Demographics, dissection and haemostasis for tonsillectomy at baseline and follow-up
| Tonsillectomy | Tromsø | Namsos | Trondheim | Molde | Gjøvik | Tønsberg | Haugesund | Total participants |
| Baseline 2017 | ||||||||
| Tonsillectomy cases (n) | 40 | 55 | 209 | 65 | 38 | 102 | 133 | 642 |
| Sex male/female (n) | 16/24 | 20/35 | 101/108 | 35/30 | 11/27 | 45/57 | 51/82 | 279/363 |
| Age males (SD) | 12.5 (11.5) | 15.6 (13.6) | 14.5 (13.2) | 18.6 (9.7) | 19.9 (16.5) | 14.7 (11.6) | 14.1 (10.9) | 15.1 (12.4) |
| Age females (SD) | 18.2 (9.4) | 19.2 (9.5) | 16.9 (12.5) | 17.3 (7.8) | 18.1 (11.1) | 20.1 (13.9) | 18.7 (11.5) | 18.2 (11.7) |
| 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 |
| Follow-up 2020 | ||||||||
| Tonsillectomy cases (n) | 56 | 89 | 181 | 118 | 138 | 212 | 143 | 937 |
| Sex male/female (n) | 20/36 | 26/63 | 55/126 | 42/76 | 39/99 | 94/118 | 65/78 | 341/596 |
| Age males (SD) | 15.0 (10.4) | 16.6 (9.1) | 19.7 (13.5) | 18.7 (10.5) | 19.6 (15.3) | 17.0 (13.4) | 14.9 (10.0) | 17.4 (12.4) |
| Age females (SD) | 18.9 (18.1) | 21.2 (10.6) | 20.0 (11.0) | 19.8 (9.6) | 23.0 (12.9) | 20.1 (11.9) | 17.0 (9.8) | 20.1 (11.8) |
| 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 |
| P value for change from hot to cold dissection baseline to follow-up | 0.84 | <0.01 | <0.01 | <0.01 | <0.01 | <0.01 | <0.01 | <0.01 |
Age is presented as mean (SD).