Long-Term Apparent Temperature, Extreme Temperature Exposure, and Depressive Symptoms: A Longitudinal Study in China

Temperature is increasingly understood to impact mental health. However, evidence of the long-term effect of temperature exposure on the risk of depressive symptoms is still scarce. Based on the China Health and Retirement Longitudinal Study (CHARLS), this study estimated associations between long-term apparent temperature, extreme temperature, and depressive symptoms in middle-aged and older adults. Results showed that a 1 °C increase or decrease from optimum apparent temperature (12.72 °C) was associated with a 2.7% (95% CI: 1.3%, 4.1%) and 2.3% (95% CI: 1.1%, 3.5%) increased risk of depressive symptoms, respectively. This study also found that each percent increase in annual change in ice days, cool nights, cool days, cold spell durations, and tropical nights was associated with higher risk of depressive symptoms, with HRs (95%CI) of 1.289 (1.114–1.491), 2.064 (1.507–2.825), 1.315 (1.061–1.631), 1.645 (1.306–2.072), and 1.344 (1.127–1.602), respectively. The results also indicated that people living in northern China have attenuated risk of low apparent temperature. Older people were also observed at higher risk relating to more cool nights. Middle-aged people, rural residents, and people with lower household income might have higher related risk of depressive symptoms due to increased tropical nights. Given the dual effect of climate change and global aging, these findings have great significance for policy making and adaptive strategies for long-term temperature and extreme temperature exposure.

[1]  Chunshan Zhou,et al.  Spatiotemporal relationship characteristic of climate comfort of urban human settlement environment and population density in China , 2022, Frontiers in Ecology and Evolution.

[2]  Xiangming Xiao,et al.  Influence of urban morphological characteristics on thermal environment , 2021 .

[3]  T. Kjellstrom,et al.  Establishing intensifying chronic exposure to extreme heat as a slow onset event with implications for health, wellbeing, productivity, society and economy , 2021 .

[4]  Z. Dong,et al.  Clean heating and heating poverty: A perspective based on cost-benefit analysis , 2021, Energy Policy.

[5]  P. Santana,et al.  Suicide and apparent temperature in the two capitals cities in the iberian peninsula. , 2020, Social science & medicine.

[6]  Shaowei Wu,et al.  The effect of temperature on cause-specific mental disorders in three subtropical cities: A case-crossover study in China. , 2020, Environment international.

[7]  L. Janiri,et al.  The Impact of Climate Change on Mental Health: A Systematic Descriptive Review , 2020, Frontiers in Psychiatry.

[8]  A. Halaris.  Inflammation and depression but where does the inflammation come from? , 2019, Current opinion in psychiatry.

[9]  Dongmei Wu,et al.  Incidence and risk factors of depressive symptoms in 4 years of follow-up among mid-aged and elderly community-dwelling Chinese adults: findings from the China Health and Retirement Longitudinal Study , 2019, BMJ Open.

[10]  Q. Wei,et al.  Examining the association between apparent temperature and admissions for schizophrenia in Hefei, China, 2005-2014: A time-series analysis. , 2019, The Science of the total environment.

[11]  Y. Guo,et al.  Long-term exposure to high temperature associated with the incidence of major depressive disorder. , 2019, The Science of the total environment.

[12]  P. Santana,et al.  Short-term impacts of air temperature on hospitalizations for mental disorders in Lisbon. , 2019, The Science of the total environment.

[13]  Pengfei Liu,et al.  Extreme temperature and mortality: evidence from China , 2018, International Journal of Biometeorology.

[14]  R. Thompson,et al.  Associations between high ambient temperatures and heat waves with mental health outcomes: a systematic review. , 2018, Public health.

[15]  R. Basu,et al.  Examining the Association Between Apparent Temperature and Mental Health-Related Emergency Room Visits in California , 2018, American journal of epidemiology.

[16]  Emily Y Y Chan,et al.  Association between Ambient Temperatures and Mental Disorder Hospitalizations in a Subtropical City: A Time-Series Study of Hong Kong Special Administrative Region , 2018, International journal of environmental research and public health.

[17]  Ho Kim,et al.  Mental disease-related emergency admissions attributable to hot temperatures. , 2018, The Science of the total environment.

[18]  J. Fowler,et al.  Nighttime temperature and human sleep loss in a changing climate , 2017, Science Advances.

[19]  G. Murray,et al.  Highs and lows, ups and downs: Meteorology and mood in bipolar disorder , 2017, PloS one.

[20]  C. Yu,et al.  [Reliability and validity of depression scales of Chinese version: a systematic review]. , 2017, Zhonghua liu xing bing xue za zhi = Zhonghua liuxingbingxue zazhi.

[21]  H. Berry,et al.  The Importance of Humidity in the Relationship between Heat and Population Mental Health: Evidence from Australia , 2016, PloS one.

[22]  S. Russo,et al.  Pathogenesis of depression: Insights from human and rodent studies , 2016, Neuroscience.

[23]  W. Larry Kenney,et al.  Sympathetic regulation during thermal stress in human aging and disease , 2016, Autonomic Neuroscience.

[24]  R. Kenny,et al.  Seasonal and meteorological associations with depressive symptoms in older adults: A geo-epidemiological study. , 2016, Journal of affective disorders.

[25]  G. Chrousos,et al.  HPA Axis and Sleep , 2016 .

[26]  J. Strauss,et al.  Depressive symptoms and SES among the mid-aged and elderly in China: evidence from the China Health and Retirement Longitudinal Study national baseline. , 2014, Social science & medicine.

[27]  M. Martínez-González,et al.  Geographical and climatic factors and depression risk in the SUN project. , 2014, European journal of public health.

[28]  Guoyu Ren,et al.  Urbanization Effect on Trends of Extreme Temperature Indices of National Stations over Mainland China, 1961–2008 , 2014 .

[29]  John Strauss,et al.  Cohort profile: the China Health and Retirement Longitudinal Study (CHARLS). , 2014, International journal of epidemiology.

[30]  H. Su,et al.  A positive relationship between ambient temperature and bipolar disorder identified using a national cohort of psychiatric inpatients , 2013, Social Psychiatry and Psychiatric Epidemiology.

[31]  Yuming Guo,et al.  Ambient temperature and coronary heart disease mortality in Beijing, China: a time series study , 2012, Environmental Health.

[32]  E. Walker,et al.  Diagnostic and Statistical Manual of Mental Disorders , 2013 .

[33]  T. Kjellstrom,et al.  Climate change and mental health: a causal pathways framework , 2010, International Journal of Public Health.

[34]  Michael Greenstone,et al.  Massachusetts Institute of Technology Departnnent of Economics Working Paper Series Winter Heating or Clean Air? Unintended Impacts of China's Huai River Policy , 2022 .

[35]  Hannu Rintamäki,et al.  Autonomic nervous function during whole-body cold exposure before and after cold acclimation. , 2008, Aviation, space, and environmental medicine.

[36]  S. Hajat,et al.  Heat stress and public health: a critical review. , 2008, Annual review of public health.

[37]  S. Hajat,et al.  Relationship between daily suicide counts and temperature in England and Wales. , 2007, The British journal of psychiatry : the journal of mental science.

[38]  K. Pal,et al.  Autonomic Nervous System and Adrenal Response to Cold in Man at Antarctica , 2005, Wilderness & environmental medicine.

[39]  J Smolander,et al.  Effect of Cold Exposure on Older Humans , 2002, International journal of sports medicine.