Effects of Outdoor Temperature on Blood Pressure in a Prospective Cohort of Northwest China.

Shan ZHENG; Min Zhen WANG; Zhi Yuan CHENG; Feng KANG; Yong Hong NIE; Xiu Ying MI; Hai Yan LI; Lan JIN; Ya Wei ZHANG; Ya Na BAI

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Effects of Outdoor Temperature on Blood Pressure in a Prospective Cohort of Northwest China.

Author: Shan ZHENG ¹ ; Min Zhen WANG ¹ ; Zhi Yuan CHENG ² ; Feng KANG ³ ; Yong Hong NIE ⁴ ; Xiu Ying MI ⁵ ; Hai Yan LI ³ ; Lan JIN ⁶ ; Ya Wei ZHANG ^{7
,

8} ; Ya Na BAI ¹
Author Information

1. Institute of Epidemiology and Statistics, School of Public Health, Lanzhou University, Lanzhou 73000, Gansu, China.
2. Department of Epidemiology, School of Public Health, Brown University, Providence, Rhode Island 02903, USA.
3. Workers' Hospital of Jinchuan Group Co., Ltd., Jinchang 737103, Gansu, China.
4. Jinchang Center for Disease Prevention and Control, Jinchang 737100, Gansu, China.
5. Jinchang Meteorological Service, Jinchang 737100, Gansu, China.
6. Department of Surgery, Yale School of Medicine, New Haven 06511, USA.
7. Department of Surgery, Yale School of Medicine, New Haven 06511, USA
8. Department of Environmental Health Sciences, Yale School of Public Health, New Haven 06511, USA.
Publication Type:Journal Article
Keywords: Blood pressure; Jinchang cohort; Outdoor temperature; Season
MeSH: Adult; Blood Pressure/physiology*; China/epidemiology*; Environmental Exposure/statistics & numerical data*; Female; Humans; Male; Middle Aged; Prospective Studies; Risk Factors; Seasons; Temperature
From: Biomedical and Environmental Sciences 2021;34(2):89-100
CountryChina
Language:English
Abstract: Objective:The relationship between outdoor temperature and blood pressure (BP) has been inconclusive. We analyzed data from a prospective cohort study in northwestern China to investigate the effect of outdoor temperature on BP and effect modification by season.
Methods:A total of 32,710 individuals who participated in both the baseline survey and the first follow-up in 2011-2015 were included in the study. A linear mixed-effect model and generalized additive mixed model (GAMM) were applied to estimate the association between outdoor temperature and BP after adjusting for confounding variables.
Results:The mean differences in systolic blood pressure (SBP) and diastolic blood pressure (DBP) between summer and winter were 3.5 mmHg and 2.75 mmHg, respectively. After adjusting for individual characteristics, meteorological factors and air pollutants, a significant increase in SBP and DBP was observed for lag 06 day and lag 04 day, a 0.28 mmHg (95%
Conclusions:This study demonstrated a significant negative association between outdoor temperature and BP in a high-altitude environment of northwest China. Moreover, BP showed a significant seasonal variation. The association between BP and temperature differed by season and individuals' demographic characteristics (age, gender, BMI), unhealthy behaviors (smoking and alcohol consumption), and chronic disease status (CVDs, hypertension, and diabetes).