Table 4.
Basic characteristics of participants in baseline of Westlake BioBank for Chinese pilot
| Variables(unit) | Total | Sex | *P value | ||
| Male | Female | ||||
| Sociodemographic | |||||
| Age (years) | N† | 14 726 | 4751 | 9975 | 0.001 |
| M (SD)‡ | 18.5 (1.3) | 18.6 (1.2) | 18.5 (1.3) | ||
| Gender | N (%)§ | 14 726 (100) | 4751 (32.3) | 9975 (67.7) | <0.001 |
| Ethnicity | 0.305 | ||||
| Han | N (%) | 11136 (97.8) | 3642 (98.0) | 7494 (97.7) | |
| Others | N (%) | 253 (2.2) | 75 (2.0) | 178 (2.3) | |
| Hukou status | <0.001 | ||||
| Rural | N (%) | 5951 (66.6) | 1739 (60.2) | 4212 (69.6) | |
| Urban | N (%) | 2986 (33.4) | 1148 (39.8) | 1838 (30.4) | |
| Anthropometry | |||||
| Height (cm) | N | 14277 | 4588 | 9689 | <0.001 |
| M (SD) | 164.2 (8.5) | 172.9 (6.6) | 160.1 (5.8) | ||
| Weight (kg) | N | 14279 | 4587 | 9692 | <0.001 |
| M (SD) | 57.01 (12.32) | 65.81 (13.60) | 52.85 (9.07) | ||
| Waist (cm) | N | 12 396 | 3905 | 8491 | <0.001 |
| M (SD) | 71.7 (9.8) | 75.5 (11.1) | 69.9 (8.7) | ||
| Hip (cm) | N | 12388 | 3902 | 8486 | <0.001 |
| M (SD) | 89.8 (7.3) | 90.8 (8.3) | 89.3 (6.7) | ||
| Thigh (cm) | N | 12351 | 3880 | 8471 | 0.102 |
| M (SD) | 51.7 (5.7) | 51.6 (6.5) | 51.7 (5.3) | ||
| Cardiovascular system | |||||
| SBP (mm Hg) | N | 14277 | 4595 | 9682 | <0.001 |
| M (SD) | 113 (12) | 121 (12) | 110 (11) | ||
| DBP (mm Hg) | N | 14276 | 4595 | 9681 | <0.001 |
| M (SD) | 71 (9) | 73 (9) | 70 (8) | ||
| Heart rate (beats/min) | N | 14295 | 4599 | 9696 | <0.001 |
| M (SD) | 86 (13) | 83 (13) | 87 (13) | ||
| Lifestyle | |||||
| Smoking | N (%) | 435 (5.9) | 350 (16.3) | 85 (1.6) | <0.001 |
| Alcohol status | N (%) | 2844 (38.8) | 1333 (62.0) | 1511 (29.2 | <0.001 |
| Sleeping time (hours) | N | 7247 | 2115 | 5132 | |
| M (SD) | 8.2 (1.4) | 8.0 (1.3) | 8.3 (1.4) | <0.001 | |
| Grip strength (kg) | |||||
| Left hand | N | 8932 | 2958 | 5974 | <0.001 |
| M (SD) | 27.38 (8.77) | 36.66 (7.53) | 22.79 (4.82) | ||
| Right hand | N | 8941 | 2967 | 5974 | <0.001 |
| M (SD) | 29.76 (9.66) | 39.90 (8.32) | 24.72 (5.35) | ||
| BMD (g/cm2) | |||||
| Lumar spine | N | 10154 | 3293 | 6861 | <0.001 |
| M (SD) | 0.910 (0.105) | 0.926 (0.112) | 0.903 (0.100) | ||
| Total hip | N | 10160 | 3296 | 6864 | <0.001 |
| M (SD) | 0.868 (0.127) | 0.932 (0.139) | 0.837 (0.108) | ||
| Femoral neck | N | 10160 | 3296 | 6864 | <0.001 |
| M (SD) | 0.778 (0.125) | 0.846 (0.138) | 0.746 (0.104) | ||
| Forearm | N | 9917 | 3238 | 6679 | <0.001 |
| M (SD) | 0.657 (0.059) | 0.705 (0.057) | 0.634 (0.453) | ||
*T-test and χ2 tests for continuous and categorical variables, respectively, to refer the significant differences between males and females.
†N: sample size.
‡M (SD): mean (SD).
§N (%): sample size (percentage).
DBP, diastolic blood pressure; SBP, systolic blood pressure.