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Expert System and Family Assisted Interventions for Chinese Smokers

18 Years
Not Enrolling
Smoking Cessation

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Trial Information

Expert System and Family Assisted Interventions for Chinese Smokers

Limited empirical data are available on effective intervention approaches targeting Chinese
American smokers. The overall goal of this study is to increase our understanding of the
role of family or social support in the facilitation of the process of smoking cessation
among Chinese smokers. We propose the following specific aims for the study: 1) Examine the
effectiveness of proactive recruitment of Chinese smokers into a smoking cessation treatment
program through their family or friends; 2) Test the efficacy of a family assisted
intervention using the stages of change approach in promoting smoking cessation in the
context of an expert system intervention; 3) Explore the role of supportive and
non-supportive behaviors in relation to both short-term and long-term smoking cessation
outcomes in the presence of the expert system intervention. This study will develop a
family-assisted intervention in the form of a self-help booklet based on the
Transtheoretical Model of Change (TTM) that will aim at teaching the supporters how to use
the stages of change framework to apply different strategies that best match with smokers'
readiness to quit smoking. This study will conduct focus groups and a pilot study to
pre-test the study intervention and study procedures. The main randomized trial will recruit
a total of 800 supporters and 800 smokers who are ethnic Chinese residing in the State of
California. Each supporter-smoker pair will be randomly assigned to either 1) the expert
system intervention only or 2) the expert system plus family-assisted intervention condition
after baseline assessment by mail. All smokers in either condition will receive the expert
system intervention. Half of the supporters will receive family-assisted intervention
materials. All participants will be assessed at baseline, 3, 6, 12, and 18 months by mail or
telephone. It is hypothesized that the expert system plus family-assisted intervention
condition will yield significantly higher abstinence rates and higher portions to report
quit attempts at follow-ups.

Inclusion Criteria:

- self-identified ethnic Chinese

- men and women

- above age 18

- can read and speak Chinese or English

- reside in the State of California at baseline

- to participate as a supporter, the participant must have a targeted smoker who meet
the smoker eligibility criteria who provides consent to participate in the study as a
smoker participant

- to participate as a smoker, the participant must have smoked at least 100 cigarettes
in lifetime and have smoked at least 5 cigarettes in the past 7 days, and have a
supporter who provides consent to be a supporter participant

Exclusion Criteria:

- smoker participant currently engage in other smoking cessation programs or efforts

Type of Study:


Study Design:

Allocation: Randomized, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment

Outcome Measure:

self-report 7-day smoking abstinence

Outcome Time Frame:

12 months, 18 months

Safety Issue:


Principal Investigator

Janice Tsoh, PhD

Investigator Role:

Principal Investigator

Investigator Affiliation:

University of California, San Francisco


United States: Institutional Review Board

Study ID:

TURSG-03-102-01 PBP



Start Date:

August 2004

Completion Date:

December 2008

Related Keywords:

  • Smoking Cessation
  • smoking cessation
  • Asian
  • Chinese American
  • family support
  • social support
  • stage-based intervention
  • Smoking



UCSF Langley PorterSan Francisco, California  94143