Table 1 The basic characteristics of study participants of 30,317 Chinese oldest-old people at the initial survey
Variables | Total (n = 30,317) | Better SWB (n = 6512) | Worse SWB (n = 23,805) | Women (n = 17,663) | Men (n = 12,654) |
|---|---|---|---|---|---|
Age group | |||||
 80–89 years | 13,419 (44.3) | 3309 (24.7) | 10,110 (75.3)**a | 6567 (37.2) | 6852 (54.1)** |
 90–99 years | 9923 (32.7) | 1968 (19.8) | 7955 (80.2) | 5600 (31.7) | 4323 (34.2) |
  ≥ 100 years | 6975 (23.0) | 1235 (17.7) | 5740 (82.3) | 5496 (31.1) | 1479 (11.7) |
Gender | |||||
 Women | 17,663 (58.3) | 3346 (18.9) | 14,317 (81.1)** |  |  |
 Men | 12,654 (41.7) | 3166 (25.0) | 9488 (75.0) |  |  |
Ethnic group | |||||
 Han nationality | 28,442 (93.8) | 6250 (22.0) | 22,192 (78.0)** | 16,532 (93.6) | 11,910 (94.1) |
 Ethnic minorities | 1875 (6.2) | 262 (14.0) | 1613 (86.0) | 1131 (6.4) | 744 (5.9) |
Education | |||||
 0 year | 20,317 (67.0) | 3691 (18.2) | 16,626 (81.8)** | 2375 (13.4) | 7625 (60.3)** |
  ≥ 1 years | 10,000 (33.0) | 2821 (28.2) | 7179 (71.8) | 15,288 (86.6) | 5029 (39.7) |
Primary occupation before retirement | |||||
 White-collar | 2207 (7.3) | 866 (39.2) | 1341 (60.8)** | 400 (2.3) | 1807 (14.3)** |
 Others | 28,110 (92.7) | 5646 (20.1) | 22,464 (79.9) | 17,263 (97.7) | 10,847 (85.7) |
Current marital status | |||||
 Married and not separated | 6119 (20.2) | 1729 (28.3) | 4390 (71.7)** | 1457 (8.2) | 4662 (36.8)** |
 Separated | 412 (1.4) | 77 (18.7) | 335 (81.3) | 106 (0.6) | 306 (2.4) |
 Divorced | 132 (0.4) | 24 (18.2) | 108 (81.8) | 50 (0.3) | 82 (0.6) |
 Widowed | 23,332 (77.0) | 4619 (19.8) | 18,713 (80.2) | 15,954 (90.3) | 7378 (58.3) |
 Never married | 322 (1.1) | 63 (19.6) | 259 (80.4) | 96 (0.5) | 226 (1.8) |
Place of residence | |||||
 City | 6866 (22.6) | 2153 (31.4) | 4713 (68.6)**a | 3731 (21.1) | 3135 (24.8)** |
 Town | 7116 (23.5) | 1513 (21.3) | 5603 (78.7) | 4110 (23.3) | 3006 (23.8) |
 Rural areas | 16,335 (53.9) | 2846 (17.4) | 13,489 (82.6) | 9822 (55.6) | 6513 (51.5) |
ADL disability | |||||
 Yes | 4884 (16.1) | 791 (16.2) | 4093 (83.8)** | 3476 (19.7) | 1408 (11.1)** |
 No | 25,433 (83.9) | 5721 (22.5) | 19,712 (77.5) | 14,187 (80.3) | 11,246 (88.9) |
Self-rated health | |||||
 Very good | 3692 (12.2) | 1981 (53.7) | 1711 (46.3)**a | 1946 (11.0) | 1746 (13.8)** |
 Good | 12,678 (41.8) | 3020 (23.8) | 9658 (76.2) | 7295 (41.3) | 5383 (42.5) |
 Fair | 10,288 (33.9) | 1261 (12.3) | 9027 (87.7) | 6135 (34.7) | 4153 (32.8) |
 Bad | 3390 (11.2) | 240 (7.1) | 3150 (92.9) | 2128 (12.0) | 1262 (10.0) |
 Very bad | 269 (0.9) | 10 (3.7) | 259 (96.3) | 159 (0.9) | 110 (0.9) |
Hypertension | |||||
 Yes | 5252 (17.3) | 1088 (20.7) | 4164 (79.3) | 3073 (17.4) | 2179 (17.2) |
 No | 25,065 (82.7) | 5424 (21.6) | 19,641 (78.4) | 14,590 (82.6) | 10,475 (82.8) |
Diabetes | |||||
 Yes | 541 (1.8) | 135 (25.0) | 406 (75.0) | 290 (1.6) | 251 (2.0) |
 No | 29,776 (98.2) | 6377 (21.4) | 23,399 (78.6) | 17,373 (98.4) | 12,403 (98.0) |
Heart disease | |||||
 Yes | 2486 (8.2) | 565 (22.7) | 1921 (77.3) | 1407 (8.0) | 1079 (8.5) |
 No | 27,831 (91.8) | 5947 (21.4) | 21,884 (78.6) | 16,256 (92.0) | 11,575 (91.5) |
Cerebrovascular disease | |||||
 Yes | 1302 (4.3) | 230 (17.7) | 1072 (82.3)* | 635 (3.6) | 667 (5.3)** |
 No | 29,015 (95.7) | 6282 (21.7) | 22,733 (78.3) | 17,028 (96.4) | 11,987 (94.7) |
Respiratory disease | |||||
 Yes | 3593 (11.9) | 696 (19.4) | 2897 (80.6)* | 1802 (10.2) | 1791 (14.2)** |
 No | 26,724 (88.1) | 5816 (21.8) | 20,908 (78.2) | 15,861 (89.8) | 10,863 (85.8) |
Cancer | |||||
 Yes | 124 (0.4) | 30 (24.2) | 94 (75.8) | 64 (0.4) | 60 (0.5) |
 No | 30,193 (99.6) | 6482 (21.5) | 23,711 (78.5) | 17,599 (99.6) | 12,594 (99.5) |