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Table 2 Characteristics of CD patients and healthy controls in the Chinese Hanpopulation

From: Association between STAT3 gene Polymorphisms and Crohn’s diseasesusceptibility: a case–control study in a Chinese Han population

Characteristics CD patients Control subjects
Number 232 272
Age, mean ± SD (years) 33.6 ± 13.5 46.4 ± 9.8
Age range (years) 20-70 18-70
Male /female 149/83 172/100
Smoking (%) 53 (22.84) 67 (24.63)
Drinking (%) 32 (13.79) 39 (14.34)
Appendectomy (%) 15 (6.47) 18 (6.62)
Family history of CD 0 0