HFE (haemochromatosis) gene allelic variant analysis
| Genotype | Controls# | IPF¶ | OR (95% CI) | p-value | |
| WT | WT | 83 (77.6) | 53 (59.6) | 0.43 (0.23–0.792) | 0.745 |
| H63D | WT | 19 (17.8) | 32 (36.0) | 2.60 (1.35–5.02) | 0.004 |
| C282Y | WT | 4 (3.7) | 1 (1.1) | 0.30 (0.32–2.67) | 0.368 |
| S65C | WT | 0 (0.0) | 2 (2.2) | NC | 0.077 |
| H63D | H63D | 0 (0.0) | 1 (1.1) | NC | 0.212 |
| H63D | C282Y | 1 (0.9) | 0 (0.0) | NC | 0.419 |
Data are presented as n (%), unless otherwise stated. IPF: idiopathic pulmonary fibrosis; WT: wild type; NC: not calculated. #: n=107; ¶: n=89.