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Severe volcanic SO2 exposure and respiratory morbidity in the Icelandic population - a register study.


ABSTRACT:

Background

The Holuhraun volcanic eruption September 2014 to February 2015 emitted large amounts of sulfur dioxide (SO2). The aim of this study was to determine the association between volcanic SO2 gases on general population respiratory health some 250?km from the eruption site, in the Icelandic capital area.

Methods

Respiratory health outcomes were: asthma medication dispensing (AMD) from the Icelandic Medicines Register, medical doctor consultations in primary care (PCMD) and hospital emergency department visits (HED) in Reykjavík (population: 215000) for respiratory disease from 1 January 2010 to 31 December 2014. The associations between daily counts of health events and daily mean SO2 concentration and high SO2 levels (24-h mean SO2?>?125??g/m3) were analysed using generalized additive models.

Results

After the eruption began, AMD was higher than before (129.4 vs. 158.4 individuals per day, p?2 was associated with estimated increases in AMD by 0.99% (95% CI 0.39-1.58%) per 10??g/m3 at lag 0-2, in PCMD for respiratory causes 1.26% (95% CI 0.72-1.80%) per 10??g/m3 SO2 at lag 0-2, and in HED by 1.02% (95% CI 0.02-2.03%) per 10??g/m3 SO2 at lag 0-2. For days over the health limit, the estimated increases were 10.9% (95% CI 2.1-19.6%), 17.2% (95% CI 10.0-24.4%) for AMD and PCMD. Dispensing of short-acting medication increased significantly by 1.09% (95% CI 0.49-1.70%), and PCMD for respiratory infections and asthma and COPD diagnoses and increased significantly by 1.12% (95% CI 0.54-1.71%) and 2.08% (1.13-3.04%).

Conclusion

High levels of volcanic SO2 are associated with increases in dispensing of AMD, and health care utilization in primary and tertiary care. Individuals with prevalent respiratory disease may be particularly susceptible.

SUBMITTER: Carlsen HK 

PROVIDER: S-EPMC7916308 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature

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Publications

Severe volcanic SO<sub>2</sub> exposure and respiratory morbidity in the Icelandic population - a register study.

Carlsen Hanne Krage HK   Valdimarsdóttir Unnur U   Briem Haraldur H   Dominici Francesca F   Finnbjornsdottir Ragnhildur Gudrun RG   Jóhannsson Thorsteinn T   Aspelund Thor T   Gislason Thorarinn T   Gudnason Thorolfur T  

Environmental health : a global access science source 20210227 1


<h4>Background</h4>The Holuhraun volcanic eruption September 2014 to February 2015 emitted large amounts of sulfur dioxide (SO<sub>2</sub>). The aim of this study was to determine the association between volcanic SO<sub>2</sub> gases on general population respiratory health some 250 km from the eruption site, in the Icelandic capital area.<h4>Methods</h4>Respiratory health outcomes were: asthma medication dispensing (AMD) from the Icelandic Medicines Register, medical doctor consultations in pri  ...[more]

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