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Tob Control. 2010 Apr;19 Suppl 1:i56-61. doi: 10.1136/tc.2009.031047.

Using a cessation-related outcome index to assess California's cessation progress at the population level.

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Genetic Disease Screening Program, California Department of Public Health, 850 Marina Bay Parkway, MS 8200, Richmond, CA 94804, USA.



The California Tobacco Control Program (CTCP) has employed strategies to change social norms around smoking in order to decrease the prevalence of smoking and tobacco-related diseases. Research is scarce on CTCP's impact on overall smoking cessation in California.


Tobacco Use Supplement to the Current Population Survey (TUS-CPS) data from 1992-1993 to 2006-2007 was used to create a cessation-related outcome index (CROI), which was a summarised z score of the following determinants: plan to quit, quit attempt and recent quit rate for each of the 50 US states. CROI trends over the period of six separate TUS-CPSs were plotted for California and other comparison states, for 18-34 year olds and for those 35 years or older separately in the context of historical cigarette price z score trend.


California had a consistently high CROI for both age groups. The CROI trend line increased moderately in California for both age groups despite a declining cigarette price z score trend. In contrast, other selected states with a declining cigarette price z score trend had a declining CROI trend for both age groups.


The increase of CROI in California while cigarette price z score trend declined suggests that the implementation of CTCP, even without a significant direct cessation component, has had a profound impact on cessation outcomes.

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