As the world's most populated and rapidly aging country, there is limited information on sex-related differences in factors regarding uncomplicated colonic diverticulosis in China. We aimed to investigate sex differences in individual risk factor in a northern metropolis. Patients with colonic diverticulosis who underwent indicated colonoscopy were queried with respect to medical history and demographic features. Demographic information, life style factors and co-morbidities were retrieved from a prospective dataset. Multiple regression analyses were performed to determine precipitating factors of diverticula. Of 4,386 enrolled patients, colonic diverticulosis were detected in 218 cases (4.97%). Multiple logistic regression analysis implicated increasing age (OR = 1.05, 95%CI 1.03-1.06, P < 0.001), red meat ≥100 g/d (OR = 2.53, 95%CI 1.72-3.70, P < 0.001), smoking (OR = 2.14, 95%CI 1.05-4.33, P = 0.035), rheumatologic diseases (OR = 3.38, 95%CI 1.09-10.5, P = 0.035) and NSAIDs (OR = 2.11, 95%CI 1.12-3.97, P = 0.020) were significantly associated with diverticulosis in men, whilst advancing age (OR = 1.03, 95%CI 1.01-1.05, P = 0.013), BMI (OR = 1.12, 95%CI 1.04-1.19, P = 0.001), smoking (OR = 10.2, 95%CI 2.81-37.4, P < 0.001), rheumatologic diseases (OR = 8.04, 95%CI 3.05-21.2, P < 0.001), hypertension (OR = 1.76, 95%CI 1.01-3.06, P = 0.047), colonic polyps (OR = 3.12, 95%CI 1.82-5.36, P < 0.001) and antihypertensive medications (OR = 2.99, 95%CI 1.66-5.39, P < 0.001) in women. In conclusion, it is pivotal to take account of differentially sex-related factors in regard to the development of uncomplicated colonic diverticulosis.China has underwent rapid growth of aging population during recent decades; those aged ≥ 75 years accounted for 3.5% of the population in 2013, and there were 200 million elderly residents aged ≥ 65 years in 20141 . Therefore the burden of diseases, especially entity with a higher prevalence among the elderly, including uncomplicated colonic diverticulosis, is predicted to increase in the future 2,3 . As a matter of fact, the rates of diverticula have dramatically increased from 2.78% in 2011 to 4.98% in 2015 according to dataset from our endoscopy center (data not shown). Aside from aging, the pathogenesis of diverticulosis is thought to be multifactorial, including diet, colonic motility, obesity, medications and genetic factors 4 . More recently, it has been recognized that altered gut microbiota composition and abnormal immune signatures may contribute to the development and progression of uncomplicated diverticular disease 5,6 . Of note, explicit sex-specific diet-microbiota correlations have been documented in humans 7 . After reviewing current body of literature, gender was evidently associated with the presence of diverticulosis 5,[8][9][10] . Thus, it is plausible to hypothesize that sex-related differences regarding risk factors for the formation of diverticula. Collectively, we aimed to assess potential factors related to diverticulosis by capturing and analyzing demographic, env...