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Hou Y, Cao B, Zhu Y, Zhang H, Yang L, Duanmu L, Lian Z, Zhang Y, Zhai Y, Wang Z, Zhou X, Xie J. Temporal and spatial heterogeneity of indoor and outdoor temperatures and their relationship with thermal sensation from a global perspective. ENVIRONMENT INTERNATIONAL 2023; 179:108174. [PMID: 37660634 DOI: 10.1016/j.envint.2023.108174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 08/17/2023] [Accepted: 08/25/2023] [Indexed: 09/05/2023]
Abstract
People spend most of their time indoors. However, indoor temperature and individual thermal exposure are generally not considered in epidemiological studies of temperature and health. Based on the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) RP-884 Database, the ASHRAE Global Thermal Comfort Database II and the Chinese Thermal Comfort Database, this study first explored the relationship between outdoor temperature, indoor temperature and thermal sensation from a global perspective. Moreover, the potential influence of spatiotemporal heterogeneity on health studies was explored. A breakpoint was found at approximately 11.5 °C in the segmented regression of indoor and outdoor temperature, and the slope of the curve was greater when outdoor temperature was above the breakpoint (n = 67,896). Based on multi-group propensity score matching (PSM) and generalizedadditivemodels (GAM), spatiotemporal heterogeneity was found in the relationship between indoor and outdoor temperatures after adjusting for building type and year. Furthermore, the relationship between indoor temperature and thermal sensation was influenced by the outdoor temperature. This study highlights the importance of considering indoor temperature or individual thermal exposure in temperature-related health studies.
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Affiliation(s)
- Yuchen Hou
- Department of Building Science, School of Architecture, Tsinghua University, Beijing, China; Key Laboratory of Eco Planning & Green Building, Ministry of Education (Tsinghua University), Beijing, China
| | - Bin Cao
- Department of Building Science, School of Architecture, Tsinghua University, Beijing, China; Key Laboratory of Eco Planning & Green Building, Ministry of Education (Tsinghua University), Beijing, China.
| | - Yingxin Zhu
- Department of Building Science, School of Architecture, Tsinghua University, Beijing, China; Beijing Key Laboratory of Indoor Air Quality Evaluation and Control (Tsinghua University), Beijing, China
| | - Hui Zhang
- Center for the Built Environment, University of California, Berkeley, USA
| | - Liu Yang
- College of Architecture, Xi'an University of Architecture and Technology, Xi'an, China
| | - Lin Duanmu
- School of Civil Engineering, Dalian University of Technology, Dalian, China
| | - Zhiwei Lian
- Department of Architecture, School of Design, Shanghai Jiao Tong University, Shanghai, China
| | - Yufeng Zhang
- School of Architecture, South China University of Technology, Guangzhou, China
| | - Yongchao Zhai
- College of Architecture, Xi'an University of Architecture and Technology, Xi'an, China
| | - Zhaojun Wang
- School of Architecture, Harbin Institute of Technology, Harbin, China
| | - Xiang Zhou
- School of Mechanical Engineering, Tongji University, Shanghai, China
| | - Jingchao Xie
- Beijing Key Laboratory of Green Built Environment and Energy Efficient Technology, Beijing University of Technology, Beijing, China
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Nakagami H, Otsuka H, Akiyama H. Monitoring with wearable devices will clarify the association between indoor temperature and blood pressure. Hypertens Res 2023:10.1038/s41440-023-01261-7. [PMID: 36977899 DOI: 10.1038/s41440-023-01261-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 02/22/2023] [Accepted: 02/28/2023] [Indexed: 03/30/2023]
Abstract
The association of blood pressure and temperature is well known in seasonal observation, and low temperature in the winter season is often considered a cause of high blood pressure. The current evidence for short-term studies of temperature and blood pressure is based on the daily observation, however continuous monitoring with wearable devices will allow us to evaluate the rapid effect of cold temperature exposure on blood pressure. In a Japanese, prospective intervention study from 2014 to 2019 (the Smart Wellness Housing survey), approximately 90% of Japanese lived in cold houses (indoor temperature less than 18 °C). Importantly, the indoor temperature was associated with the increase of morning systolic blood pressure. We recently addressed the sympathetic nervous activation of individuals in both their houses and a highly insulated and airtight model house in the winter season using portable electrocardiography equipment. A few subjects showed a morning surge in sympathetic activity, which was more intense at their cold houses, which suggests the importance of the indoor environment in the management of early morning hypertension. In near future, real-time monitoring with wearable devices will provide important information for a better life-environment, leading to risk reduction of morning surge and cardiovascular events.
