Table 1

Subject characteristics

Controls (n=1346) Hypothyroidism (n=124) IBD (n=64)
Values for age and pack years of smoking are mean (SD). Mean for pack years does not include non-smokers.
IBD=inflammatory bowel disease.
Male (%) 668 (50) 18 (15) 29 (45)
Age (years) 56 (12) 56 (14) 45 (14)
Smoking
    Never (%) 679 (50) 62 (50) 30 (47)
    Current (%) 155 (12) 11 (9) 11 (17)
    Ex-smokers (%) 512 (38) 51 (41) 23 (36)
    Pack years 19 (21) 18 (18) 17 (13)