Study type/design | Pooled data analysis of cohort or case–control studies | Ecological study case series |
Meta-analysis of cohort or case–control studies |
Systematic review of cohort or case–control studies |
Cohort study |
Case–control study |
Study population | Never-smokers (<100 cigarettes in lifetime) | |
Exposure | Indoor or residential radon exposure | Mining radon exposure |
Comparator | No or lower radon exposure | |
Outcome | Lung cancer diagnosis or death | |
Time of publication | Published from 1 January 1990 to 5 March 2020 | Published before 1990 |
Publication type | Full-text published article | Editorials, conference proceedings, abstracts, posters, narrative reviews, commentaries, grey literature |
Language | English | Language other than English |