Table 1. Lymphyocytic and myeloid leukaemias: age at surgical interventions for adenoidectomy or tonsillectomy.
| Lymphocytic | OR (95% CI) | Myeloid | OR (95% CI) | |
|---|---|---|---|---|
|
Adenoidectomy | ||||
| No | 241/1524 | 1.0 (ref) | 276/1524 | 1.0 (ref) |
| Yes | 20/194 | 0.8 (0.5–1.3) | 37/194 | 1.2 (0.8–1.7) |
|
Age at intervention (y) | ||||
| <10 | 4/103 | 1.0 (ref) | 17/103 | 1.0 |
| 10–20 | 10/52 | 4.2 (1.1–16.2) | 9/52 | 1.0 (0.4–2.2) |
| 20+ | 3/16 | 4.1 (0.2–4.1) | 2/16 | 0.92 (0.2–4.4) |
| Age unknown | 3/23 | 9/23 | ||
|
Tonsillectomy | ||||
| No | 206/1270 | 1.0 (ref) | 244/1270 | 1.0 (ref) |
| Yes | 55/449 | 0.9 (0.7–1.3) | 69/449 | 0.9 (0.6–1.1) |
|
Age at intervention (y) | ||||
| <10 | 15/203 | 1.0 (ref) | 28/203 | 1.0 (ref.) |
| 10–20 | 18/118 | 1.8 (0.8–4.1) | 17/118 | 1.1 (0.6–2.0) |
| 20+ | 15/114 | 1.5 (0.5–4.0) | 16/114 | 1.0 (0.6–2.3) |
| Age unknown | 7/14 | 8/14 | ||
Cases/controls. ORs are age- and gender-adjusted; 95% CI.