Table 3.

The Number and Percentage of Item Responses at Ceiling, Floor, or Missing for the 9-item National Eye Institute Visual Function Questionnaire (NEI VFQ-9) in Women Who Participated in the Study of Osteoporotic Fractures (SOF) Year-10 Clinic Visits (N=5474)^*.

NEI VFQ-9 items	Missing N (%)	Floor N (%)	Ceiling N (%)
General vision
6-level general vision	0	7 (0.1%)	817 (15%)
Near vision
6-level reading normal newsprint	18 (0.3%)	121 (2%)	3,998 (73%)
6-level seeing well up close	59 (1%)	114 (2%)	4,018 (73%)
6-level finding objects on crowded shelf	13 (0.2%)	19 (0.3%)	4,615 (84%)
Distance vision
6-level going down stairs at night	94 (2%)	39 (0.7%)	3,922 (72%)
Driving
6-level daylight familiar places	1,785 (33%)	102 (2%)	3,484 (64%)
Peripheral vision
6-level seeing objects off to side	9 (0.2%)	15 (0.3%)	4,776 (87%)
Role limitation
5-level limited in endurance	4 (0.1%)	74 (1%)	5,030 (92%)
Well-being/Mental health
5-level amount time: Worry	1 (0.02%)	234 (4%)	3,644 (67%)

^*Excluding eight women who did not have valid responses to all nine questions.