International journal of clinical practice · 2021
Risk of non-typhoidal Salmonella infection in patients with cholecystectomy: Results from a nationwide matched cohort study in Taiwan.
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Chin Yen, Yang Kai-Shan, Chang Shu-Han, Cheng-Chung Wei James, Yip Hei-Tung, Hung Yao-Min, Chang Renin
Аннотация
BACKGROUND: The current study was designed to investigate the association between cholecystectomy and the risk of non-typhoidal Salmonella (NTS) infection.
METHODS: We obtained claims-based data from the Taiwan National Health Insurance Research Database (NHIRD) to perform a nationwide cohort study. A propensity score (PS)-matching analysis was performed with a ratio of 1:2 in the cholecystectomy cohort and cholecystectomy-free group to reduce selection bias. Both groups were followed until NTS diagnosis, a dropout from the insurance programme or the end of 2013. Cox proportional hazard regression analysis was used to estimate the hazard ratio (HR) and 95% confidence interval (CI) for the risk of NTS infection between the cholecystectomy and cholecystectomy-free groups.
RESULTS: Our study enrolled 197 444 patients who had undergone cholecystectomy and 394 888 patients who did not receive cholecystectomy. The adjusted HR (aHR) of NTS infection was 1.34 (95% CI, 1.13-1.58; P < .001) for the cholecystectomy group after adjusting for demographical characteristics and relevant comorbidities. The study population is predominantly female patients (55%) and older (58% older than 50 years). The subgroup analysis revealed that both sexes and notably, patients aged >50, who underwent cholecystectomy had a higher risk of NTS infection than the matched controls. Follow-up of patients who underwent cholecystectomy showed that they had a significantly higher risk of NTS infection for more than 6 months after the procedure.
CONCLUSIONS: Our study showed that cholecystectomy might be an independent risk factor for subsequent NTS infection.
METHODS: We obtained claims-based data from the Taiwan National Health Insurance Research Database (NHIRD) to perform a nationwide cohort study. A propensity score (PS)-matching analysis was performed with a ratio of 1:2 in the cholecystectomy cohort and cholecystectomy-free group to reduce selection bias. Both groups were followed until NTS diagnosis, a dropout from the insurance programme or the end of 2013. Cox proportional hazard regression analysis was used to estimate the hazard ratio (HR) and 95% confidence interval (CI) for the risk of NTS infection between the cholecystectomy and cholecystectomy-free groups.
RESULTS: Our study enrolled 197 444 patients who had undergone cholecystectomy and 394 888 patients who did not receive cholecystectomy. The adjusted HR (aHR) of NTS infection was 1.34 (95% CI, 1.13-1.58; P < .001) for the cholecystectomy group after adjusting for demographical characteristics and relevant comorbidities. The study population is predominantly female patients (55%) and older (58% older than 50 years). The subgroup analysis revealed that both sexes and notably, patients aged >50, who underwent cholecystectomy had a higher risk of NTS infection than the matched controls. Follow-up of patients who underwent cholecystectomy showed that they had a significantly higher risk of NTS infection for more than 6 months after the procedure.
CONCLUSIONS: Our study showed that cholecystectomy might be an independent risk factor for subsequent NTS infection.