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Raw OR is 8.89; in urban area is 4.58 and in rural area is 19.5. Although in both areas was modify the OR, it follow being statistical significative. Mantel Haenzsel OR is 7.4; this is meaning that residence area is a confounder for the association between quinfamide and non-carrier of E. histolytic. Controlling by residence area, disminish estimate of OR; residence area is a positive confounder. |