| Constitutional type | The number of cases (N) | Onset age: |
| Constitution of qi stagnation | 27 | 57.05 ± 8.51 |
| Constitution of yang asthenia | 13 | 59.03 ± 10.73 |
| Constitution of qi asthenia | 22 | 58.00 ± 11.01 |
| Constitution of blood stasis | 17 | 58.30 ± 9.03 |
| Constitution of yin-yang harmony | 2 | 57.00 ± 8.23 |
| Constitution of yin asthenia | 22 | 59.24 ± 9.13 |
| Constitution of phlegm-dampness | 11 | 60.79 ± 10.04 |
| Constitution of damp-heat | 20 | 59.46 ± 9.31 |
| Allergic constitution | 4 | 57.35 ± 10.26 |