Household Composition and Smoking Behavior in a Prospective Longitudinal Australian Cohort
Karinna Saxby1, Andrew Ireland1, Peter Ghijben1
1Centre for Health Economics, Monash Business School, Monash University, Building H, 900 Dandenong Road Caulfield East, Victoria, Australia.
Summary
Household smoking behaviors significantly impact cessation and relapse rates. Smokers living with other smokers are less likely to quit, highlighting the need for household-level interventions to reduce smoking prevalence.
Area of Science:
- Public Health
- Epidemiology
- Behavioral Science
Background:
- Smoking cessation and relapse are influenced by social factors.
- Understanding household dynamics is crucial for effective tobacco control.
Purpose of the Study:
- To estimate the association between household members' smoking behavior and individual cessation/relapse patterns.
- To forecast future smoking prevalence based on household smoking status.
Main Methods:
- Analysis of longitudinal data from 12,723 Australian smokers (2001-2019).
- Multivariate regression models to assess smoking cessation and relapse likelihood.
- Forecasting smoking prevalence over 10 years across different household types.
Main Results:
- Individuals with a smoking spouse were less likely to quit (OR 0.77) and more likely to relapse (OR 1.47).
- The proportion of smokers living with other smokers increased by 15% (2011-2019).
- Projected 10-year reduction in smokers: 43% (living with nonsmokers) vs. 26-28% (living alone/with smokers).
Conclusions:
- Smokers are increasingly living with other smokers, reducing cessation likelihood and increasing relapse risk.
- Current smoking projection models may overestimate benefits if household dynamics are ignored.
- Household-level interventions, especially targeting spouses, are vital for smoking cessation and relapse prevention.
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