Serum low density lipoprotein cholesterol / high density lipoprotein cholesterol ratio predicts lower urinary tract dysfunction related dyslipidemia

Abstract

Objectives: To investigate the effect of dyslipidemia on the lower urinary tract function by examining the LDL-C/HDL-C ratio in patients without bladder outlet obstruction (BOO).

Methods: Patients who underwent urodynamic study before robot-assisted radical prostatectomy were included.　Exclusion criteria were diabetes mellitus (HbA1c > 6.2%) and BOO (Schäfer nomogram obstruction III - V).　The association between the preoperative LDL-C/HDL-C ratio and urodynamic findings were analyzed.　Patients were divided into two groups based on Schäfer nomogram: weak contraction group (W−, W+, N−) and strong contraction group (N+, ST) to assess the relationship between the LDL-C/HDL-C ratio and bladder contraction.

Results: A total of 52 patients entered the study.　The LDL-C/HDL-C ratio was 2.4 ± 0.8.　The preoperative international prostate symptom score was mild (6.7 ± 5.6).　Voided volume was significantly positively associated with the LDL-C/HDL-C ratio (P=0.041).　The LDL-C/HDL-C ratio was significantly less in the strong contraction group than in the weak contraction group (P=0.047).　Receiver operating characteristic (ROC) analysis showed a cut-off value of 2.15 for the LDL-C/HDL-C ratio in predicting weak bladder contraction.

Conclusions: Dyslipidemia-induced lower urinary tract dysfunction (LUTD) showed less bladder contractility with larger voided volume.　The LDL-C/HDL-C ratio ≥ 2.15 may be a useful marker of dyslipidemia-induced LUTD.