Group | Number of cases | Pre-intervention | Post-intervention |
Control group | 30 | 1.45 ± 0.85 | 3.62 ± 0.92 |
Observation group | 30 | 1.51 ± 0.78 | 3.04 ± 0.68 |
t value | 0.042 | 3.285 | |
P value | 0.588 | 0.001 |