Table 1.
Characteristics of the study cohort according to the procedure type
| Characteristics | Tonsillectomy procedure (n=4104) |
Other procedures (n=8914) |
Overall (n=13 018) |
| Age, years | |||
| Median (IQR) | 5.9 (4.7–7.9) | 4.4 (2.1–7.4) | 5.2 (2.9–7.7) |
| 1–3 | 507 (12.4) | 4034 (45.3) | 4541 (34.9) |
| 4–10 | 3044 (74.2) | 3511 (39.4) | 6555 (50.4) |
| 11–17 | 553 (13.5) | 1369 (15.4) | 1922 (14.8) |
| Sex, male | 2616 (63.7) | 5660 (63.5) | 8276 (63.6) |
| Comorbidity 12 months prior | |||
| Asthma | 1948 (47.5) | 3435 (38.5) | 5383 (41.4) |
| Obesity | 19 (0.5) | 16 (0.2) | 35 (0.3) |
| Type of anaesthesia | |||
| General anaesthesia | 4098 (99.9) | 6585 (73.9) | 10 683 (82.1) |
| Other anaesthesia | 6 (0.2) | 2329 (26.1) | 2335 (17.9) |
| Surgical setting | |||
| Inpatient procedure | 4097 (99.8) | 6357 (71.3) | 10 454 (80.3) |
| Outpatient procedure | 7 (0.2) | 2557 (28.7) | 2564 (19.7) |
| No of beds | |||
| <100 | 108 (2.6) | 2221 (24.9) | 2329 (17.9) |
| ≥100 | 3996 (97.4) | 6693 (75.1) | 10 689 (82.1) |
| Teaching hospital | 558 (13.6) | 1712 (19.2) | 2270 (17.4) |
| Year of surgery | |||
| 2012 | 285 (6.9) | 971 (10.9) | 1256 (9.6) |
| 2013 | 544 (13.3) | 1784 (20.0) | 2328 (17.9) |
| 2014 | 643 (15.7) | 1335 (15.0) | 1978 (15.2) |
| 2015 | 805 (19.6) | 1391 (15.6) | 2196 (16.9) |
| 2016 | 843 (20.5) | 1556 (17.5) | 2399 (18.4) |
| 2017 | 784 (19.1) | 1520 (17.1) | 2304 (17.7) |
| 2018 | 200 (4.9) | 357 (4.0) | 557 (4.3) |
Values are presented as frequencies (%) unless stated otherwise.