Table 5 Perceived Stress Scale (PSS) pre- and post- RDIF according to sex and academic yeara
| Â | Pre-RDIF Mean (SD) | Post-RDIF Mean (SD) | Change score | P-value |
|---|---|---|---|---|
Overall | 20.18 (5.44) | 21.84 (5.48) | 1.66 |  < 0.01 |
Sex | ||||
 Female | 20.85 (5.36) | 21.62 (4.96) | 0.77 | NS |
 Male | 19.52 (5.47) | 22.05 (5.95) | 2.53 |  < 0.01 |
Academic year | ||||
 First | 21.41 (4.80) | 21.97 (4.95) | 0.56 | NS |
 Second | 20.33 (5.67) | 21.98 (5.18) | 1.65 | NS |
 Third | 19.51 (5.93) | 21.16 (6.17) | 1.65 | NS |
 Fourth | 21.40 (3.64) | 24.80 (4.83) | 3.40 |  < 0.05 |
 Fifth | 17.73 (5.90) | 21.31 (6.01) | 3.58 |  < 0.05 |
 Sixth | 20.00 (3.41) | 20.33 (5.01) | 0.33 | NS |