Correlation between relative fat mass index and glomerular filtration rate in elderly hypertensive population
10.3760/cma.j.issn.0254-9026.2025.10.015
- VernacularTitle:老年高血压人群相对脂肪质量指数与肾小球滤过率的相关性研究
- Author:
Shu XIE
1
;
Danxiang CHEN
1
;
Yanyan ZHANG
1
;
Xueqin LI
1
Author Information
1. 南京医科大学附属淮安第一医院全科医学科，淮安 223300
- Publication Type:Journal Article
- Keywords:
Hypertension;
Relative fat mass;
Glomerular filtration rate
- From:
Chinese Journal of Geriatrics
2025;44(10):1414-1421
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the correlation between relative fat mass(RFM)and Estimated Glomerular Filtration Rate(eGFR)in an elderly hypertensive population.Methods:This cross-sectional study enrolled elderly hypertensive individuals aged 65 years and older from Huai'an city between June 2023 and December 2023.Clinical data for these subjects were collected, and RFM and eGFR were calculated according to established formulas.Subsequently, the subjects were divided into two groups based on their eGFR levels: the eGFR normal group and the eGFR decreased group.Differences between these two groups were compared.Multivariate logistic regression models were employed to analyze the association between RFM and eGFR, and a subgroup analysis was conducted.The predictive value of RFM for renal function decline was evaluated using receiver operating characteristic curves(ROC).Results:Among the 2, 603 subjects, 921(35.4%)were assigned to the eGFR decreased group, while 1, 682(64.6%)were assigned to the eGFR normal group.The proportion of males, married individuals, smokers, and alcohol drinkers, as well as diastolic blood pressureand cultural levels, were significantly lower in the eGFR decreased group compared to the eGFR normal group (all P<0.05). Conversely, the duration of hypertension, proportion of comorbidities, age, fasting blood glucose, triglycerides, low-density lipoprotein cholesterol(LDL-C), relative fat mass(RFM), visceral fat index(VAI), dysfunctional obesity index(DAI), body roundness index(BRI), and conicity index(C-index)were all significantly higher in the eGFR decreased group compared to the eGFR normal group(all P<0.05). After adjusting for confounding factors, multivariate logistic regression analysis revealed that when RFM was treated as a continuous variable, the risk of eGFR decline increased with rising RFM(odds ratio[ OR]=1.035, 95% confidence interval[95% CI]: 1.008-1.063, P=0.010). When grouped according to RFM quartile levels(in ascending order)into Q1(<26.22), Q2(26.22-<30.53), Q3(30.53-<39.26), and Q4(≥39.26), using the Q1 group as a reference, the risk of eGFR decline increased in the Q3( OR=1.691, 95% CI: 1.777-2.430, P=0.004)and Q4( OR=1.743, 95% CI: 1.118-2.717, P=0.014)groups.In the subgroup analysis, gender( P-interaction=0.034)and smoking( P-interaction=0.012)were identified as having significant interaction effects on RFM and the decline in eGFR.In the male subgroup( OR=1.067, 95% CI: 1.027-1.108, Ptrend=0.001)and the smoking subgroup( OR=1.109, 95% CI: 1.026-1.199, Ptrend=0.009), the risk of eGFR decline significantly increased with higher levels of RFM.The restricted cubic spline(RCS)analysis indicated that when RFM exceeded 30.609, the risk of eGFR decline increased with rising RFM levels, demonstrating a non-linear correlation between RFM and the risk of eGFR decline( Pnonlinearity=0.048 5). The ROC curve analysis revealed that the area under the curve(AUC)for RFM in predicting eGFR reduction was 0.635(95% CI: 0.613-0.657, P1<0.001), which was significantly higher than the AUC for VAI(AUC=0.573, 95% CI: 0.550-0.596, P2<0.001), DAI(AUC=0.562, 95% CI: 0.539-0.584, P2<0.001), BRI(AUC=0.564, 95% CI: 0.541-0.587, P2<0.001), and the C-index(AUC=0.536, 95% CI: 0.513-0.559, P2<0.001). Conclusions:Elevated RFM is an independent risk factor for eGFR decline in elderly hypertensive individuals.There exists a significant interaction between gender and smoking with respect to the risk of RFM and eGFR decline.Additionally, RFM demonstrates a notable predictive value for eGFR decline in elderly hypertensive individuals.
