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Table 2 Distribution and comparison of the PSQI scores among robust, pre-frail and frail groups

From: Associations of sleep quality and sleep duration with frailty and pre-frailty in an elderly population Rugao longevity and ageing study

Sleep variablesRobust(656)Pre-frail(911)Frail(157)P
 Poor subjective sleep quality   < 0.001
 Total score ≤ 5430 (65.5)473 (52)69 (43.9) 
 Total score > 5226 (34.5)436 (48)88 (56.1) 
Sleep quality component   < 0.001
 0155 (23.7)212 (23.5)25 (15.9) 
 1427 (65.4)524 (58)95 (60.5) 
 264 (9.8)156 (17.3)33 (21) 
 37 (1.1)12 (1.3)4 (2.5) 
Sleep latency component   < 0.001
 0231 (36.9)234 (27.4)40 (27.6) 
 1276 (44.1)396 (46.4)50 (34.5) 
 281 (12.9)137 (16)30 (20.7) 
 338 (6.1)87 (10.2)25 (17.2) 
Sleep duration component   0.021
 0342 (53.3)482 (54.2)90 (59.6) 
 1244 (38)329 (37)37 (24.5) 
 231 (4.8)46 (5.2)13 (8.6) 
 325 (3.9)33 (3.7)11 (7.3) 
Sleep efficiency component   0.002
 0322 (50.5)409 (47.3)65 (43.6) 
 1129 (20.2)149 (17.2)23 (15.4) 
 276 (11.9)123 (14.2)13 (8.7) 
 3111 (17.4)184 (21.3)48 (32.2) 
Sleep disturbances component   < 0.001
 031 (4.7)24 (2.6)2 (1.3) 
 1531 (80.9)640 (70.3)102 (65) 
 293 (14.2)242 (26.6)51 (32.5) 
 31 (0.2)4 (0.4)2 (1.3) 
Sleep medication use component   0.147
 0643 (98.8)888 (98.4)149 (96.8) 
 12 (0.3)1 (0.1)2 (1.3) 
 24 (0.6)5 (0.6)2 (1.3) 
 32 (0.3)8 (0.9)1 (0.6) 
Daytime dysfunction component   < 0.001
 0465 (71.6)469 (51.8)54 (34.4) 
 1120 (18.5)176 (19.4)40 (25.5) 
 259 (9.1)203 (22.4)37 (23.6) 
 35 (0.8)57 (6.3)26 (16.6)