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Smoking Reduction Intervention for Smokers Not Willing to Quit Smoking: a Randomised Control Trial

This study has been completed.
The University of Hong Kong
Information provided by:
Hospital Authority, Hong Kong Identifier:
First received: November 21, 2007
Last updated: October 22, 2013
Last verified: October 2013
The aims of this study are (1) to examine the effect of smoking reduction intervention (reduction counseling and nicotine replacement therapy, NRT) (a) on smoking cessation and (b) on reducing daily cigarette consumption among smokers not willing to quit smoking but want to reduce smoking, and (2) to examine the effect of adherence intervention in producing a higher (a) adherence rate, (b) reduction rate, and (c) quit rate.

Condition Intervention
Smoking Cessation
Procedure: Reduction Intervention + Adherence Intervention
Behavioral: Reduction Intervention
Procedure: control

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Single Group Assignment
Masking: Single Blind
Official Title: Smoking Reduction Intervention for Smokers Not Willing to Quit Smoking: a Randomised Control Trial

Resource links provided by NLM:

Further study details as provided by Hospital Authority, Hong Kong:

Primary Outcome Measures:
  • quit rate [ Time Frame: 6 months ]
  • Reduction Rate (reduction of cigarette consumption by at least 50% compared with baseline) [ Time Frame: 6 months ]
  • Adherence Rate to NRT [ Time Frame: 4 weeks ]

Secondary Outcome Measures:
  • Validated quit rate (by measuring exhaled CO and urinary cotinine level) [ Time Frame: 6 months ]
  • Quit rate without validation [ Time Frame: 1 month ]
  • self-reported use of NRT for at least 4 weeks or 8 weeks, without cotinine validation [ Time Frame: 1 month / 3 month ]

Estimated Enrollment: 3826
Study Start Date: October 2004
Study Completion Date: July 2006

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All

Inclusion Criteria:

  • Age 18 or above
  • Ethnic Chinese male or female
  • Smokes at least 2 cigarettes per day
  • Have no intention to quit in the near future
  • Intends to reduce smoking in the next 7 days
  • Has no contraindication to NRT

Exclusion Criteria:

  • Subjects who are psychologically or physically unable to communicate
  • Children and teenagers (age below 18)
  • Pregnant or intention to become pregnant within the next 6 months
  • Those on regular psychotropic medications and in the presence of any serious health problems that may make them unsuitable for using NRT, such as recent stroke, palpitation, or other life threatening conditions
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Please refer to this study by its identifier: NCT00563329

Hong Kong, China
Hong Kong Council on Smoking and Health
Hong Kong, China
The University of Hong Kong
Hong Kong, China
Sponsors and Collaborators
Hospital Authority, Hong Kong
The University of Hong Kong
Principal Investigator: TH Lam, Prof Department of Community Medicine, Faculty of Medicine, The University of Hong Kong
  More Information

Additional Information: Identifier: NCT00563329     History of Changes
Other Study ID Numbers: UW 03-103 T/103
Study First Received: November 21, 2007
Last Updated: October 22, 2013

Keywords provided by Hospital Authority, Hong Kong:
Smokers who are not willing to quit in the near future but intend to reduce smoking processed this record on May 25, 2017