Table 8.

Visual acuity in left eye and right eye over time and their cross-sectional and longitudinal correlations (Pearson Correlation) among randomly selected 200 participants in eyes with AMD category 3 at baseline in the AREDS (200 participants, 114 bilateral, 86 unilateral).

		Time points (Months)
		0	12	24	36	48	60
Left eye	Mean (SD) VA score	83.5 (6.2)	82.2 (7.7)	81.1 (10.3)	80.1 (11.0)	79.9 (10.2)	78.0 (12.0)
Right eye	Mean (SD) VA score	83.6 (5.6)	82.9 (7.1)	81.9 (10.2)	80.5 (11.5)	77.6 (16.3)	76.2 (18.4)
Left eye		Pearson Correlation Coefficient
	0 (N = 161)	1.00	0.34	0.20	0.23	0.33	0.29
	12 (N = 155)		1.00	0.63	0.59	0.52	0.48
	24 (N = 145)			1.00	0.76	0.69	0.56
	36 (N = 144)				1.00	0.76	0.64
	48 (N = 134)					1.00	0.89
	60 (N = 131)						1.00
Right eye
	0 (N = 153)	1.00	0.42	0.30	0.30	0.26	0.25
	12 (N = 149)		1.00	0.69	0.59	0.50	0.44
	24 (N = 137)			1.00	0.86	0.67	0.58
	36 (N = 136)				1.00	0.79	0.69
	48 (N = 129)					1.00	0.91
	60 (N = 126)						1.00
Combined
	0 (N = 314)	1.00	0.38	0.25	0.27	0.27	0.26
	12 (N = 304)		1.00	0.66	0.59	0.49	0.44
	24 (N = 282)			1.00	0.81	0.67	0.57
	36 (N = 280)				1.00	0.77	0.67
	48 (N = 263)					1.00	0.90
	60 (N = 257)						1.00
Inter-eye correlation	Pearson ρ	0.49	0.23	0.23	0.20	0.40	0.44
	N of bilateral subjects	114	111	101	101	94	92