Depression treatment
Does smoking track with depression in US adults?
Open access · cc by · source: Europe PMC
In NHANES 2005–2018, daily smokers had ~2.4× the odds of PHQ-9 depression vs never smokers; longer cessation tracked lower odds.
How this study connects
Role on claims
Each row is a claim on a concept or method page where this paper supports, challenges, or qualifies the statement. Roles are hand-checked — not a model guess.
Daily smoking shows the highest depression odds vs never smokers in NHANES.
In 30,524 US adults, daily smokers had OR 2.37 for PHQ-9–defined depressive symptoms vs never smokers; longer cessation tracked lower odds.
Evidence for the claim as stated.
Cessation can be supported with ecological momentary interventions.
An EMI smoking-cessation evaluation tests delivering support in daily life—intervention evidence, not the same as the NHANES association estimate.
Scope note — intervention study ≠ cross-sectional OR for depression
Limits the claim's scope: a different population, assay, or outcome.
Tobacco smoking associates with many cardiovascular disease subtypes.
Large-scale tobacco analyses link smoking to broad cardiovascular subtype risk—downstream disease burden beyond mood symptoms.
Scope note — CV subtype risk ≠ depression PHQ-9 odds
Limits the claim's scope: a different population, assay, or outcome.
Association ORs for depression, cessation trial/intervention results, and CV disease risk from tobacco should not be treated as one causal chain without designs that can test directionality.
Evidence for the claim as stated.
Open questions
Tensions this paper is part of
From concept pages' “where studies disagree.” Disagreement means the same question; scope means different assays, populations, or outcomes.
Association ORs for depression, cessation trial/intervention results, and CV disease risk from tobacco should not be treated as one causal chain without designs that can test directionality.
- Supports · Smart-T smoking EMI app
- Supports · How broadly does smoking raise heart and vessel disease risk?
Study at a glance
- Design
- Cross-sectional — NHANES 2005–2018 smoking status/volume/cessation vs PHQ-9 depression
- N
- N=30524 · Adults ≥20 in final smoking-status analysis after exclusions
- Population
- US adults in NHANES with smoking and depression measures
- Outcome
- Clinically relevant depressive symptoms (PHQ-9 ≥10) by smoking patterns
Structured fields used in claim comparison tables when every cited study has a complete layer.
Inspect source passages
Does smoking track with depression in US adults?
These passages occur verbatim in the stored paper text. They support the points listed below; they do not verify every statement in the explanation.
Daily smokers OR 2.37 for depression vs never smokers.
Daily smokers had the highest risk of depression (OR = 2.37, 95% CI: 2.05–2.75).
Previous OR 1.25; occasional OR 1.84 vs never smokers.
Previous smokers [odds ratio (OR) = 1.25, 95% confidence interval (CI): 1.05–1.48] and occasional smokers (OR = 1.84, 95% CI: 1.39–2.45) were associated with a higher risk of depression compared with never smokers.
Key findings
Previous (OR 1.25), occasional (OR 1.84), and daily smokers (OR 2.37) had higher depression odds than never smokers. Higher daily volume associated with higher odds (OR 1.65 trend); longer cessation associated with lower odds (OR 0.55 trend).
Methodology
Analyzed adults ≥20 from NHANES 2005–2018, classifying smoking status, daily volume, and cessation duration against PHQ-9 ≥10 using multivariable logistic regression.
Limitations
Cross-sectional data cannot establish whether smoking causes depression or depressed people smoke more; residual confounding remains.
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