Dissection technique, haemostasis and rrPTH at baseline and follow-up
| Participating hospitals | Tromsø | Namsos | Trondheim | Molde | Gjøvik | Tønsberg | Haugesund | Total participants |
| Baseline 2017 | ||||||||
| Tonsillectomy cases (n) | 40 | 55 | 209 | 65 | 38 | 102 | 133 | 642 |
| Hot dissection (%) | 82.5 | 96.4 | 95.7 | 26.2 | 60.5 | 100 | 56.4 | 78.3 |
| Cold dissection (%) | 17.5 | 3.6 | 4.3 | 73.8 | 39.5 | 0 | 43.6 | 21.7 |
| Cold dissection and haemostasis (%) | 2.5 | 3.6 | 0.5 | 0 | 2.6 | 0 | 0.8 | 0.9 |
| rrPTH (%) | 11.1 | 18.8 | 15.2 | 16.0 | 25.0 | 17.9 | 21.7 | 17.8 |
| Follow-up 2020 | ||||||||
| Tonsillectomy cases (n) | 56 | 89 | 181 | 118 | 138 | 212 | 143 | 937 |
| Hot dissection (%) | 87.5 | 65.2 | 10.5 | 2.5 | 35.5 | 0.5 | 15.4 | 21.5 |
| Cold dissection (%) | 12.5 | 34.8 | 89.5 | 97.5 | 64.5 | 99.5 | 84.6 | 78.5 |
| Cold dissection and cold haemostasis (%) | 3.6 | 10.1 | 37.0 | 1.1 | 1.4 | 23.6 | 18.9 | 17.0 |
| rrPTH (%) | 8.3 | 10.0 | 6.1 | 9.0 | 4.7 | 5.7 | 6.3 | 6.8 |
| P value for change from hot to cold dissection | 0.84 | <0.01 | <0.01 | <0.01 | <0.01 | <0.01 | <0.01 | <0.01 |
| P value for reduction in rrPTH levels | 0.55 | 0.28 | 0.042 | 0.26 | 0.082 | 0.026 | <0.01 | <0.01 |
rrPTH, readmission rate due to post-tonsillectomy haemorrhage.