Brief Article
Copyright ©2011 Baishideng Publishing Group Co.
World J Gastroenterol. Apr 28, 2011; 17(16): 2131-2136
Published online Apr 28, 2011. doi: 10.3748/wjg.v17.i16.2131
Table 1 Baseline characteristics of cases and controls n (%)
CharacteristicsCases (n = 241)Controls (n = 273)P
Sex (male)181 (75.1)193 (70.7)0.43
Age (yr)57.9 ± 12.956.9 ± 14.10.52
Smoking61 (25.3)39 (14.3)0.014
Residence (rural)111 (46.1)142 (52.0)0.32
Hypertension21 (8.7)28 (10.3)0.58
Diabetes15 (6.2)22 (8.1)0.51