| Result of Wilcoxon test | Expected | Sum ranks | Obs | Group |
| p-value = 0.0424 | 1417.5 | 1208.5 | 35 | Case |
| 1822.5 | 2031.5 | 45 | Control | |
| 3240 | 3240 | 80 | Total | |
| N | SD | Mean | Group | |
| 35 | 7.698303 | 40.82857 | Case | |
| 45 | 6.367135 | 44.22222 | Control | |
| 80 | 7.138315 | 42.7375 | Total |