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| χ2 | Degree of freedom | p | |
|---|---|---|---|
| Sex | 3.7 | 4 | 0.442 |
| Age | 34.5 | 12 | 0.001 |
| Occupation | 2.9 | 4 | 0.577 |
| Major | 68.4 | 4 | 0.001 |
| Received TCM treatment | 25.5 | 4 | 0.001 |
