Odds ratios for quinsy by exposure to antibiotics, following different types of RTI.
| Exposure | Number of case events | Crude odds ratio (95% CI) | Adjusted odds ratio (95% CI)a |
|---|---|---|---|
| No antibiotics after event | 23 | 1.0 | 1.0 |
| Antibiotics given after all events | 169 | 1.3 (0.9 to 2.1) | 1.2 (0.7 to 1.8) |
| Antibiotics given after ‘tonsillitis’ | 81 | 0.8 (0.4 to 1.7) | 0.6 (0.3 to 1.3) |
| Antibiotics given after ‘sore throat/pharyngitis’ | 88 | 1.3 (0.7 to 2.3) | 1.2 (0.7 to 2.2) |
↵a Adjusted for age, sex, smoking, and lung disease at patient level and clustering at practice level. RTI = respiratory tract infection.