JOURNAL ARTICLE

Prospective association between baseline plasma zinc concentration and development of proteinuria in Chinese hypertensive patients

Panpan He, Huan Li, Yuanyuan Zhang, Tengfei Lin, Yun Song, Chengzhang Liu, Min Liang, Jing Nie, Binyan Wang, Huiyuan Guo, Xiaobin Wang, Yong Huo, Hao Zhang, Xiping Xu, Xianhui Qin
Journal of Trace Elements in Medicine and Biology 2021 April 2, 66: 126755
33838565

OBJECTIVE: We aimed to evaluate the association between baseline plasma zinc and the development of proteinuria as well as possible effect modifiers in hypertensive patients.

METHODS: This is a subset of the China Stroke Primary Prevention Trial (CSPPT) Renal Sub-Study. In the CSPPT, participants were randomized to receive a daily oral dose of 1 tablet containing 10 mg enalapril and 0.8 mg folic acid or 1 tablet containing 10 mg enalapril only. A total of 783 participants with plasma zinc measurements and without proteinuria at baseline were included in the current study. The study outcome was the development of proteinuria during the follow-up, defined as a urine dipstick reading of trace or ≥1+ at the exit visit.

RESULTS: During a median follow-up duration of 4.4 years, the development of proteinuria occurred in 93 (11.9 %) participants. There was an inverse relation of baseline plasma zinc with the development of proteinuria (per SD increment; OR, 0.74, 95 % CI: 0.55-0.99), p for trend of quartiles = 0.005.

CONCLUSIONS: In Chinese hypertensive patients, there was a significant inverse association between baseline plasma zinc and the development of proteinuria, although plasma zinc remained in the reference range.

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