Table 1.
Characteristics | Round 4 Participants
|
Age-Adjusted P Value* | |
---|---|---|---|
MD ≤ −3 dB in at Least 1 Eye (n = 490) | MD > − 3 dB in Both Eyes (n = 608) | ||
Age (yrs), mean ± SD | 80.7±4.7 | 78.7±4.0 | <0.0001 |
Male, n (%) | 183 (37) | 264 (43) | 0.13 |
African American, n (%) | 166 (34) | 81 (13) | <0.0001 |
Last grade completed, mean ± SD | 11.0±3.6 | 12.3±3.1 | <0.0001 |
MMSE score, mean ± SD | 25.0±3.7 | 26.9±2.4 | <0.0001 |
Depressed, n (%) | 43 (9) | 32 (5) | 0.01 |
No. comorbid conditions, mean ± SD | 3.6±2.0 | 3.3±1.8 | 0.03 |
logMAR acuity, mean ± SD | 0.13±0.25 | 0.00±0.11 | <0.0001 |
Contrast sensitivity, mean ± SD† | 31.5±4.7 | 34.7±2.4 | <0.0001 |
Better-eye VF MD, median (P5, P95) | −3.6 (−16.8 to −0.5) | −0.4 (−2.1 to +1.3) | <0.0001 |
Worse-eye VF MD, median (P5, P95) | −6.2 (−23.8 to −3.2) | −1.2 (−2.8 to +0.4) | <0.0001 |
logMAR = logarithm of minimal angle of resolution; MD = mean deviation; MMSE = Mini Mental State Examination; P5 = 5th percentile; P95 = 95th percentile; SD = standard deviation.
Age difference was evaluated using the Student t test; all other P values were taken from bivariate logistic, log-linear, or linear regression models with age and the given characteristic included as covariates. All age-adjusted differences between the 2 groups were in the same direction as the unadjusted statistics shown.
Contrast sensitivity expressed as the number of letters correctly read on the Pelli-Robson chart in the better eye with best correction.