2.3. Variables and outcomes
Age and sex of the patients, the type of disease (primary/recurrent),
the number of orifices were recorded. The primary outcome of this study
was the recurrence risk of the PSD after surgery. The secondary outcomes
of the study were, the duration of surgery, the presence of short-term
postoperative complication, and the patient outcomes that were studied
included length of stay in the hospital and wound healing time between
the surgical procedures. The duration of surgery was defined as the time
interval from incision until the dressing is applied. The short-term
postoperative complications were classified as present or absent for
seven days postoperatively, and included seroma, wound site infection
and abscess. We combined the complications as a new variable of having
any type of this complication for using in regression models.