Finding F-1677

“Coal use was a risk factor for asthma in period 1 (OR =2.34, 95% CI: 1.30–4.23), while it was not significantly associated with prevalence of asthma in period 2 (OR =0.60, 95% CI: 0.08–4.51).”

Household environmental factors and children's respiratory health comparison of two… (2021). Journal of thoracic disease. Page 1. CKB 8235

Structure

Source: Coal
Outcome: Asthma
Setting: home, CN (period 2)
Study design: repeat cross-sectional study of schoolchildren in the same city ten years apart: household fuel and other indoor determinants related to asthma, bronchitis and respiratory symptoms in each period (class 4)
Effect: OR 0.60 (0.08–4.51)
Caveat: the interval is very wide because coal use had become rare by the second period; in the first period the same study found 2.34 (95% CI 1.30–4.23)

A Finding records what one published document states, verbatim and with its page. It is not a conclusion of Coridum; see the Claims that build on it.