Abstract
To investigate the relationship between benign prostatic hyperplasia (BPH)/lower urinary tract symptoms (LUTS) and renal function in elderly men aged 80 years and older. We selected 389 elderly men aged 80-97 years with BPH/LUTS hospitalized at The Second Division of General Geriatrics, The First Affiliated Hospital of Zhengzhou University, between July 2018 and July 2020. In the cross-sectional study, patients were divided into the treatment (233 patients) and non-treatment (156 patients) groups based on whether they received treatment for BPH/LUTS. In the prospective self-case-control study, we included 129 of the non-treatment group patients who received oral BPH/LUTS medication and completed the 6-month outpatient follow-up. We compared prostate indicators and renal function in the cross-sectional study and baseline and after-treatment data in the prospective self-case-control study. Multiple linear regression analysis was performed for risk factors affecting renal function before and after BPH/LUTS treatment. In the cross-sectional study, renal function was significantly better in the treatment group than in the non-treatment group. In the subgroup analysis of the prospective self-case-control study, renal function significantly improved after treatment among patients with hypertension and those with chronic kidney disease (CKD) 3a, but not in the entire cohort. Multivariable linear regression analysis showed that hypertension (β=2.06, 95% CI 0.40 to 3.71) and CKD 3a (β=17.16, 95% CI 15.53 to 18.79) were independent risk factors for creatinine differences before and after treatment, whereas hypertension (β=-2.27, 95% CI -3.65 to -0.89), CKD 3a (β=-11.93, 95% CI -13.29 to -10.58), and baseline prostate volume (β=-0.11, 95% CI -0.20 to -0.02) were independent risk factors for estimated glomerular filtration rate differences before and after treatment. Treatment for moderate and severe BPH/LUTS can improve renal function in elderly patients with hypertension or CKD 3a.
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