| Result of Wilcoxon test | Expected | Sum ranks | Obs | Sign | |
| Intervention group | p-value = 0.0638 | 312 | 199 | 10 | Positive |
| 312 | 425 | 22 | Negative | ||
| 6 | 6 | 3 | Zero | ||
| 630 | 630 | 35 | Total | ||
| Control group | p-value = 0.6147 | 478.5 | 522.5 | 17 | Positive |
| 478.5 | 434.5 | 16 | Negative | ||
| 78 | 78 | 12 | Zero | ||
| 1035 | 1035 | 45 | Total |