Table 2.
Course of sleep quality throughout the study
| Patients | Baseline visit | 6-month visit | 12-month visit | 18-month visit | 24-month visit |
|---|---|---|---|---|---|
| All patients, N | 128 | 109 | 96 | 65 | 61 |
| Patients with evaluable questionnaires, N | 106 | 90 | 82 | 51 | 41 |
| PSQI mean (SD) | 7.31 (4.36) | 6.37 (3.99) | 6.43 (4.03) | 6.45 (4.48) | 6.71 (4.11) |
| PSQI median (range) | 6.0 (1.0–18.0) | 5.5 (1.0–20.0) | 5.0 (1.0–18.0) | 5.0 (0.0–18.0) | 5.0 (1.0–18.0) |
| Proportion of patients with PSQI≥5 (95% confidence interval) | 55.47 (46.43–64.25) | 46.79 (37.17–56.59) | 50.00 (39.62–60.38) | 49.23 (36.60–61.93) | 37.70 (25.61–51.04) |
| Sensitivity analysis, N | 28 | 28 | 28 | 28 | 28 |
| PSQI mean (SD) | 6.75 (3.95) | 6.43 (4.26) | 6.00 (3.22) | 6.21 (4.07) | 6.29 (3.61) |
| PSQI median (range) | 5.0 (1.0–14.0) | 4.0 (1.0–18.0) | 5.5 (2.0–14.0) | 5.0 (1.0–18.0) | 5.0 (1.0–16.0) |
| Proportion of patients with PSQI≥5 (95% confidence interval) | 57.14 (37.18–75.54) | 46.43 (27.51–66.13) | 57.14 (37.18–75.54) | 64.29 (44.07–81.36) | 53.57 (33.87–72.49) |
PSQI Pittsburgh Sleep Quality Index, SD standard deviation