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Table 1 Demographic characteristics of the three groups

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    
 Range 32–58 20–74 25–63
 Mean ± SD 47.8 ± 8.8 43.7 ± 11.1 43.2 ± 13.4
Sex    
 Male 17 (40.5%) 10 (21.3%) 10 (25%)
 Female 25 (59.5%) 37 (78.7%) 30 (75%)
Smoking status    
 Smokers 15 (35.7%) 5 (10.6%) 8 (20%)
 Non-smokers 27 (64.3%) 42 (89.4%) 32 (80%)
History of raising birds    
 Yes 14 (33.3%) 17 (36.2%)  
 No 28 (66.7%) 30 (63.8%)