BMJ open
Association between dietary salt intake and early renal impairment in elderly patients with type 2 diabetes: a cross-sectional study in central and southern China
By Zhu X, Wang L, Zhao H and 2 others.
Abstract
Objective
This study aims to investigate the association between dietary salt intake and early renal impairment in elderly patients with type 2 diabetes.
Design
A retrospective cross-sectional study.
Setting
A health management centre of a large tertiary hospital in Hunan province, China, which is also one of the largest health management centres in central and southern China.
Participants
A total of 1027 elderly patients with type 2 diabetes participated in the study from 2017 to 2024. Primary and secondary outcome measures: All participants completed a self-administered health assessment questionnaire before undergoing routine check-ups. Daily salt intake was calculated based on the 24-hour urinary sodium excretion. Early renal impairment was defined as urinary albumin to creatinine ratio (UACR) between 30 and 300 mg/g. Multivariable binary logistic regression and restricted cubic spline analyses assessed the association between dietary salt intake and early renal function impairment.