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Knowledge of metal health scores
| Group | Baseline | After-training | 6-month | 12-month | b (95%CI) | b ad (95%CI)a |
|---|---|---|---|---|---|---|
| New | 36.58 (12.26) | 55.45 (12.89) | 50.06 (10.12) | 49.87 (11.52) | 5.94 (1.84–10.05)** | 5.75 (1.58–9.93)** |
| Traditional | 35.19 (10.12) | 46.30 (11.54) | 43.09 (11.22) | 43.50 (14.85) |
Intra-class correlation coefficient = 25.86 %
**P < 0.01
aAge, sex, education, marriage status, title and time were controlled. There is not a significant interaction between group and time
