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Associations of air pollutant concentrations with longitudinal kidney function changes in patients with chronic kidney disease

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SCIENTIFIC REPORTS
卷 13, 期 1, 页码 -

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NATURE PORTFOLIO
DOI: 10.1038/s41598-023-36682-4

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This longitudinal cohort study found no significant linear and non-linear associations between air pollutant exposures and long-term kidney function changes in patients with chronic kidney disease (CKD).
This longitudinal cohort study investigated the associations of air pollutant exposures, including CO, NO, NO2, NOx, O-3, PM10, PM2.5, and SO2, with long-term kidney function changes in patients with chronic kidney disease (CKD). We enrolled 447 CKD patients who took part in a universal hospital pre-ESRD care program during 2011-2015. The daily average air pollutant exposures and temperature were estimated for each patient, with different levels of air pollutant concentrations defined by 5-knot and restricted cubic spline function. Predicted annual estimated glomerular filtration (eGFR) slope values by one mixed model were considered as the study outcome. The average age of the study population was 77.1 & PLUSMN; 12.6 years, and the median annual eGFR decreased by 2.1 ml/min/1.73 m(2) per year from 30 ml/min/1.73 m(2) at baseline during a mean follow-up time of 3.4 years. The univariable and multivariable analyses revealed no significant linear and non-linear associations between 5-knot air pollutant concentrations and annual eGFR slope. In addition, the visualized spline effect plots show insignificant variation patterns in annual eGFR slope values with increased air pollutant concentrations. These results encourage more extensive studies to clarify the causal relationships and mechanisms of long-term specific air pollutant exposures and longitudinal kidney function change, especially in CKD populations.

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