Table 2 Distribution and comparison of the PSQI scores among robust, pre-frail and frail groups
Sleep variables | Robust(656) | Pre-frail(911) | Frail(157) | P |
|---|---|---|---|---|
 Poor subjective sleep quality |  |  |  | < 0.001 |
 Total score ≤ 5 | 430 (65.5) | 473 (52) | 69 (43.9) |  |
 Total score > 5 | 226 (34.5) | 436 (48) | 88 (56.1) |  |
Sleep quality component |  |  |  | < 0.001 |
 0 | 155 (23.7) | 212 (23.5) | 25 (15.9) |  |
 1 | 427 (65.4) | 524 (58) | 95 (60.5) |  |
 2 | 64 (9.8) | 156 (17.3) | 33 (21) |  |
 3 | 7 (1.1) | 12 (1.3) | 4 (2.5) |  |
Sleep latency component |  |  |  | < 0.001 |
 0 | 231 (36.9) | 234 (27.4) | 40 (27.6) |  |
 1 | 276 (44.1) | 396 (46.4) | 50 (34.5) |  |
 2 | 81 (12.9) | 137 (16) | 30 (20.7) |  |
 3 | 38 (6.1) | 87 (10.2) | 25 (17.2) |  |
Sleep duration component | Â | Â | Â | 0.021 |
 0 | 342 (53.3) | 482 (54.2) | 90 (59.6) |  |
 1 | 244 (38) | 329 (37) | 37 (24.5) |  |
 2 | 31 (4.8) | 46 (5.2) | 13 (8.6) |  |
 3 | 25 (3.9) | 33 (3.7) | 11 (7.3) |  |
Sleep efficiency component | Â | Â | Â | 0.002 |
 0 | 322 (50.5) | 409 (47.3) | 65 (43.6) |  |
 1 | 129 (20.2) | 149 (17.2) | 23 (15.4) |  |
 2 | 76 (11.9) | 123 (14.2) | 13 (8.7) |  |
 3 | 111 (17.4) | 184 (21.3) | 48 (32.2) |  |
Sleep disturbances component |  |  |  | < 0.001 |
 0 | 31 (4.7) | 24 (2.6) | 2 (1.3) |  |
 1 | 531 (80.9) | 640 (70.3) | 102 (65) |  |
 2 | 93 (14.2) | 242 (26.6) | 51 (32.5) |  |
 3 | 1 (0.2) | 4 (0.4) | 2 (1.3) |  |
Sleep medication use component | Â | Â | Â | 0.147 |
 0 | 643 (98.8) | 888 (98.4) | 149 (96.8) |  |
 1 | 2 (0.3) | 1 (0.1) | 2 (1.3) |  |
 2 | 4 (0.6) | 5 (0.6) | 2 (1.3) |  |
 3 | 2 (0.3) | 8 (0.9) | 1 (0.6) |  |
Daytime dysfunction component |  |  |  | < 0.001 |
 0 | 465 (71.6) | 469 (51.8) | 54 (34.4) |  |
 1 | 120 (18.5) | 176 (19.4) | 40 (25.5) |  |
 2 | 59 (9.1) | 203 (22.4) | 37 (23.6) |  |
 3 | 5 (0.8) | 57 (6.3) | 26 (16.6) | – |