Selective association of nonaspirin NSAIDs with risk of diverticulitis

Purpose The purpose of this study is to investigate the association of intake of nonsteroidal anti-inflammatory drugs (NSAIDs) and in particular nonaspirin NSAIDs and compare it with other risk factors for the progression of diverticulosis to diverticulitis in patients who underwent colonoscopy. Methods A total of 194 patients who underwent complete colonoscopy in our center between 2012 and 2016 were recruited: 144 with diverticulosis without prior diverticulitis (median age 71 years, 59.7% men) and 50 with diverticulitis (median age 64 years, 54.0% men). Data concerning current and previous medication as well as concomitant diseases were collected using a structured questionnaire and by revision of patients medical charts. Results Patients with diverticulitis were significantly ( p < 0.001) younger as compared to individuals with plain diverticulosis (median age 64 versus 71 years, respectively). The intake of NSAIDs significantly ( p = 0.002) increased the risk of prior diverticulitis (OR 3.2, 95% CI 1.5–6.9). In the multivariate model, both age ( p < 0.001) and NSAIDs ( p = 0.03) proved to be independent determinants of diverticulitis. When analyzing aspirin intake, it was not associated with diverticulitis. Conclusions Our study demonstrates, in line with previous reports, that intake of NSAIDs is associated with diverticulitis. We show in particular that nonaspirin NSAIDs might be selectively associated with diverticulitis. These results point to divergent role of aspirin and nonaspirin NSAIDs in the development of diverticulitis.