Table 1 Descriptive statistics of all participants.
Characteristics | Total | Male | Female | P |
|---|---|---|---|---|
N | 1326 | 518 | 808 | |
Age (yr), mean (SD) | 71.99 (7.06) | 74.30 (6.84) | 70.51 (6.80) | < 0.001 |
Height (cm), mean (SD) | 162.38 (7.78) | 168.67 (6.25) | 158.35 (5.71) | < 0.001 |
Weight (kg), mean (SD) | 63.52 (9.86) | 68.48 (9.84) | 60.35 (8.47) | < 0.001 |
Body mass index (kg/m2), mean (SD) | 24.07 (3.20) | 24.06 (3.13) | 24.08 (3.25) | 0.896 |
Annual household income, N (%) | < 0.001 | |||
≤ 10,000 yuan | 434 (32.7) | 141 (27.2) | 293 (36.3) | |
20,000 ~ 40,000 yuan | 229 (17.3) | 80(15.4) | 149 (18.4) | |
50,000 ~ 80,000 yuan | 319 (24.1) | 120 (23.2) | 199 (24.6) | |
90,000 ~ 150,000 yuan | 269 (20.3) | 136 (26.3) | 133 (16.5) | |
≥ 160,000 yuan | 75 (5.7) | 41 (7.9) | 34 (4.2) | |
Education level, N (%) | < 0.001 | |||
Below elementary | 2 (0.2) | 0 (0) | 2 (0.2) | |
Elementary school | 20 (1.5) | 9 (1.7) | 11 (1.4) | |
Middle school | 241 (18.2) | 84 (16.2) | 157 (19.4) | |
High school | 328 (24.7) | 78 (15.1) | 250 (30.9) | |
College | 669 (50.5) | 295 (56.9) | 374 (46.3) | |
Graduate | 66 (5.0) | 52 (10.0) | 14 (1.7) | |
Smoking, N (%) | < 0.001 | |||
Current smoker | 98 (7.4) | 77 (14.9) | 21 (2.6) | |
Current nonsmoker | 1228 (92.6) | 441 (85.1) | 787 (97.4) | |
Drinking, N (%) | < 0.001 | |||
Current drinker | 106 (8.0) | 91 (17.6) | 15 (1.9) | |
Current nondrinker | 1220 (92.0) | 427 (82.4) | 793 (98.1) |
