Degree of effectiveness as reported by the professionals about the arguments for convincing the patient that the treatment or procedure is unnecessary
| Argument | General practitioners n=936 | Paediatricians n=682 | Nurses n=286 | Total n=1904 | Χ2 | P Values |
| N (%) | N (%) | N (%) | N (%) | |||
| Patient safety | 361 (38.6) | 311 (45.6) | 106 (37.1) | 778 (40.9) | 23.9 | 0.000 |
| Clinical reasons based on knowledge | 352 (37.6) | 297 (43.5) | 102 (35.7) | 751 (39.4) | 9.8 | 0.043 |
| The result is achieved by other procedures | 320 (34.2) | 254 (37.2) | 91 (31.8) | 665 (34.9) | 8.2 | 0.085 |
| Saves patient discomfort | 119 (12.7) | 144 (21.1) | 65 (22.7) | 328 (17.2) | 44.7 | 0.000 |
| Saves time and money that has a positive effect on other patients | 68 (7.3) | 29 (4.3) | 32 (11.2) | 129 (6.8) | 32.3 | 0.000 |
High and Very High degrees of effectiveness shown.