Association between working hours and urinary sodium and potassium excretion levels in a population undergoing health examinations, and the potential mediating effect of timely eating behaviors
10.3760/cma.j.cn115624-20230321-00188
- VernacularTitle:健康体检人群工作时长与尿钠、钾排泄水平的关联性及按时就餐行为在其中的中介机制
- Author:
Wenbin OUYANG
1
;
Xin HUANG
;
Pingting YANG
;
Xue HE
;
Hao WU
;
Ying LI
Author Information
1. 湖南师范大学医学院预防医学系，长沙 410013
- Keywords:
Physical examination;
Working hours;
Dietary behavior;
Sodium;
Potassium;
Mediating effect
- From:
Chinese Journal of Health Management
2023;17(10):727-732
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To examine the association between working hours and urinary sodium and potassium excretion levels in a population undergoing health examinations and the potential mediating effect of timely eating behaviors.Methods:In this cross-sectional study, 64 400 people who received health checkups from August 2017 to August 2022 at the Third Xiangya Hospital of Central South University were recruited as study subjects. General information on socio-demographic characteristics of the enrolled subjects were collected using the health checkup self-assessment questionnaire in the Expert Consensus on Basic Items for Health Checkups. Urinary excretion levels of sodium and potassium were measured with the Kawasaki method. The association between working hours and urinary sodium and potassium excretion levels was checked by using Pearson′s correlation analysis. The relationships between timely eating behaviors, working hours, and urinary sodium and potassium excretion levels and their ratios were analyzed using logistic regression and linear regression models, while the mediating mechanisms involved was also examined.Results:Among the 64 400 subjects, there were 39 274 males (60.98%) and 25 126 females (39.02%), the mean age was (43.80±11.13) years. There were 16 980 individuals (26.37%) with an average working time exceeding 8 hours per day. Additionally, 4 332 subjects (6.73%) were unable to eat three meals on time. The mean urinary sodium and potassium excretion and their ratios were (4.12±1.86) g/d, (2.06±0.80) g/d, 2.05±0.66, respectively. There was a significant positive correlation between working hours and urinary sodium excretion, urinary potassium excretion, and their ratios ( r=0.034, 0.021, 0.032, respectivley); it showed that timely eating behavior had a significant negative correlation with urinary sodium and potassium excretion ( r=-0.022, -0.019, respectivley) (all P<0.001). There was a partial mediating effect of timely eating behavior in the association between working hours and urinary sodium excretion (effect value of -0.006), and after stratifying the labor intensity, this mediating effect was only found among individuals engaged in light physical labor (both P<0.001). Conclusions:Prolonged working hours leads to increased levels of urinary sodium and urinary potassium excretion, and timely eating behavior facilitates salt/sodium reduction in light-duty workers.