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Affiliation(s)
- Hironori Nakagami
- Department of Health Development and Medicine, Graduate School of Medicine, Osaka University, 2-2 Yamada-oka, Suita, Osaka, Japan.
| | - Hiroki Otsuka
- Asahi Kasei Construction Materials Corporation, 1-105 Kanda Jimbocho, Chiyoda Ward, Tokyo, Japan
| | - Hitoshi Akiyama
- Asahi Kasei Construction Materials Corporation, 1-105 Kanda Jimbocho, Chiyoda Ward, Tokyo, Japan
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Comment to the article: "Consensus statement on the definition of orthostatic hypertension endorsed by the American Autonomic Society and the Japanese Society of Hypertension" by Jordan and colleagues. Clin Auton Res 2023; 33:75-76. [PMID: 36517690 PMCID: PMC9984351 DOI: 10.1007/s10286-022-00913-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Accepted: 11/29/2022] [Indexed: 12/23/2022]
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Moreno Velásquez I, Jaeschke L, Steinbrecher A, Boeing H, Keil T, Janke J, Pischon T. Association of general and abdominal adiposity with postural changes in systolic blood pressure: results from the NAKO pretest and MetScan studies. Hypertens Res 2022; 45:1964-1976. [PMID: 36180592 DOI: 10.1038/s41440-022-01029-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 07/20/2022] [Accepted: 08/13/2022] [Indexed: 11/09/2022]
Abstract
The association between anthropometric measurements and postural changes in systolic blood pressure (SBP) has not been frequently reported. This study aimed to investigate the association of body mass index (BMI) and waist circumference (WC) with postural changes in SBP in two German cross-sectional studies. Data were derived from 506 participants of the population-based German National Cohort (NAKO) pretest and from 511 participants of the convenience sample-based MetScan studies. Linear regression models were used to estimate the association between BMI and WC with the difference between standing and sitting SBP (dSBP). Odds ratios (ORs) for an increase (dSBP > 10 mmHg) or decrease (dSBP ≤ -10 mmHg) in dSBP were calculated using logistic regression. The results were pooled by meta-analysis using an inverse variance model. In pooled analysis, a 5 kg/m2 higher BMI was associated with a 1.46 mmHg (95% confidence interval (CI) 0.98-1.94) higher dSBP, while a 5 cm higher WC was associated with a 0.51 mmHg (95% CI 0.32-0.69) higher dSBP. BMI or WC were associated with a higher odds of an increase in dSBP (adjusted OR, 1.71; 95% CI 1.36-2.14 per 5 kg/m2 higher BMI and 1.22; 95% CI 1.05-1.40 per 5 cm higher WC) but with a reduced odds of a decline in dSBP (adjusted OR, 0.67; 95% CI 0.44-1.00 per 5 kg/m2 higher BMI and 0.84; 95% CI 0.72-0.99 per 5 cm higher WC). The associations between WC and dSBP were no longer statistically significant after BMI adjustments. In conclusion, higher BMI and higher WC were associated with higher postural increases in SBP; however, WC was not related to postural changes in SBP once adjusted for BMI.
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Affiliation(s)
- Ilais Moreno Velásquez
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Molecular Epidemiology Research Group, Berlin, Germany.
| | - Lina Jaeschke
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Molecular Epidemiology Research Group, Berlin, Germany
| | - Astrid Steinbrecher
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Molecular Epidemiology Research Group, Berlin, Germany
| | - Heiner Boeing
- Department of Epidemiology (closed), German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), Nuthetal, Germany
| | - Thomas Keil
- Institute of Social Medicine, Epidemiology and Health Economics, Charité-Universitätsmedizin Berlin, Berlin, Germany.,Institute of Clinical Epidemiology and Biometry, University of Würzburg, Würzburg, Germany.,State Institute of Health, Bavarian Health and Food Safety Authority, Bad Kissingen, Germany
| | - Jürgen Janke
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Molecular Epidemiology Research Group, Berlin, Germany.,Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Biobank Technology Platform, Berlin, Germany.,Berlin Institute of Health (BIH) at Charité-Universitätsmedizin Berlin, Core Facility Biobank Berlin, Berlin, Germany
| | - Tobias Pischon
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Molecular Epidemiology Research Group, Berlin, Germany.,Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Biobank Technology Platform, Berlin, Germany.,Berlin Institute of Health (BIH) at Charité-Universitätsmedizin Berlin, Core Facility Biobank Berlin, Berlin, Germany.,Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany.,German Center for Cardiovascular Research (DZHK), Partner Site Berlin, Berlin, Germany
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