Table 3. Comparison of pre-test and post-test mean respiratory symptoms and depression scores within and between the control and intervention groups .
| Variables | Control group | Intervention group | |||||
| Before | After | Within | Before | After | Within | Between | |
| Mean (SD) | Mean(SD) | P value | Mean (SD) | Mean (SD) | P value | P value | |
| St George Respiratory Questionnaire (SGRQ) | 29.30 (15.53) | 31.25 (13.89) | 0.064 | 28.75 (20.83) | 18.71 (12.51) | 0.001 | 0.001 |
| Becks Depression Inventory (BDI) | 10.06 (5.96) | 8.33 (5.80) | 0.852 | 10.33 (6.48) | 3.50 (1.27) | 0.001 | 0.001 |