Level | Number of cases | Pre-intervention | Post-intervention |
Control group | 50 | 61.35 ± 13.68 | 61.92 ± 15.01 |
Observation group | 50 | 62.78 ± 14.11 | 69.61 ± 9.89 |
t |
| −2.57 | −0.32 |
P |
| 0.028 | 0.633 |