| feature | Observation group (n = 90) | Control group (n = 80) | t/x2 | P值 |
| gender |
|
| 0.191 | 0.662 |
| male | 24 (26.7) | 19 (23.7) |
|
|
| Female | 66 (73.3) | 61 (76.3) |
|
|
| Age (year) | 50.02 ± 10.93 | 52.50 ± 12.98 | 1.336 | 0.183 |
| BMI (kg/m2) | 22.37 ± 3.07 | 22.43 ± 3.00 | 0.139 | 0.890 |