**17. Risk factors for surgical failure**

Abdel-Fattah et al (2010) did a randomized report of 341 patients who had an outside-in transobturator (TOT-ARIS) and an inside-out (TVT-O). The risk factors for failure in the insertion of these meshes are: prior incontinence surgery (OR 1.41; 95% CI 1.18, 1.91; P = 0.029), preoperative urgency urinary incontinence (OR 1.78; 95% CI 1.21, 3.91, P = 0.048) during the first year of follow up of these surgeries.

Revicky et al (2011) evaluated the following risk factors to predict failure of the procedure: body mass index (BMI), age, type of analgesia, concomitant prolapse repair or prior surgery and obesity. These factors were not related to bladder injury or to urinary retention. Liu et al (2011) reported that obesity was not a risk factor for surgical failure just like Revicky reported in his review.

When Pushkar et al (2011) evaluated risk factors like age, body mass index and parity; there was no correlation with the complications of TVT and TVT-O.
