Table 5.

Nine-item National Eye Institute Visual Function Questionnaire (NEI VFQ-9) Composite Scores by Clinical Measure of Visual Function in Women Who Participated in the Study of Osteoporotic Fractures (SOF) Year-10 Clinic Visits.

Clinical Measure of Visual Function	NEI VFQ
	Composite Score (9-item)* N=3,631	Composite Score (8-item)† N=5,311
Overall: Mean ± SD (Median)	91.3 ± 11.5 (95)	88.8 ± 13.7 (94)
Visual acuity (log MAR)
Better eye
Spearman correlation coefficient	−0.21 P<0.001	−0.24 P<0.001
Mean ± SD (Median)
20/40 or better	92.6 ± 8.5 (95)	90.8 ± 10.4 (94)
Worse than 20/40	85.1 ± 17.3 (92)	80.6 ± 19.7 (89)
P-value‡	P<0.001	P<0.001
Worse eye
Spearman correlation coefficient	−0.23 P<0.001	−0.26 P<0.001
Mean ± SD (Median)
20/40 or better	93.3 ± 8.1 (96)	91.7 ± 9.8 (95)
Worse than 20/40	89.1 ± 12.8 (94)	85.9 ± 15.5 (91)
P-value‡	P<0.001	P<0.001
Binocular visual field loss (number of points missed)§
Spearman correlation coefficient	−0.14 P<0.001	−0.16 P<0.001
Mean ± SD (Median)
None (No point missed)	93.6 ± 7.0 (96)	92.4 ± 8.3 (95)
Mild (1–9 points missed)	92.1 ± 9.2 (95)	90.9 ± 10.2 (94)
Moderate (10–19 points missed)	90.1 ± 11.1 (95)	88.2 ± 12.1 (93)
Severe (20 or more points missed)	87.0 ± 14.8 (92)	83.0 ± 17.6 (89)
P-value‡	P<0.001	P<0.001

SD = Standard deviation.

^*NEI VFQ-9 9 item composite score was calculated among women who had valid responses to all 9 items.

^†NEI VFQ-9 8 item composite score was calculated among women who had valid responses to all 8 items, except for the driving item.

^‡Kruskal-Wallis test.

^§Binocular visual field loss were calculated among women who had reliable (fixation loss ≤ 33%) visual field test in both eyes. Spearman correlation coefficient = −0.18 (p<0.001) between binocular visual field loss and NEI VFQ peripheral subscale.