Table 1 Sensitivity analysis: basic epidemiological characteristics of study population and excluded sample
Category | General information | Variables | Study population (‾x ± s/%) | Excluded sample (x ± s/%) | P value |
|---|---|---|---|---|---|
Gender | Men | 2994 (49.97) | 593 (50.99) | 0.519 | |
Women | 2998 (50.03) | 570 (49.01) | |||
Missing value | 0 | ||||
Age (years) | 60 ~ 69 | 3559(59.40) | 623(53.57) | 0.945 | |
≥ 70 | 2433(40.60) | 540(46.43) | |||
Missing value | 0 | ||||
Residential areas | Urban areas | 1226 (20.46) | 169 (14.57) | 0.035 | |
Rural areas | 4766 (79.54) | 991 (85.43) | |||
Missing value | 4 (0.26) | ||||
BMI (kg/m =2 ) | BMI index | 22.88 ± 4.12 | 22.35 ± 4.20 | 0.714 | |
Missing value | 1009 (86.68) | ||||
Blood pressure (mmHg) | Systolic pressure | 136.03 ± 25.37 | 136.85 ± 24.05 | 0.507 | |
Diastolic pressure | 75.21 ± 11.81 | 74.69 ± 11.75 | 0.600 | ||
Missing value | 1014 (87.11) | ||||
Educational level | Illiterate | 2212 (36.92) | 430 (37.20) | 0.538 | |
Primary school | 2721 (45.41) | 444 (38.41) | |||
Vocational school | 951 (15.87) | 243 (21.02) | |||
College and above | 108 (1.80) | 39 (3.37) | |||
Missing value | 8 (0.69) | ||||
Marital status | Married | 4705 (78.52) | 907 (77.99) | 0.679 | |
Divorced | 1238 (20.66) | 243 (20.89) | |||
Single | 49 (0.82) | 13 (1.18) | |||
Missing value | 1 (0.09) | ||||
Social behavior | Sleep duration (h) | Sleep time | 6.17 ± 2.02 | 6.84 ± 2.32 | < 0.001 |
Missing value | 366 (31.44) | ||||
Smoking | Yes | 2552 (42.59) | 476 (40.96) | 0.253 | |
No | 3440 (57.41) | 686 (59.04) | |||
Missing value | 2 (0.17) | ||||
Alcohol consumption | ≥ 1time/month | 1404 (23.43) | 269 (23.19) | 0.702 | |
<1time/month | 398 (6.64) | 82 (7.07) | |||
No alcohol consumption | 4190 (69.93) | 809 (67.74) | |||
Missing value | 4 (0.26) | ||||
Life satisfaction | Extremely satisfied | 99 (1.65) | 18 (2.69) | 0.831 | |
Very satisfied | 1208 (20.16) | 140 (20.96) | |||
Fairly satisfied | 3940 (65.75) | 435 (65.12) | |||
Not very satisfied | 613 (10.23) | 64 (9.58) | |||
Not at all satisfied | 132 (2.21) | 11 (16.47) | |||
Missing value | 496 (42.61) | ||||
Self-rated health | Very good | 206 (3.44) | 27 (4.62) | 0.300 | |
Good | 750 (12.52) | 99 (16.92) | |||
Fair | 2675 (44.64) | 221 (37.78) | |||
Poor | 1831 (30.56) | 193 (32.99) | |||
Very poor | 530 (8.84) | 45 (7.69) | |||
Missing value | 579 (49.74) | ||||
Number of children | 0 | 1662 (27.74) | 543 (47.47) | 0.416 | |
1 ~ 2 | 3581 (59.76) | 201 (17.57) | |||
3 or more | 749 (12.5) | 400 (34.97) | |||
Missing value | 20 (1.72) | ||||
Long-term care (h) | Formal care | 19.84 ± 72.93 | 22.90 ± 90.52 | < 0.001 | |
Informal care | 7.24 ± 40.96 | 4.46 ± 101.16 | < 0.001 | ||
Missing value | 915 (78.61) |