Research Article
Air Pollution by Hydrothermal Volcanism and Human Pulmonary Function
Table 4
Adjusted association between characteristics of study participants, exposure to volcanogenic soil diffuse degassing, and COPD exacerbation.
| Ordinal logistic regression | | | Number of obs. 505 LR chi2(5) = 70.19 Prob > chi2 = <0.001 | Parameter | (%) | OR (95% CI)a | P value |
| Age | | 1.04 (1.02–1.06) | <0.001 | Easy fatigue | | | | Yes | 116 (23) | 1.80 (1.00–3.24) | 0.046 | No | 389 (77) | 1.00 | | Asthma | | | | Yes | 43 (8.5) | 2.25 (1.05–4.82) | 0.037 | No | 462 (91.5) | 1.00 | | Smoking status | | | | Smoker | 163 (32.3) | 2.11 (1.25–3.56) | 0.005 | Nonsmoker | 342 (67.7) | 1.00 | | Exposure to DDS | | | | Yes (study group) | 146 (28.9) | 3.19 (1.82–5.58) | <0.001 | No (reference group) | 359 (71.1) | 1.00 | |
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aOR, odds ratio; 95% CI, 95% confidence interval.
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