Finding F-1325

“The prevalence of ETS exposure was similar across the study area (74.5% in urban areas, 70.2% in suburban areas, and 73.5% in rural areas).”

Respiratory symptoms in relation to residential coal burning and environmental tobacco smoke among early adolescents in Wuhan, China: a cross-sectional study (2004). Environmental health : a global access science source. Page 3. CKB 7215

Structure

Factor: Tobacco smoke (secondhand smoke)
Population: seventh-grade pupils
Setting: home, CN
Study design: cross-sectional study of 5051 seventh-grade pupils in 22 randomly selected schools of the greater metropolitan area of Wuhan, China: a self-administered in-class questionnaire on respiratory health and the home environment, analysed with logistic regression (class 4)
Effect: prevalence 73.5
Sample: 5,051 children
Caveat: reported in a questionnaire, not measured

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.