ต้า✦ Women who undergo an episiotomy are 1.74 times more likely to have anal incontinence than women who do not have an episiotomy (pooled odds ratio [OR], 1.74; 95% confidence interval [CI], 1.28-2.38). Women who sustain a third- or fourth-degree perineal laceration are 2.66 times more likely to have anal incontinence than women who do not have a third- or fourth-degree laceration (pooled OR, 2.66; 95% CI, 1.77-3.98).