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Table 5 NEI VFQ-25 subscale scores and composite score, by condition* and the comparison of R2 between medical condition model and visual acuity model

From: Psychometric properties of the 25-item National Eye Institute Visual Function Questionnaire (NEI VFQ-25), Japanese version

      R2 ****
Subscales Cataract n = 96 Glaucoma n = 69 Age-related Macular Degeneration n = 78 Reference group n = 31 medical condition model visual acuity model
General health 46.9 ± 2.0** 43.6 ± 2.3** 45.7 ± 2.4** 59.6 ± 4.4 .198 .209
General vision 56.0 ± 2.0** 62.7 ± 2.3** 41.2 ± 2.4** 74.0 ± 4.5 .273 .269
Near vision*** 63.0 ± 2.6** (59.5 ± 5.4**) 69.5 ± 3.0 (67.9 ± 2.8) 38.6 ± 3.1** (31.9 ± 2.9**) 77.4 ± 5.8 (74.5 ± 5.4) .341 .346
Distance vision*** 59.1 ± 2.7** (65.1 ± 2.3**) 63.3 ± 3.1 (71.0 ± 2.7**) 40.0 ± 3.2** (47.4 ± 2.8**) 75.9 ± 6.0 (83.7 ± 5.1) .268 .325
Driving 52.2 ± 5.5** 55.3 ± 6.0** 12.8 ± 5.2** 85.0 ± 10.9 .495 .424
Peripheral vision 57.3 ± 2.7 56.9 ± 3.1 64.1 ± 3.3 69.0 ± 6.1 .029 .126
Color vision 85.2 ± 2.1 89.6 ± 2.4 90.0 ± 2.6 88.1 ± 4.5 .081 .119
Ocular pain 80.5 ± 2.0 81.5 ± 2.4 83.2 ± 2.5 83.3 ± 4.6 .036 .100
Vision-specific       
   Role limitation 71.3 ± 2.6** 73.5 ± 3.1 38.4 ± 3.2** 85.5 ± 5.9 .340 .252
   Dependency 75.6 ± 2.8 83.9 ± 3.3 51.3 ± 3.5** 85.8 ± 6.3 .300 .306
   Social function 73.5 ± 2.6** 80.0 ± 2.9 56.3 ± 3.1** 88.1 ± 5.6 .227 .252
   Mental health 65.5 ± 2.5** 68.8 ± 2.9** 37.1 ± 3.1** 89.8 ± 5.7 .330 .300
   25-item composite 66.0 ± 1.6** 69.8 ± 1.9** 51.0 ± 2.0** 80.1 ± 3.7 .331 .331
  1. * Data are presented as mean ± SE adjusted by sex, age, and number of comorbid conditions.
  2. ** Significantly different from the reference group.
  3. *** Scores were recomputed after the substitution of items described in the text. Results of the recomputations are in parentheses.
  4. **** R2 showed the comparison of the explanation of variance caused by the influence of medical condition and visual acuity. The medical condition model have 'medical condition', 'sex', 'age', and 'number of comorbid condisions' as the explanatory variables and the visual acuity model have 'visual acuity', 'sex', 'age', and 'number of comorbid condisions'.