Baseline demographic and clinical variables by medication adherence*
| Variable | ≥80% adherence | <80% adherence | Total | P value† |
| Male, n (%) | 53 (96.36) | 21 (87.50) | 74 (93.67) | 0.16 |
| White, n (%) | 24 (43.64) | 6 (25.00) | 30 (37.97) | 0.14 |
| Visual field‡ baseline severity: uninterpretable, n (%) | 5 (9.80) | 4 (18.18) | 9 (12.33) | 0.69 |
| Visual field baseline severity: severe, n (%) | 16 (31.37) | 5 (22.73) | 21 (28.77) | |
| Visual field baseline severity: moderate, n (%) | 14 (27.45) | 5 (22.73) | 19 (26.03) | |
| Visual field baseline severity: mild, n (%) | 16 (31.37) | 8 (36.36) | 24 (32.88) | |
| Baseline visual acuity ≥20/50 in either eye, n (%) | 14 (25.45) | 6 (25.00) | 20 (25.32) | 1.0 |
| Subject age, mean (SD) | 67.78 (8.79) | 63.96 (10.10) | 66.62 (9.31) | 0.11 |
| Number of medications, mean (SD) | 2.37 (1.15) | 1.92 (1.14) | 2.23 (1.16) | 0.10 |
| Number of days monitored, mean (SD) | 176.5 (44.37) | 212.7 (93.13) | 187.5 (64.81) | 0.33 |
| REALM score§,mean (SD) | 60.98 (6.56) | 57.73 (13.68) | 60.03 (9.25) | 0.50 |
There was one subject missing medication data and four subjects missing REALM data.
*≥80% of prescribed doses taken according to electronic monitor; <80% of prescribed doses taken according to medication monitor.
↵†P value from χ2 for categorical variables and t-test for continuous variables.
‡Visual fields with >33% fixation losses, false-positives or false-negatives and/or with artefact such as a cloverleaf pattern or rim defect were labelled uninterpretable.
↵§REALM, Rapid Estimate of Adult Literacy in Medicine, ranges 0–66, >60 is equivalent to ninth-grade reading level or above.