Relationship of Forced Vital Capacity with Chronic Kidney Disease among Middle-Aged and Elder Korean Men

ABSTRACT

BACKGROUND: It is unclear whether impaired pulmonary function serves as a risk factor for decreased renal function. This study investigated the association between the forced vital capacity (FVC) and chronic kidney disease (CKD) in middle-aged and elderly men.METHODS: We investigated the association between FVC and CKD in 412 Korean men aged ≥50 years, without diabetes, who have not received treatment for chronic lung disease. CKD was defined based on evidence of renal tissue damage or reduced renal function indicated by estimated glomerular filtration rate < 60 mL/min/1.73 m² or proteinuria level ≥1+. We assessed the association between FVC and CKD using multivariate logistic regression analysis after adjusting for confounders.RESULTS: The overall prevalence of CKD was 29.2% in the study population. Multivariate logistic regression analysis showed that the odds ratio with a 95% confidence interval for CKD was 0.96 (0.92–0.99) with a 1% increment in FVC after adjusting for age, body mass index, smoking status, alcohol intake, regular exercise, systolic and diastolic blood pressures, fasting plasma glucose, triglyceride, and high-density lipoprotein-cholesterol levels, as well as antihypertensive and antidyslipidemic medications.CONCLUSION: We observed that FVC was independently and inversely associated with CKD. This finding suggests that careful monitoring of renal function is necessary to evaluate possible kidney dysfunction in patients with decreased FVC.