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Background Little is known about the health sequelae of pneumonia in persons with chronic kidney disease (CKD). Methods We studied adults with CKD in Stockholm during 2006–11, who not previously been diagnosed with lower respiratory tract infections. We used multivariable-adjusted Cox regression with pneumonia as a time-varying exposure to estimate hazard ratios (HRs) [95% confidence intervals (CIs)] for the events of death, major adverse cardiovascular events (MACEs), acute kidney injury (AKI), CKD progression or hospitalization for urinary tract infections (UTIs)/sepsis. Cataract and knee/joint replacement served as negative control outcomes. Results We identified 71 931 adults (mean age 79 years, 59% women), of whom 8379 (12%) were diagnosed with pneumonia during follow-up; incident pneumonia was associated with 10 times higher adjusted mortality risk during the first 90 days [HR = 10.0, 95% confidence interval (CI) 9.5–10.5] and double the mortality beyond 90 days from pneumonia diagnosis (HR = 2.0; 95% CI 1.9–2.1). Incident pneumonia was similarly associated with higher adjusted risk of MACE (<90 days: HR = 12.6; 95% CI 12.0–13.3; ≥90 days: HR = 1.5; 95% CI 1.4–1.6). The adjusted risk of CKD progression and UTI/sepsis hospitalization was highest within 90 days from pneumonia but remained elevated thereafter. For AKI, the association with incident pneumonia was only seen within 90 days. Neither cataract nor knee/joint replacement was related to pneumonia. Conclusions Incident pneumonia was associated with increased risks of MACE, CKD progression, severe UTI/sepsis and death, with risks highest soon after pneumonia diagnosis but extending beyond 90 days. Our findings highlight the susceptibility for adverse outcomes of CKD patients following pneumonia diagnosis, and may inform clinical decisions regarding vaccination strategies. [ABSTRACT FROM AUTHOR]

Aims: The cardiorenal syndrome refers to a bidirectional relationship between the kidney and the heart. However, epidemiological evidence of cardiovascular disease (CVD) as a risk factor for chronic kidney disease (CKD) progression is actually scarce. Methods and results: We examined the slopes of estimated glomerular filtration rate (eGFR) decline in the 2 years before vs. after an incident hospitalization with heart failure (HF) (n = 20 420), coronary heart disease (CHD) (n = 18 152), or stroke (n = 1808) using data from a complete laboratory data collection in Stockholm, Sweden between 2006 and 2011. eGFR slopes were estimated using mixed‐effect models with unstructured residual correlation. Overall, incident hospitalization with HF and CHD, but not stroke, was significantly associated with a subsequent accelerated decline in eGFR, with a faster eGFR decline and greater slope change after HF than CHD. The pre‐event vs. post‐event eGFR slopes (mL/min/1.73 m2 per year) were −1.67 (−1.77 to −1.57) vs. −2.76 (−2.82 to −2.71), with a Δslope of −1.09 (−1.16 to −1.02) for HF; −1.09 (−1.20 to −0.98) vs. −1.87 (−1.92 to −1.81), with a Δslope of −0.78 (−0.85 to −0.70) for CHD; and −1.00 (−1.37 to −0.63) vs. −0.99 (−1.19 to −0.78), with a Δslope of 0.02 (−0.24 to 0.27) for stroke. The accelerated declines in eGFR after HF and CHD were consistent across the spectrum of eGFR, although pre‐event eGFR slopes were steeper in lower eGFR (e.g. pre‐event eGFR slope for HF −0.64 (−0.76 to −0.53) for eGFR ≥60 mL/min/1.73 m2, −1.43 (−1.57 to −1.30) for eGFR 30–59 mL/min/1.73 m2, and −2.42 (−2.71 to −2.12) for eGFR <30 mL/min/1.73 m2). Conclusions: Incident hospitalization with cardiac diseases (i.e. HF and CHD) was significantly associated with a subsequent acceleration of eGFR decline. [ABSTRACT FROM AUTHOR]