Work productivity loss
Among the 87 participants providing work productivity data at baseline, the mean activity impairment was 45% in both groups, which was lower than the full cohort (At 24 weeks and among the 87 participants contributing work productivity loss data at baseline, 74 (85%) provided data at the 24-week visit, 3 (4%) missed the visit, and 10 (11%) completed the visit and provided activity impairment data but not work productivity loss data. Similarly, at 104 weeks and among the 87 participants contributing work productivity loss data at baseline, 61 (70%) provided work productivity loss data, 8 (9%) missed the visit, and 18 (21%) completed the visit and provided activity impairment data but not work productivity loss data. It is unknown whether the participants who completed the visits but did not provide work productivity loss data were still working and declined to answer the questionnaire or if they had stopped working and, if so, whether their vision was the primary reason for stopping working. A longitudinal model that accounts for missing follow-up data under the missing at random assumption produced similar results to the complete case analyses (