Table 4

Results of a series of stepwise regression analysis looking at DLTV score as a function of distance visual acuity (using two measures—distance VA in the better eye and difference in VA between eyes) and the disorder (cataract, AMD, or neither)

Item		R²		SE		Constant		Regression coefficients
Item		R²		SE		Constant		Acuity in better eye	Acuity difference	AMD present	Cataract present
Distinguish faces across a room	0.450	0.71	4.05	−1.43		−0.50
Seeing objects off to the side	0.068	0.59	3.95	−0.40	−0.22
Watching TV	0.378	0.62	4.10	−1.30	−0.39
Seeing and using steps	0.318	0.60	4.07	−0.87	−0.56
Enjoying scenery	0.403	0.59	4.25	−1.34	−0.28
Reading road signs	0.587	0.68	4.13	−1.95	−0.37	−0.38
Distinguishing faces across the street	0.600	0.73	4.12	−1.79	−0.50	−0.75
Recognising seasonal changes	0.381	0.50	4.23	−1.10	−0.22
Distinguishing faces at arm’s length	0.303	0.55	4.15	−0.72		−0.37
Pouring oneself a drink	0.419	0.46	4.05	−0.43		−0.65
Cutting food on a plate	0.176	0.52	4.01	−0.40		−0.33
Cutting finger nails	0.438	0.69	4.06	−1.41		−0.40
Using kitchen appliances	0.320	0.56	4.01	−0.44		−0.63
Adjusting to darkness	0.193	0.72	3.77	−1.01	−0.32
Adjusting to light	0.227	0.69	3.82	−0.64	−0.43		−0.36
Confidence in immediate neighbourhood	0.191	0.70	4.11	−0.61	−0.54
Confidence outside neighbourhood	0.310	0.93	4.02	−1.58	−0.71
Read normal sized newsprint	0.662	0.71	4.24	−1.88	−0.42	−0.96
Read newspaper headlines	0.462	0.61	4.33	−1.56	−0.29
Read correspondence	0.633	0.71	4.37	−1.88	−0.46	−0.77
Signing documents	0.537	0.65	4.20	−1.56		−0.64
Identifying money	0.550	0.58	4.26	−1.42	−0.23	−0.47
Self rating of overall distance vision	0.404	0.76	3.32	−1.70	−0.55
Self rating of overall near vision	0.353	0.74	3.06	−1.46	−0.39

R ² = coefficient of determination; SE = standard error of the prediction.