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Table 1 Patient characteristics (N = 296)

From: Re-evaluating a vision-related quality of life questionnaire with item response theory (IRT) and differential item functioning (DIF) analyses

Gender   
Female 183 61.8%
Male 113 38.2%
Age   
< 75 years 76 25.7%
≥75 years 220 74.3%
LogMAR visual acuity*   
< 0.52 mild vision loss 97 32.9%
≥ 0.52 low vision/blindness 198 67.1%
Main cause of vision loss in best eye*   
Age-related macular degeneration 154 52.6%
Other eye conditions 139 47.4%
Rehabilitation type   
Optometric service 161 54.4%
Multidisciplinary service 135 45.6%
Administration type*   
Self-report 108 37.1%
Assisted 183 62.9%
  1. * 1, 3 and 5 missing values