Hazard ratios of all interstitial lung diseases (ILDs), hypersensitivity pneumonitis and other interstitial lung diseases among pigeon breeders and referents individually matched on sex and year of birth
| Participants | Person-years | Cases | Incidence rate# (95% CI) | Hazard ratio (95% CI) | ||
| Crude¶ | Adjusted¶, § | |||||
| Total population | ||||||
| All ILDs | ||||||
| Pigeon breeders | 6920 | 114 936 | 89 | 77.4 (62.9–95.3) | 1.61 (1.30–1.99) | 1.56 (1.26–1.94) |
| Referents | 276 800 | 4 566 259 | 2281 | 50.0 (47.9–52.0) | 1 | 1 |
| Hypersensitivity pneumonitis | ||||||
| Pigeon breeders | 6920 | 114 936 | 17 | 14.8 (9.2–23.8) | 14.53 (8.21–25.70) | 14.36 (8.10–25.44) |
| Referents | 276 800 | 4 566 259 | 47 | 1.0 (0.8–1.4) | 1 | 1 |
| Other ILDs | ||||||
| Pigeon breeders | 6920 | 114 936 | 72 | 62.6 (49.7–78.9) | 1.33 (1.05–1.68) | 1.33 (1.05–1.69) |
| Referents | 276 800 | 4 566 259 | 2234 | 48.9 (46.9–51.0) | 1 | 1 |
| Inception population | ||||||
| All ILDs | ||||||
| Pigeon breeders | 807 | 5694 | 7 | 122.9 | 4.61 (2.10–10.15) | 4.68 (2.12–10.30) |
| Referents | 32 280 | 226 587 | 58 | 25.6 | 1 | 1 |
Data are presented as n, unless otherwise stated. Results from the total study population and the inception population are presented. The analyses of hypersensitivity pneumonitis and other ILDs, as well as the analyses for the incident members etc. are only adjusted for prescription of medication with ILD as possible side-effect. #: per 100 000 person-years; ¶: adjusted for the matching variables by stratification; §: adjusted for residence, occupation and prescription of drugs with pulmonary fibrosis as possible side-effect.