Junichi Ishigami1, Morgan E Grams2, Alexander R Chang3, Juan J Carrero4, Josef Coresh1, Kunihiro Matsushita5. 1. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD. 2. Division of Nephrology, Department of Medicine, Johns Hopkins University, Baltimore, MD. 3. Division of Nephrology, Geisinger Health System, Danville, PA. 4. Division of Nephrology, CLINTEC, Karolinska Institutet, Stockholm, Sweden. 5. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD. Electronic address: kmatsush@jhsph.edu.
Abstract
BACKGROUND: Individuals on dialysis therapy have a high risk for infection, but risk for infection in earlier stages of chronic kidney disease has not been comprehensively described. STUDY DESIGN: Observational cohort study. SETTING & PARTICIPANTS: 9,697 participants (aged 53-75 years) in the Atherosclerosis Risk in Communities (ARIC) Study. Participants were followed up from 1996 to 1998 through 2011. PREDICTORS: Estimated glomerular filtration rate (eGFR) and urinary albumin-creatinine ratio (ACR). OUTCOMES: Risk for hospitalization with infection and death during or within 30 days of hospitalization with infection. RESULTS: During follow-up (median, 13.6 years), there were 2,701 incident hospitalizations with infection (incidence rate, 23.6/1,000 person-years) and 523 infection-related deaths. In multivariable analysis, HRs of incident hospitalization with infection as compared to eGFRs≥90mL/min/1.73m2 were 2.55 (95% CI, 1.43-4.55), 1.48 (95% CI, 1.28-1.71), and 1.07 (95% CI, 0.98-1.16) for eGFRs of 15 to 29, 30 to 59, and 60 to 89mL/min/1.73m2, respectively. Corresponding HRs were 3.76 (95% CI, 1.48-9.58), 1.62 (95% CI, 1.20-2.19), and 0.99 (95% CI, 0.80-1.21) for infection-related death. Compared to ACRs<10mg/g, HRs of incident hospitalization with infection were 2.30 (95% CI, 1.81-2.91), 1.56 (95% CI, 1.36-1.78), and 1.34 (95% CI, 1.20-1.50) for ACRs≥300, 30 to 299, and 10 to 29mg/g, respectively. Corresponding HRs were 3.44 (95% CI, 2.28-5.19), 1.57 (95% CI, 1.18-2.09), and 1.39 (95% CI, 1.09-1.78) for infection-related death. Results were consistent when separately assessing risk for pneumonia, kidney and urinary tract infections, bloodstream infections, and cellulitis and when taking into account recurrent episodes of infection. LIMITATIONS: Outcome ascertainment relied on diagnostic codes at time of discharge. CONCLUSIONS: Increasing provider awareness of chronic kidney disease as a risk factor for infection is needed to reduce infection-related morbidity and mortality.
BACKGROUND: Individuals on dialysis therapy have a high risk for infection, but risk for infection in earlier stages of chronic kidney disease has not been comprehensively described. STUDY DESIGN: Observational cohort study. SETTING & PARTICIPANTS: 9,697 participants (aged 53-75 years) in the Atherosclerosis Risk in Communities (ARIC) Study. Participants were followed up from 1996 to 1998 through 2011. PREDICTORS: Estimated glomerular filtration rate (eGFR) and urinary albumin-creatinine ratio (ACR). OUTCOMES: Risk for hospitalization with infection and death during or within 30 days of hospitalization with infection. RESULTS: During follow-up (median, 13.6 years), there were 2,701 incident hospitalizations with infection (incidence rate, 23.6/1,000 person-years) and 523 infection-related deaths. In multivariable analysis, HRs of incident hospitalization with infection as compared to eGFRs≥90mL/min/1.73m2 were 2.55 (95% CI, 1.43-4.55), 1.48 (95% CI, 1.28-1.71), and 1.07 (95% CI, 0.98-1.16) for eGFRs of 15 to 29, 30 to 59, and 60 to 89mL/min/1.73m2, respectively. Corresponding HRs were 3.76 (95% CI, 1.48-9.58), 1.62 (95% CI, 1.20-2.19), and 0.99 (95% CI, 0.80-1.21) for infection-related death. Compared to ACRs<10mg/g, HRs of incident hospitalization with infection were 2.30 (95% CI, 1.81-2.91), 1.56 (95% CI, 1.36-1.78), and 1.34 (95% CI, 1.20-1.50) for ACRs≥300, 30 to 299, and 10 to 29mg/g, respectively. Corresponding HRs were 3.44 (95% CI, 2.28-5.19), 1.57 (95% CI, 1.18-2.09), and 1.39 (95% CI, 1.09-1.78) for infection-related death. Results were consistent when separately assessing risk for pneumonia, kidney and urinary tract infections, bloodstream infections, and cellulitis and when taking into account recurrent episodes of infection. LIMITATIONS: Outcome ascertainment relied on diagnostic codes at time of discharge. CONCLUSIONS: Increasing provider awareness of chronic kidney disease as a risk factor for infection is needed to reduce infection-related morbidity and mortality.
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