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Table 3 Percent excess risk associated with daily SO2 exposure at lag 0–2 (for exposure as a continuous variable, left, and as an indicator for days with pollution levels above the air quality guideline value, right) and respiratory health outcomes in the capital area of Iceland

From: Severe volcanic SO2 exposure and respiratory morbidity in the Icelandic population – a register study

 

SO2 (per 10 μg/m3)

SO2 levels > 125 μg/m3

%

95% CI

%

95% CI

Asthma medication (AMD)

  

 Model 1

0.89%

0.29%

1.49%

10.5%

1.8%

20.0%

 Model 2

0.99%

0.39%

1.58%

10.9%

2.1%

19.6%

Primary care MD visits (PCMD)

  

 Model 1

1.18%

0.68%

1.69%

16.9%

9.2%

25.0%

 Model 2

1.26%

0.72%

1.80%

17.2%

10.0%

24.4%

Hospital Emergency Department (HED)

 

 Model 1

0.83%

-0.12%

1.78%

11.7%

−1.4%

26.7%

 Model 2

1.02%

0.02%

2.03%

9.4%

−3.8%

22.6%

  1. Model 1: Adjusted for season, time trend, day of week, odd holidays, the outcome at lag 1, temperature, and relative humidity. n = 1606
  2. Model 2: Adjusted for season, time trend, day of week, odd holidays, the outcome at lag 1, temperature, relative humidity, NO2, PM10 at the same lags as SO2. n = 1529
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Environmental Health

ISSN: 1476-069X