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Weather Variations and Hospital Admissions for Depressive Disorders: A Case Study in Hanoi
Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Epidemiology and Global Health.
Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Epidemiology and Global Health.ORCID iD: 0000-0003-4030-0449
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2015 (English)In: Annals of Psychiatry and Mental Health, ISSN 2374-0124, Vol. 3, no 1, 1020Article in journal (Refereed) Published
Abstract [en]

Studies from developed countries have shown season and weather influencing mood disorders, but it is not known whether such associations exist in tropical/sub-tropical low- and middle-income countries. This study from Vietnam examined the seasonal pattern of hospital admissions for depressive disorders andits relationship to daily weather variations, after stratifying for age, sex, and geographic area. Daily admission data from 2008 to 2012 were collected from Hanoi Mental Hospital in which 619 first-episode admissions for depressive disorders were diagnosed by the International Classification of Diseases 10 criteria for mood disorders (F30–F39). A negative binominal time series regression model for daily counts of eventswasestablished to analyze the relationship between weather variations, seasonality and daily hospital admissions for depressive disorders after adjusting for time trends. Our findings showed a general tendency for more admissionsin 2010 as well as between May and December, with a seasonal bi-annual high between May-June and November-December. Males were more affected by high ambient temperature and sunshine-hours. Elevated ambient temperature was significantly related to increasing admissions RR=1.05 (1.01 – 1.09) over the same or following day. The relationship between hours of sunshine and the number of cases indicateda significant linear associationin menwhen the number of hours of sunlight per day was over each one hour RR=1.06 (1.02 – 1.11). High temperatures and high numbers of sunshine hours had a strong positive relationship to admission with a delay of 0–13 days. For these associations, men and ages below 40 years appeared more susceptible

Place, publisher, year, edition, pages
JSciMed Central , 2015. Vol. 3, no 1, 1020
Keyword [en]
Weather, Hospital admission, Depressive disorders, Ambient temperature, Humidity, Hours of sunshine
National Category
Public Health, Global Health, Social Medicine and Epidemiology
Identifiers
URN: urn:nbn:se:umu:diva-115796OAI: oai:DiVA.org:umu-115796DiVA: diva2:900542
Available from: 2016-02-04 Created: 2016-02-04 Last updated: 2017-02-28Bibliographically approved
In thesis
1. Weather and extreme heat in association to mental disorders: The case of Hanoi, Vietnam
Open this publication in new window or tab >>Weather and extreme heat in association to mental disorders: The case of Hanoi, Vietnam
2017 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Background: Vietnam suffers consequences of global warming. There is limited data of the relationship between weather, extreme heat and potential mental health problems. It is therefore crucial to study heat-related mental illnesses and to establish good solutions with relevant adaptations to global warming. The adaptation measures should give attention to people that live in areas facing annual extreme weather, and protecting health in general and more specifically mental health of citizens. The study aimed to examine relationships between weather patterns, extreme heat or heatwaves, and mental disorders, and to investigate factors contributing to increased vulnerability and susceptibility.

Methods: The thesis includes a systematic review and a hospital-based study using data from the Hanoi Mental Hospital for five years (2008 – 2012), with mental disorders diagnosed by ICD10 (F00-99) to estimate the effects of weather variation, seasonality, increased temperatures, and heatwaves on hospital admissions for depression and other mental disorders. A negative binomial regression model accounting for yearly study period, time trends, and day of the week was used to analyze the relationship between seasonality, heatwaves, and monthly and daily mental disorder hospitalizations.

Results: Our findings showed (i) a general tendency for more admissions between May and December, with a seasonal bi-annual high between May-June and November-December, and elevated ambient temperature was significantly related to increasing admissions for depressive disorders; (ii) the number of hospital cases for mental disorders increased in the summer seasone specially in June, and two percent of cases emerged during elevated temperature of one degree Celsius; and (iii) when compared with non-heatwave periods, heatwaves amounted to increasing risks for admission for the whole group of mental disorders (F00-79), and admissions for mental disorders among residents in rural communities and in the elderly population increased significantly during heatwaves.

Conclusion: There were associations between hospital admissions for depression and other mental disorders and seasonality, weather patterns, elevated temperatures, and heatwaves. The associations grew stronger with the length of the heatwaves and particularly the elderly appeared more sensitive to seasonality, hot weather and heatwaves.

Place, publisher, year, edition, pages
Umeå: Umeå universitet, 2017. 68 p.
Series
Umeå University medical dissertations, ISSN 0346-6612 ; 1883
Keyword
Depressive disorders, mental disorders, weather patterns, elevated temperature, and heatwaves.
National Category
Public Health, Global Health, Social Medicine and Epidemiology
Research subject
Epidemiology
Identifiers
urn:nbn:se:umu:diva-131984 (URN)978-91-7601-674-9 (ISBN)
Public defence
2017-03-24, Sal 135, Allmänmedicin, byggnad 9A, Norrlands Universitetssjukhus, Umeå, 09:00 (English)
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Supervisors
Available from: 2017-03-03 Created: 2017-02-28 Last updated: 2017-05-04Bibliographically approved

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