# Clostridium difficile infection after stoma reversal surgery: a systematic review and meta-analysis of the literature

## TL;DR

This study finds that about 2.1% of patients develop Clostridium difficile infection after stoma reversal surgery, with adjuvant therapy possibly increasing the risk.

## Contribution

The study provides the first systematic review and meta-analysis on the incidence and risk factors of CDI after stoma reversal.

## Key findings

- CDI occurs in approximately 2.1% of patients after stoma reversal.
- Adjuvant therapy was associated with a higher risk of CDI in meta-analysis.
- No significant differences in age, sex, or time to stoma reversal were found between CDI and non-CDI patients.

## Abstract

Clostridium difficile infection (CDI) has been described in the early post-operative phase after stoma reversal. This systematic review aimed to describe the incidence of CDI after stoma reversal and to identify pre-operative variables correlated with an increased risk of infection.

A systematic review of the literature was conducted according to the PRISMA guidelines in March 2024. Manuscripts were included if reported at least one patient with CDI-associated diarrhoea following stoma reversal (colostomy/ileostomy). The primary outcome of interest was the incidence of CDI; the secondary outcome was the comparison of clinical variables (age, sex, time to stoma reversal, neo-adjuvant and adjuvant therapies after index colorectal procedure) in CDI-positive versus CDI-negative patients. A meta-analysis was performed when at least three studies reported on those variables.

Out of 43 eligible manuscripts, 1 randomized controlled trial and 10 retrospective studies were selected, including 17,857 patients (2.1% CDI). Overall, the mean age was 64.3 ± 11.6 years in the CDI group and 61.5 ± 12.6 years in the CDI-negative group (p = 0.51), with no significant difference in sex (p = 0.34). Univariable analyses documented that the mean time to stoma reversal was 53.9 ± 19.1 weeks in CDI patients and 39.8 ± 15.0 weeks in CDI-negative patients (p = 0.40) and a correlation between neo-adjuvant and adjuvant treatments with CDI (p < 0.001). A meta-analysis was performed for time to stoma reversal, age, sex, and neo-adjuvant therapies disclosing no significant differences for CDI (stoma delay, MD 11.59; 95%CI  24.32–1.13; age, MD 0.97; 95%CI 2.08–4.03; sex, OR1.11; 95%CI 0.88–1.41; neo-adjuvant, OR0.81; 95%CI 0.49–1.35). Meta-analysis including patients who underwent adjuvant therapy evidenced a higher risk of CDI (OR 2.88; 95%CI 1.01–8.17, p = 0.11).

CDI occurs in approximately 2.1% of patients after stoma reversal. Although a trend of increased delay in stoma reversal and a correlation with chemotherapy were documented in CDI patients, the use of adjuvant therapy was the only possible risk factor documented on meta-analysis.

CRD42023484704

The online version contains supplementary material available at 10.1007/s00384-024-04643-6.