Backgrounds Appendectomy is one of the most commonly performed surgeries worldwide. Sepsis is an major etiology of morbidity and mortality in children. Our preliminary research revealed a positive correlation among appendectomy and future risk of sepsis in adults. However, to date, the relationship among appendectomy and future risk of sepsis in children remains unknown. The aim of this research was to investigate the relationship among appendectomy and hazard of future sepsis in children. Methods We applied a nationwide population-based cohort to assess whether children who received appendectomy were at increased risk of subsequent sepsis. Overall, 57261 subjects aged below 18 undergoing appendectomy as appendectomy group and 57261 matched controls were identified as non-appendectomy group from the National Health Insurance Research Database in Taiwan. We use propensity score analysis to match age, sex, urbanization level, and parental occupation at the ratio to 1:1. Multiple Cox regression and stratified analyses were used to appraise the adjusted hazard ratio (aHR) for developing sepsis in children. Results Children who received appendectomy had a 2.63 times higher risk of developing sepsis than those who did not, and the risk was even higher in children aged under 6 years. Patients with <1 year follow-up showed a 5.64-fold risk of sepsis in the appendectomy cohort. Patients with 1–4 and ≥5 years’ follow-up showed a 2.41- and 2.02-times risk of sepsis. Conclusion Appendectomy was correlative to a 2.63-fold increased future sepsis risk in children, and the risk in younger patients aged <6 years was even higher. More studies to interpret the possible biological mechanisms of the associations among sepsis and appendectomy are warrant

Background: This study evaluated short-term (1-month) and long-term (1-year) mortality risks associated with kidney function measured by estimated glomerular filtration rate (eGFR) levels at admission for patients with intracerebral hemorrhage. Methods: From the Taiwan Stroke Registry data, we identified and stratified patients with intracerebral hemorrhage into 5 subgroups by the eGFR levels at admission: ≥ 90, 60-89, 30-59, 15-29, and < 15 mL/min/1.73m2 or on dialysis from April 2006 to December 2016. Risks of 1-month mortality and 1-year mortality rates after intracerebral hemorrhage were investigated by the eGFR levels. Results: Both the 1-month mortality and 1-year mortality rates increased as the eGFR level decreased. The 1-month mortality rate was over 5-fold greater in patients with eGFR < 15 mL/min/1.73m2 or on dialysis than in patients with eGFR levels ≥ 90 mL/min/1.73m2 (8.31 versus 1.50 per 1000 person-days), with an adjusted hazard ratio (HR) of 4.59 [95% confidence interval (CI) = 2.71-7.78]. Similarly, the 1-year mortality rate was 7.5-fold greater in patients with eGFR < 15 mL/min/1.73m2 or on dialysis than in patients with eGFR ≥ 90 mL/min/1.73m2, with an adjusted HR of 4.54 (95% CI 2.95-6.98). Conclusion: The eGFR level can be an indicator of prognosis for patients with intracerebral hemorrhage.

Aim: The appendix has a complicated immune function, and appendectomy may derange the immune system. Studies on the relationship between appendectomy and subsequent inflammatory bowel disease (IBD) have been inconsistent. We conducted a nationwide cohort study consisting of individuals who underwent appendectomy to evaluate the incidence and risk of ulcerative colitis (UC) and Crohn’s disease (CD). Methods: We identified patients aged >20 years who underwent appendectomy between 2000 and 2012 from inpatient claims of the National Health Insurance Research Database (NHIRD) and assigned them to the appendectomy cohort. Then, we randomly selected patients without appendectomy in the NHIRD and assigned them to the comparison cohort in a frequency-matched 1:1 ratio based on sex, age, and index year. We tracked down all participants until IBD diagnosis, death, or the end of 2013. Cox models were used to estimate the hazard ratio (HR), and 95% confidence intervals (CIs) were used to compare the IBD risk between the appendectomy and comparison cohorts. Results: The appendectomy and comparison cohorts in the study consisted of 246 562 patients each. The appendectomy cohort exhibited a 2.23- and 3.48-fold higher risk of UC (adjusted HR = 2.23, 95% CI = 1.59-3.12) and CD (adjusted HR = 3.48, 95% CI = 2.42-4.99), respectively, than did the comparison cohort. UC and CD risks significantly increased in the appendectomy cohort regardless of whether appendicitis was present. Conclusion: Our study suggests that appendectomy increases UC and CD risks irrespective of appendicitis.