Materials and methods
MUI, urinary incontinence
URINARY INCONTINENCE
This work is a 16-year follow-up study evaluating the long-term benefits of MUS surgery compared with a previous prospective randomized controlled study on 100 women suffering from SUI or MUI with a predominant stress component. The original study protocol was approved by the regional ethics committee and the present study has approval of the hospital district of Northern Ostrobothnia, Finland (124/2020). All the women underwent surgery at the Department of Obstetrics and Gynecology at Oulu University Hospital between January 2004 and November 2006 [Preoperative urinary incontinence was evaluated with two internationally standardized and validated questionnaires: the UISS and Detrusor Instability Score (DIS) [For this long-term follow-up study, we attempted to recruit all patients from the original prospective randomized study. Of the 100 patients, 3 were deceased during follow-up (3 in the TVT group and 0 in the TOT group). Patients were contacted by postal letter, or by phone if there was no response to the letter. Long-term follow-up data were collected using the same internationally standardized and validated questionnaires (UISS and DIS) as preoperatively. The effect of surgery on well-being was measured with the PGI-I questionnaire [The IBM SPSS Statistics version 28 was used for the statistical analysis. Continuous variables were calculated as means or medians with standard deviations or interquartile range, and categorical variables were calculated as frequencies. The differences in continuous variables were analyzed using an independent samples 