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

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

					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

* Data are presented as mean ± SE adjusted by sex, age, and number of comorbid conditions.
** Significantly different from the reference group.
*** Scores were recomputed after the substitution of items described in the text. Results of the recomputations are in parentheses.
**** 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'.

ISSN: 1477-7525