Table 1 Characteristics of study population at baseline by survival status and quality of dying
Characteristics, No. (%) | Participants for sleep duration-total mortality association | Participants for sleep duration-quality of dying association | ||
|---|---|---|---|---|
Alive (n = 3466) | Dead (n = 11,582) | Good (n = 6528) | Poor (n = 4116) | |
Female sex | 2113 (60.9) | 7154 (61.8) | 4182 (57.7) | 2683 (65.2) |
Age at baseline a | 89.3 (6.9) | 93.9 (6.7) | – | – |
Age at death a | – | – | 96.7 (6.4) | 96.5 (6.6) |
Region of residence | ||||
 Urban | 1357 (39.1) | 4228 (36.5) | 2312 (35.4) | 1588 (38.6) |
 Rural | 2109 (60.9) | 7354 (63.5) | 4216 (64.6) | 2528 (61.4) |
Educational attainment a | 3.1 (1.6) | 1.3 (2.8) | 1.3 (2.8) | 1.2 (2.8) |
In marriage | 913 (26.3) | 1651 (14.3) | 945 (14.5) | 558 (13.6) |
White collar occupation | 207 (6.0) | 510 (4.4) | 303 (4.6) | 166 (4.0) |
Economic condition | ||||
 High | 595 (17.2) | 1644 (14.2) | 946 (14.5) | 591 (14.4) |
 Medium | 2277 (65.7) | 7737 (66.8) | 4378 (67.1) | 2749 (66.8) |
 Low | 594 (17.1) | 2201 (19.0) | 1204 (18.4) | 776 (18.8) |
Regular exercise | 1005 (29.0) | 2491 (21.5) | 1514 (23.2) | 768 (18.7) |
Current smoking | 546 (15.8) | 1740 (15.0) | 1066 (16.3) | 541 (13.1) |
Current drinking | 638 (18.4) | 2028 (17.5) | 1196 (18.3) | 669 (16.3) |
Cognitive impairment | 639 (18.4) | 4740 (40.9) | 2625 (40.2) | 1770 (43.0) |
Functional limitation | 541 (15.6) | 4152 (35.8) | 2166 (33.2) | 1690 (41.1) |
Depression | 1070 (30.9) | 4552 (39.3) | 2509 (38.4) | 1654 (40.2) |
Chronic conditions b | ||||
 0 | 2286 (66.0) | 7928 (68.5) | 4546 (69.6) | 2743 (66.6) |
  ≥ 1 | 1180 (34.0) | 3654 (31.5) | 1982 (30.4) | 1373 (33.4) |