Ann Surg Treat Res.  2021 Jun;100(6):347-355. 10.4174/astr.2021.100.6.347.

Predictive factors for conservative treatment failure of right colonic diverticulitis

  • 1Department of Surgery, Uijeongbu St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
  • 2Department of Surgery, National Health Insurance Service Ilsan Hospital, Goyang, Korea
  • 3Department of Surgery, Hallym University College of Medicine, Chuncheon, Korea
  • 4Department of Surgery, Ajou University School of Medicine, Suwon, Korea


Conservative treatment is the first-line therapy for acute colonic diverticulitis without severe complications, but treatment failure may increase hospitalization duration, medical costs, and morbidities. Usage of the modified Hinchey classification is insufficient to predict the outcome of conservative management. We aimed to investigate the clinical efficacy of the modified Hinchey classification and to evaluate predictive factors such as inflammatory markers for the failure of conservative management.
Patients diagnosed with right colonic diverticulitis undergoing conservative treatment at 3 hospitals between 2017 and 2019 were included. Patients were categorized into conservative treatment success (n = 494) or failure (n = 46) groups. Clinical characteristics and blood inflammatory markers were assessed.
The conservative treatment failure group presented with more elderly patients (>50 years, P = 0.002), more recurrent episodes (P < 0.001), a higher lymphocyte count (P = 0.021), higher C-reactive protein (CRP) levels (P = 0.044), and higher modified Glasgow prognostic scores (P = 0.021). Multivariate analysis revealed that age of >50 years (odds ratio [OR], 2.54; 95% confidence interval [CI], 1.27–5.08; P = 0.008), recurrent episodes (OR, 4.78; 95% CI, 2.38–9.61; P < 0.001), and higher CRP levels (OR, 1.08; 95% CI, 1.03–1.12; P = 0.001) were predictive factors for conservative treatment failure, but not the modified Hinchey grade (P = 0.159).
Age of >50 years, recurrent episodes, and CRP levels are potential predictors for conservative management failure of patients with right-sided colonic diverticulitis. Further studies are warranted to identify candidates requiring early surgical intervention.


Colonic diverticulitis; Conservative treatment; C-reactive protein; Inflammatory response; Recurrence
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