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Table 5 Percent excess risk in age-specific respiratory health outcomes associated with SO2 exposure at lag 0–2 (both for exposure as a continuous variable and for days with pollution levels above the air quality guideline value)

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

 

Anti-asthma medication (AMD)

 Children 0–17

1.48%

0.61%

2.35%

20.2%

7.8%

32.6%

 Adults 18–65

0.86%

0.20%

1.53%

11.3%

1.8%

20.9%

 Elderly > 65

0.90%

0.14%

1.67%

9.8%

−1.4%

20.9%

Primary care MD visits (PCMD)

 Children 0–17

1.24%

0.40%

2.08%

14.2%

3.0%

25.5%

 Adults 18–65

1.21%

0.63%

1.79%

18.5%

10.6%

26.3%

 Elderly > 65

1.11%

0.14%

2.09%

11.8%

−2.0%

25.6%

Hospital Emergency Department (HED)

 Children 0–17

1.22%

−0.62%

3.10%

7.0%

−18.7%

32.7%

 Adults 18–65

0.52%

− 0.99%

2.06%

0.0%

−20.7%

20.7%

 Elderly > 65

1.01%

−0.62%

2.66%

19.7%

−1.8%

41.2%

  1. All results are adjusted for season, time, day of week, odd holidays, the outcome at lag1, and MD strike for PCC and HED, relative humidity, temperature, PM10, and NO2. n = 1788