Baseline demographics
| Index | Experimental group | Control group | P value |
| Age, years | |||
| Number of cases (number of missing) | 128 (0) | 130 (0) | 0.4903 |
| Mean±SD | 53.82±9.97 | 54.72±10.99 | |
| Sex, n (%) | |||
| Number of cases (number of missing) | 128 (0) | 130 (0) | 0.1987 |
| Male | 48 (37.50) | 59 (45.38) | |
| Female | 80 (62.50) | 71 (54.62) | |
| Nationality, n (%) | |||
| Number of cases (number of missing) | 128 (0) | 130 (0) | 0.0592 |
| Han nationality | 124 (96.88) | 130 (100.0) | |
| Others | 4 (3.13) | 0 (0.00) | |
| Height (cm) | |||
| Number of cases (number of missing) | 119(9) | 122(8) | 0.9883 |
| Mean±SD | 165.93±7.73 | 165.92±7.87 | |
| Weight (Kg) | |||
| Number of cases (number of missing) | 119(9) | 123(7) | 0.1134 |
| Mean±SD | 70.99±10.61 | 68.66±12.15 | |
| BMI (Kg/m2） | |||
| Number of cases (number of missing) | 119(9) | 122(8) | 0.0362 |
| Mean±SD | 25.74±3.12 | 24.85±3.38 | |
BMI, body mass index.