Epidemiology and inflammatory bowel diseases

Table 1 The outcome of the study

The study	The outcome
Nakamura et al[4]	Regular consumption of alcohol reduced the risk of ulcerative colitis compared with less frequent use (odds ratio = 0.57, 95%CI: 0.37-0.86)
Jiang et al[7]	Light alcoholic drinking had protective effect against ulcerative colitis and this effect disappeared when smoking associated with the light drinking of alcohol