ArticleJournal of asthma and allergy2021
Second-Hand Smoke Exposure Associated with Risk of Respiratory Symptoms, Asthma, and COPD in 20,421 Adults from the General Population.
Article in Journal of asthma and allergy, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 2 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
16 citing papers in PubMed, 2 syntheses or guidelines pooled it, 38 citations in OpenAlex.
- Secondhand smoke exposure and human health: an umbrella review.Nature human behaviour · 2026Pooled it
- Secondhand Smoke Exposure and the Risk of Chronic Obstructive Pulmonary Disease: A Systematic Review and Meta-Analysis.International journal of chronic obstructive pulmonary disease · 2023Pooled it
- National, Subnational, and Risk-Attributed Burden of Chronic Respiratory Diseases in Iran (1990-2021): A Longitudinal Clustering Analysis of Global Burden of Disease 2021 Data.Health science reports · 2026Article
- Association of genetic variants in the autophagy gene ATG4B with asthma.medRxiv : the preprint server for health sciences · 2026Article
- Association of active and passive smoking with noncommunicable diseases in a large health check-up population: A cross-sectional study in Changzhi, Shanxi province, China.Tobacco induced diseases · 2026Article
- Development and validation of a predictive model for COPD: a multicenter study.Frontiers in medicine · 2025Article
- Article
- Unusual case of bullous emphysema with superimposed pneumonia.Radiology case reports · 2024Article
- Influence of secondhand smoke exposure on the retinal vasculature of children in Hong Kong.Communications medicine · 2023Article
- Burden of diseases attributable to second-hand smoke exposure in Iran adolescents from 2009 to 2020.Scientific reports · 2023Article
- The Association of Lung Function and Carotid Intima-Media Thickness in a Japanese Population: The Tohoku Medical Megabank Community-Based Cohort Study.Journal of atherosclerosis and thrombosis · 2023Article
- Antioxidant Intake and Biomarkers of Asthma in Relation to Smoking Status-A Review.Current issues in molecular biology · 2023Review
- Vitamin D status and chronic obstructive pulmonary disease risk: a prospective UK Biobank study.BMJ open respiratory research · 2023Article
- Article
- National, subnational and risk attributed burden of chronic respiratory diseases in Iran from 1990 to 2019.Respiratory research · 2023Article
- Public Health Burden of Secondhand Smoking: Case Reports of Lung Cancer and a Literature Review.International journal of environmental research and public health · 2022Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
3 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
rationaleIndividuals exposed to second-hand smoking may be more susceptible to asthma and chronic obstructive pulmonary disease (COPD). We investigated the risk of respiratory symptoms, asthma, and COPD in adults exposed to second-hand smoking at different stages of life in the general population.
methodsWe identified individuals who had been exposed to second-hand smoking in childhood only, adulthood only, or lifelong in a cohort of 20,421 adults from the Danish General Suburban Population Study and recorded respiratory symptoms, lung function, asthma, and COPD as outcomes.
resultsAmong 20,421 adults from the general population, 2,551 (12%) had been lifelong exposed to second-hand smoking, 459 (2%) had been exposed in adulthood only, and 13,998 (69%) had been exposed in childhood only; the mean ages of the three groups were 54 years, 55 years, and 57 years, respectably, compared with 56 years in non-exposed individuals (
conclusionIndividuals exposed to lifelong second-hand smoking have increased risks of respiratory symptoms, asthma, and COPD, and may account for 4.3% and 2.9% of people with asthma and COPD in the general population.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.