Observational study

Use of Smoking Cessation and Quit Support Services by Socioeconomic Status Over 10 Years of the National Drug Strategy Household Survey

Analysis of the use of quit smoking services by smokers in the Australian population.

The relationship between socioeconomic status and ‘hardcore’ smoking over time – greater accumulation of hardened smokers in low-SES than high-SES smokers

Analysis of the hardcore smoking hypothesis, which states that as people quit smoking, those who continue will be more 'hardened' to smoking and less open to intervention.