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Diurnal temperature range and childhood asthma: a time-series study
Zhiwei Xu1, Cunrui Huang, Hong Su
1School of Public Health and Social Work& Institute of Health and Biomedical Innovation, Queensland University of Technology, Kelvin Grove, Brisbane, Australia.
Environmental Health : a Global Access Science Source
|February 5, 2013
Summary
Large daily temperature variation (DTR) significantly increases childhood asthma emergency visits. Children aged 5-9 and males are more vulnerable. Protective measures are advised when DTR exceeds 10°C.
Area of Science:
- Environmental Health
- Pediatric Respiratory Medicine
- Biostatistics
Background:
- Childhood asthma prevalence is linked to temperature extremes.
- The specific impact of daily temperature fluctuations on pediatric asthma remains unclear.
- This research investigates the association between diurnal temperature range (DTR) and childhood asthma exacerbations.
Purpose of the Study:
- To determine the relationship between diurnal temperature range (DTR) and emergency department admissions for childhood asthma.
- To identify vulnerable pediatric populations and temperature thresholds associated with increased asthma risk.
Main Methods:
- Utilized a Poisson generalized linear model with a distributed lag non-linear model.
- Analyzed data from Brisbane emergency department admissions for childhood asthma between 2003 and 2009.
- Examined the association between DTR and asthma exacerbations, considering lag effects.
Main Results:
- A statistically significant association was found between DTR and childhood asthma admissions.
- The risk of asthma exacerbations increased notably with DTR above 10°C.
- A 5°C increase in DTR correlated with a 31% rise in emergency visits within 0-9 days, particularly in males and children aged 5-9.
Conclusions:
- Significant diurnal temperature range (DTR) is a potential trigger for childhood asthma.
- Public health strategies for asthma prevention should incorporate temperature variability.
- Increased protective measures are recommended following days with DTR exceeding 10°C.
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