Table 1 Demographic characteristics and baseline values for sleep variables
Characteristic | Elderly | Elderly | Nonelderly | Nonelderly | ||||
|---|---|---|---|---|---|---|---|---|
1 mg | 2 mg | 2 mg | 3 mg | |||||
Witha | Withoutb | Witha | Withoutb | Witha | Withoutb | Witha | Withoutb | |
(n = 38) | (n = 42) | (n = 42) | (n = 41) | (n = 43) | (n = 41) | (n = 37) | (n = 40) | |
Age, y, mean (SD) | 71.5 (5.0) | 69.5 (3.9) | 70.3 (5.1) | 71.0 (4.4) | 37.3 (10.7) | 43.0 (10.1) | 37.6 (9.1) | 45.9 (12.2) |
Sex, n (%) | ||||||||
Male | 20 (52.6) | 15 (35.7) | 20 (47.6) | 14 (34.1) | 11 (25.6)* | 18 (43.9) | 22 (59.5) | 19 (47.5) |
Female | 18 (47.4) | 27 (64.3) | 22 (52.4) | 27 (65.9) | 32 (74.4)* | 23 (56.1) | 15 (40.5) | 21 (52.5) |
Body mass index, kg/m2, mean (SD) | 22.8 (3.4) | 23.1 (3.1) | 23.1 (3.3) | 23.5 (3.3) | 22.6 (4.2) | 24.0 (4.2) | 23.3 (4.0)† | 22.5 (3.2) |
Sleep latency, min | ||||||||
Mean (SD) | 63.3 (44.0) | 67.4 (37.4) | 71.8 (49.6) | 69.7 (45.1) | 78.5 (62.8) | 64.8 (41.3) | 65.7 (46.0) | 62.4 (38.9) |
Median | 60.0 | 60.0 | 60.0 | 60.0 | 60.0 | 60.0 | 60.0 | 55.0 |
Total sleep time, min | ||||||||
Mean (SD) | 317.6 (77.1) | 311.1 (70.4) | 310.2 (67.2) | 305.6 (52.4) | 296.5 (46.8)‡ | 284.7 (40.6)† | 315.3 (60.5) | 301.6 (54.9) |
Median | 330.0 | 310.0 | 330.0 | 300.0 | 300.0 | 290.0 | 330.0 | 300.0 |
Wake time after sleep onset, min | ||||||||
Mean (SD) | 66.7 (56.9) | 57.1 (48.1) | 65.6 (63.0) | 72.1 (63.6) | 51.7 (41.5) | 54.9 (42.6) | 40.8 (40.5) | 43.8 (41.6) |
Median | 60.0 | 40.0 | 35.0 | 50.0 | 40.0 | 60.0 | 30.0 | 33.8 |