PS 09-11 STUDY ON THE RELATIONSHIP BETWEEN WAIST TO HEIGHT RATIO AND BLOOD PRESSURE AND DYSLIPIDEMIA BY USING PROPENSITY SCORE MATCHING

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Abstract

Objective:

To evaluate the association of waist to height ratio (WHtR) with blood pressure (BP) and dyslipidemia by using propensity score matching.

Design and Method:

A logistic regression model was established with the WHtR as the dependent variable and the covariates as the independent variables. For each subject, the propensity score was calculated from the model for caliper matching.

Results:

The covariates between the two groups were balanced after caliper matching based on the propensity scores. Before matching, the prevalence of hypertension between WHtR ≥ 0.5 and the WHtR < 0.5 were 47.86% vs 25.18%; after propensity score matching, the prevalence of hypertension between WHtR ≥ 0.5 and the WHtR < 0.5 were 43.72% vs 27.04%. Before matching, the prevalence of hypercholesterolemia, high blood LDL-C, low blood HDL-C and hypertriglyceridemia between WHtR ≥ 0.5 and the WHtR < 0.5 were 9.66% vs 4.68%, 6.29% vs 3.49%, 14.22% vs 6.98%, and 22.81% vs 7.28%. After propensity score matching, the prevalence of hypercholesterolemia, high blood LDL-C, low blood HDL-C and hypertriglyceridemia between WHtR ≥ 0.5 and the WHtR < 0.5 were 9.23% vs 5.16%, 6.12% vs 3.54%, 14.36% vs 6.93%, and 22.34% vs 7.34%. The prevalence of hypertension is lower after propensity score matching, the difference is 4.14% (2.03%∼6.93%).

Conclusions:

Propensity score matching can effectively reduce the confounding bias of observational data for a more accurate evaluation of the effect of the WHtR on blood pressure and dyslipidemia.

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