Table 2

Association between melanosis coli and use of anthranoid laxatives

Anthranoid laxative use
Yes (n=78)No (n=476)Odds ratio (95% CI)
Endoscopic melanosis coli 9 (12%)11 (2%)5.5 (2.2–13.7)
Microscopic melanosis coli31 (40%)68 (14%)4.0 (2.4–6.7)
Low grade microscopic melanosis coli17 (22%)53 (11%)2.2 (1.2–4.1)
High grade microscopic melanosis coli14 (18%)15 (3%)6.7 (3.1–14.6)