Table 2.
Risk of bacterial complications in the month after diagnosis of URTIs
| No antibiotic treatment | Treated with antibiotics | |||||
| No of episodes | No of complications | Risk per 10 000 | No of episodes | No of complications | Risk per 10 000 | |
| Mastoiditis after AOM | ||||||
| 0–4 | 45 473 | 6 | 1.32 | 243 141 | 23 | 0.95 |
| 5–14 | 21 294 | 3 | 1.41 | 88 741 | 13 | 1.46 |
| 15–64 | 12 676 | 1 | 0.79 | 93 582 | 9 | 0.96 |
| 65+ | 2412 | 0 | − | 7809 | 1 | 1.28 |
| Total* | 81 864 | 10 | 1.22 | 433 273 | 46 | 1.06 |
| Meningitis after AOM | ||||||
| 0–4 | 45 476 | 2 | 0.44 | 243 151 | 1 | 0.04 |
| 5–14 | 21 292 | 1 | 0.47 | 88 746 | 0 | − |
| 15–64 | 12 676 | 1 | 0.79 | 93 581 | 13 | 1.39 |
| 65+ | 2412 | 0 | − | 7808 | 4 | 5.13 |
| Total* | 81 865 | 4 | 0.49 | 433 286 | 18 | 0.42 |
| Peritonsillitis after pharyngotonsillitis | ||||||
| 0–4 | 20 772 | 4 | 1.93 | 116 785 | 15 | 1.28 |
| 5–14 | 44 609 | 57 | 12.8 | 156 170 | 183 | 11.7 |
| 15–64 | 157 178 | 663 | 42.2 | 347 424 | 2340 | 67.4 |
| 65+ | 9167 | 27 | 29.5 | 12 552 | 61 | 48.6 |
| Total† | 231 749 | 751 | 32.4 | 632 933 | 2599 | 41.1 |
| Retropharyngeal and parapharyngeal abscesses after pharyngotonsillitis | ||||||
| 0–4 | 20 772 | 0 | − | 116 811 | 2 | 0.17 |
| 5–14 | 44 585 | 0 | − | 156 332 | 3 | 0.19 |
| 15–64 | 156 805 | 24 | 1.53 | 349 240 | 76 | 2.18 |
| 65+ | 9154 | 4 | 4.37 | 12 627 | 9 | 7.13 |
| Total† | 231 339 | 28 | 1.21 | 635 012 | 90 | 1.42 |
| Invasive group A streptococcal disease after pharyngotonsillitis | ||||||
| 0–4 | 20 772 | 0 | − | 116 811 | 0 | − |
| 5–14 | 44 585 | 0 | − | 156 333 | 2 | 0.13 |
| 15–64 | 156 806 | 4 | 0.26 | 349 255 | 8 | 0.23 |
| 65+ | 9155 | 3 | 3.28 | 12 632 | 1 | 0.79 |
| Total† | 231 341 | 7 | 0.30 | 635 033 | 11 | 0.17 |
| Orbital abscess after sinusitis | ||||||
| 0–4 | 199 | 0 | − | 679 | 0 | − |
| 5–14 | 1791 | 1 | 5.58 | 4333 | 0 | − |
| 15–64 | 54 811 | 0 | − | 181 930 | 1 | 0.05 |
| 65+ | 5637 | 0 | − | 19 832 | 0 | − |
| Total‡ | 62 441 | 1 | 0.16 | 206 774 | 1 | 0.05 |
| Extradural and subdural abscesses after sinusitis | ||||||
| 0–4 | 199 | 0 | − | 679 | 0 | − |
| 5–14 | 1791 | 0 | − | 4333 | 1 | 2.31 |
| 15–64 | 54 811 | 1 | 0.18 | 181 930 | 1 | 0.05 |
| 65+ | 5637 | 0 | − | 19 832 | 0 | − |
| Total‡ | 62 441 | 1 | 0.16 | 206 774 | 2 | 0.10 |
| Acute pansinusitis after sinusitis | ||||||
| 0–4 | 198 | 0 | − | 679 | 0 | − |
| 5–14 | 1790 | 0 | − | 4330 | 1 | 2.31 |
| 15–64 | 54 812 | 7 | 1.28 | 181 923 | 15 | 0.82 |
| 65+ | 5637 | 0 | − | 19 832 | 2 | 1.01 |
| Total‡ | 62 440 | 7 | 1.12 | 206 764 | 18 | 0.87 |
| Acute ethmoidal sinusitis after sinusitis/acute URTIs of multiple and unspecified sites | ||||||
| 0–4 | 419 540 | 39 | 0.93 | 70 887 | 15 | 2.12 |
| 5–14 | 208 157 | 21 | 1.01 | 34 173 | 13 | 3.80 |
| 15–64 | 778 900 | 4 | 0.05 | 347 041 | 6 | 0.17 |
| 65+ | 100 201 | 1 | 0.10 | 56 669 | 0 | − |
| Total§ | 1 506 825 | 65 | 0.43 | 508 770 | 34 | 0.67 |
*Missing information on age for 9 episodes of AOM.
†Missing information on age for 25 episodes of tonsillitis.
‡Missing information on age for 3 episodes of sinusitis.
§Missing information on age for 27 episodes of sinusitis.
AOM, acute otitis media; URTI, upper respiratory tract infection.