Risk of epiglottitis in the ESRD and control group
| ESRD | Controls | IRR (95% CI) | P value | |||||||
| N | Epiglottitis | PYs | Rate | N | Epiglottitis | PYs | Rate* | |||
| Overall | 80 636 | 52 | 503 377.8 | 10.3 | 80 636 | 35 | 657 428.1 | 5.3 | 1.94 (1.26 to 2.98) | <0.01 |
| Follow-up period (years) | ||||||||||
| <1 | 80 636 | 5 | 78 645.2 | 6.4 | 80 636 | 3 | 80 223.4 | 3.7 | 1.70 (0.41 to 7.11) | 0.46 |
| 1–5 | 75 714 | 36 | 244 619.1 | 14.7 | 79 561 | 15 | 287 934.1 | 5.2 | 2.83 (1.55 to 5.16) | <0.01 |
| >5 | 45 782 | 11 | 180 113.6 | 6.1 | 61 648 | 17 | 289 270.7 | 5.9 | 1.04 (0.49 to 2.22) | 0.92 |
*Per 100 000 PYs; IRR was compared using Poisson regression.
ESRD, end-stage renal disease; PYs, person-years; IRR, incidence rate ratio.