From: A preliminary study: MUC5B promoter polymorphism and its association with IPF
 | IPF patients (group I) (n = 42) | Other ILD patients (group II) (n = 47) | Control subjects (group III) (n = 40) |
---|---|---|---|
Age, years | Â | Â | Â |
 Range | 32–58 | 20–74 | 25–63 |
 Mean ± SD | 47.8 ± 8.8 | 43.7 ± 11.1 | 43.2 ± 13.4 |
Sex | Â | Â | Â |
 Male | 17 (40.5%) | 10 (21.3%) | 10 (25%) |
 Female | 25 (59.5%) | 37 (78.7%) | 30 (75%) |
Smoking status | Â | Â | Â |
 Smokers | 15 (35.7%) | 5 (10.6%) | 8 (20%) |
 Non-smokers | 27 (64.3%) | 42 (89.4%) | 32 (80%) |
History of raising birds | Â | Â | Â |
 Yes | 14 (33.3%) | 17 (36.2%) |  |
 No | 28 (66.7%) | 30 (63.8%) |  |