Vision-targeted health related quality of life in older adults: patient-reported visibility problems in low luminance activities are more likely to decline than daytime activities

Table 5 Vision variables stratified by participants with a ≥ 5 point decrease in the LLQ composite from baseline to 3-year follow-up versus those whose scores did not decrease by ≥ 5 points

	LLQ composite decreased by ≥ 5 points N = 85	LLQ composite did not decrease by ≥ 5 points N = 280	p-value	NEI VFQ-25 composite decreased by ≥ 5 points N =	NEI VFQ-25 composite did not decrease by ≥ 5 points N =	p-value
	Mean (standard deviation) unless otherwise noted
Visual acuity at baseline (logMAR)	−0.02	−0.02	0.9908	0.00	−0.02	0.1196
Change in visual acuty ^a	−0.06	−0.04	0.4341	−0.10	−0.04	0.0145
Contrast sensitivity, log sensitivity	1.63	1.65	0.1482	1.65	1.64	0.7051
Change in contrast sensitivity	0.05	0.04	0.7315	0.06	0.04	0.3192
Light sensitivity, dB ^b	30.4	30.6	0.3264	30.5	30.6	0.8041
Low luminance deficit	0.30	0.29	0.5884	0.31	0.29	0.2780
Change in low luminance deficit	−0.05	−0.04	0.7105	−0.08	−0.04	0.1039
Rod-mediated dark adaptation, rod intercept (minutes)	10.45	10.10	0.4050	10.1	10.2	0.8394
Change in rod-mediated dark adaptation	−1.26	−0.85	0.3121	−1.8	−0.8	0.0832

^a Change in visual function variables defined as the value at baseline minus the value at the 3-year follow-up
^b Light sensitivity was only measured at baseline

ISSN: 1471-2415