Predictors of morbidity related to stoma closure after colorectal cancer surgery

Purpose A defunctioning stoma is essential in reducing symptomatic leakage after colorectal surgery, particularly after lower anterior resection. Subsequent stoma closure is associated with morbidity and rarely mortality. This study aimed to identify the risk factors associated with post-operative complications related to stoma closure. Methods This retrospective cohort included patients who have undergone elective stoma closure between 2015 and 2017. Patient demographics, pre-morbidities, use of systemic therapy, stoma characteristics, and post-operative complications were retrieved from electronic records. Univariate and multivariate analysis was carried out to identify risk factors of stoma closure related morbidity. Results Ninety patients were included with a median age of 65 years, of which 58 (64.4%) of them were male. Sixty-nine (76.7%) patients had loop colostomy, while the rest had loop ileostomy. Fifty-four (60%) patients received neoadjuvant or adjuvant therapy. The median time interval from stoma creation to closure was 15 months. Nineteen (21.1%) patients had post-operative complications. The two most commonly observed post-operative complications were wound complications (16.7%) and intra-abdominal collections (6.7%). Fifteen (16.7%) patients developed an incisional hernia. The median follow-up time was 29 months. There was no 30-day mortality in this cohort. In multivariate analysis, adjuvant chemotherapy was associated with a higher risk of wound complications (p = 0.027). Higher risk of incisional hernia was seen in patients with history of hypertension (p = 0.046), use of adjuvant chemotherapy (p = 0.042) and stoma-related complications before closure (p = 0.002). Male patients might be associated with a higher risk of incisional hernia. Conclusion Adjuvant chemotherapy is associated with a higher risk of post-operative complications, particularly with wound complications. Male patients, hypertension, adjuvant chemotherapy, and stoma-related complications are associated with a higher risk of incisional hernia.