Distribution of smokers by stage in three representative samples

Area of Science:

• Public Health
• Behavioral Science
• Health Intervention Design

Background:

• Stage of Change is crucial for designing effective smoking cessation interventions.
• Reactive recruitment methods for samples can skew results, overrepresenting individuals closer to quitting.
• Representative sampling is essential for accurately estimating population-level readiness to change smoking behavior.

Purpose of the Study:

• To accurately estimate the distribution of smokers across different Stages of Change in the general population.
• To compare stage distributions across diverse demographic groups including age, sex, race, ethnicity, and education.
• To discuss the implications of population stage distribution for public health intervention planning.

Main Methods:

• Three large, representative samples of smokers were recruited using random-digit-dial and worksite surveys.
• Sample sizes were 4,144 (Rhode Island), 9,534 (California), and 4,785 (worksite-based).
• Data allowed for comparisons across sex, age, Hispanic or non-Hispanic origin, race, and education level.

Main Results:

• Stage distributions were consistent across samples: ~40% Precontemplation, ~40% Contemplation, ~20% Preparation.
• Stage distribution was stable across most age groups, except for those 65 and older.
• Higher education levels correlated with a lower proportion in Precontemplation; race and Hispanic origin showed minor, inconsistent differences.

Conclusions:

• The majority of smokers are in the Precontemplation and Contemplation stages, indicating a potential mismatch with current interventions focused on Preparation.
• Interventions can be broadly applied across age groups due to stable stage distributions.
• Demographic variations in stage distribution (education, race, ethnicity) offer guidance for tailoring smoking cessation materials.