Role of acute diverticulitis in the development of complicated colonic diverticular disease and 1-year mortality after diagnosis in the UK: population-based cohort study. Humes, D. J. & West, J. Gut, 61(1):95--100, January, 2012.
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OBJECTIVE: To determine the risk of developing complicated colonic diverticular disease (CCDD) with prior episodes of acute diverticulitis and determine the mortality of the spectrum of CCDD. DESIGN: Population-based cohort study. SETTING: Computerised records from the General Practice Research Database linked to Hospital Episode Statistics data from the UK. PARTICIPANTS: Patients and controls registered in the General Practice Research Database from 1990 to 2007. MAIN OUTCOME MEASURES: Mortality was calculated and Cox regression modelling used to provide adjusted HRs and 95% CI. Logistic regression was used to model the effect of prior acute diverticulitis on the development of complications. RESULTS: 2950 patients (1872 (63.5%) female) had a diagnosis of CCDD (8739 controls). A total of 1042 (35.3%) patients died compared with 2062 (23.6%) controls. Most excess deaths occurred in the first year after the complication. Patients with a perforation/abscess had a 4.5-fold increase in 1-year mortality (HR 4.55, 95% CI 3.74 to 5.52) compared with the general population, whereas those with a fistula or stricture had a 2.5-fold increase in mortality (fistula HR 2.60, 95% CI 1.47 to 4.62; stricture HR 2.41, 95% CI 1.86 to 3.11). Although most patients (2133 (72.3%)) had suffered no prior episodes of acute diverticulitis, increasing episodes of acute diverticulitis were associated with an increased risk of developing a fistula (two or more prior episodes, OR 1.54 95%, CI 1.08 to 2.19), but there was no clear relationship with stricture or perforation/abscess. CONCLUSIONS: Although most patients have experienced no prior episodes of acute diverticulitis, fistula formation is preceded by bouts of inflammation. Excess 1-year mortality across the spectrum of CCDD compared with the general population is substantial.
@article{humes_role_2012,
	title = {Role of acute diverticulitis in the development of complicated colonic diverticular disease and 1-year mortality after diagnosis in the {UK}: population-based cohort study},
	volume = {61},
	issn = {1468-3288},
	shorttitle = {Role of acute diverticulitis in the development of complicated colonic diverticular disease and 1-year mortality after diagnosis in the {UK}},
	doi = {10.1136/gut.2011.238808},
	abstract = {OBJECTIVE: To determine the risk of developing complicated colonic diverticular disease (CCDD) with prior episodes of acute diverticulitis and determine the mortality of the spectrum of CCDD.
DESIGN: Population-based cohort study.
SETTING: Computerised records from the General Practice Research Database linked to Hospital Episode Statistics data from the UK.
PARTICIPANTS: Patients and controls registered in the General Practice Research Database from 1990 to 2007.
MAIN OUTCOME MEASURES: Mortality was calculated and Cox regression modelling used to provide adjusted HRs and 95\% CI. Logistic regression was used to model the effect of prior acute diverticulitis on the development of complications.
RESULTS: 2950 patients (1872 (63.5\%) female) had a diagnosis of CCDD (8739 controls). A total of 1042 (35.3\%) patients died compared with 2062 (23.6\%) controls. Most excess deaths occurred in the first year after the complication. Patients with a perforation/abscess had a 4.5-fold increase in 1-year mortality (HR 4.55, 95\% CI 3.74 to 5.52) compared with the general population, whereas those with a fistula or stricture had a 2.5-fold increase in mortality (fistula HR 2.60, 95\% CI 1.47 to 4.62; stricture HR 2.41, 95\% CI 1.86 to 3.11). Although most patients (2133 (72.3\%)) had suffered no prior episodes of acute diverticulitis, increasing episodes of acute diverticulitis were associated with an increased risk of developing a fistula (two or more prior episodes, OR 1.54 95\%, CI 1.08 to 2.19), but there was no clear relationship with stricture or perforation/abscess.
CONCLUSIONS: Although most patients have experienced no prior episodes of acute diverticulitis, fistula formation is preceded by bouts of inflammation. Excess 1-year mortality across the spectrum of CCDD compared with the general population is substantial.},
	language = {eng},
	number = {1},
	journal = {Gut},
	author = {Humes, David J. and West, Joe},
	month = jan,
	year = {2012},
	pmid = {21551188},
	keywords = {Acute Disease, Aged, Aged, 80 and over, Case-Control Studies, Cohort Studies, Constriction, Pathologic, Diverticulitis, Colonic, Female, Great Britain, Humans, Intestinal Fistula, Intestinal Obstruction, Intestinal Perforation, Kaplan-Meier Estimate, Logistic Models, Male, Middle Aged, Proportional Hazards Models, Risk, abscess},
	pages = {95--100}
}

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