.11.020

Figure 1. Flow of subjects through the “Vision is Precious” study, from eligibility assessment to analysis.

Figure 1

a All exclusions after randomization were due to belated discovery of failure to meet eligibility requirements, specifically these excluded subjects turned out to have had a dilated fundus exam (DFE) within the year preceding randomization, though they did not report this at the time of enrollment.

b One subject died within the 6-month follow-up period for the primary study outcome.

c Subjects who withdrew consent or died were not excluded from analysis; rather, the DFE status as of the time of withdrawal/death was used as their study outcome.