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Telephone-based Treatment for Smoking Cessation

This study has been completed.
Stockholm County Council, Sweden
Information provided by:
Karolinska Institutet Identifier:
First received: May 10, 2010
Last updated: May 11, 2010
Last verified: September 2008

Aim: to assess the effect of adding Motivational Interviewing (MI) to the existing smoking cessation treatment protocol at the Swedish National Tobacco Quitline (SNTQ).

Methods: Experienced counsellors at SNTQ either received further training in the standard treatment (ST) protocol (including Cognitive Behavioural Therapy (CBT)) or a comprehensive regime of training in MI. 1309 clients were randomized to either the ST group or the group with MI added to the treatment protocol. In order to ensure treatment integrity among counsellors, MI skill was assessed using the Motivational Interviewing Treatment Integrity Code (MITI).

Condition Intervention Phase
Smoking Cessation
Behavioral: Standard treatment
Behavioral: Motivational Interviewing
Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single Blind (Participant)
Primary Purpose: Treatment
Official Title: Motivational Interviewing in Smoking Cessation: A Controlled Clinical Trial at the Swedish National Tobacco Quitline

Resource links provided by NLM:

Further study details as provided by Karolinska Institutet:

Primary Outcome Measures:
  • Point prevalence abstinence [ Time Frame: 12 months after initial contact with SNTQ ]
    Not one puff of smoke during the previous 7 days

Secondary Outcome Measures:
  • Continuous abstinence [ Time Frame: 12 months after initial contact with SNTQ ]
    Not a single puff of smoke within the past six months or more

Enrollment: 1309
Study Start Date: January 2005
Study Completion Date: October 2007
Primary Completion Date: October 2007 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Standard treatment Behavioral: Standard treatment

Telephone-based smoking cessation counselling based on a combination of coaching and cognitive behavioural therapy (CBT) techniques. Counsellors are also trained in giving tailored advice regarding the use of smoking cessation aids.

Clients are offered a choice between "reactive treatment" (clients initiate all contact) and "proactive treatment" (counsellors call back at appointed dates). Printed information material tailored to clients' needs is offered free of charge.

Experimental: Motivational Interviewing Behavioral: Motivational Interviewing

Telephone-based smoking cessation counselling with Motivational Interviewing added to the standard treatment protocol.

Clients are offered a choice between "reactive treatment" (clients initiate all contact) and "proactive treatment" (counsellors call back at appointed dates). Printed information material tailored to clients' needs is offered free of charge.


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Clients have to express a desire for support regarding smoking cessation
  • Clients have to be willing to confirm their identity by answering a baseline registration questionnaire

Exclusion Criteria:

  • Clients with obvious difficulties understanding Swedish
  • Clients with obvious mental impairments
  • Clients using tobacco products other than cigarettes (mainly smokeless tobacco, or "snus")
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Please refer to this study by its identifier: NCT01121887

Asgeir R. Helgason
Stockholm, Sweden, 10462
Sponsors and Collaborators
Karolinska Institutet
Stockholm County Council, Sweden
Principal Investigator: Asgeir R Helgason, PhD Karolinska Institutet
Study Director: Lars Forsberg, PhD Karolinska Institutet
  More Information

Additional Information:
Responsible Party: Asgeir R. Helgason & Lars Forsberg, Karolinska Institutet Identifier: NCT01121887     History of Changes
Other Study ID Numbers: CAN046684 / LS04010116
CAF2006-ASG ( Other Grant/Funding Number: Cancerfonden )
Study First Received: May 10, 2010
Last Updated: May 11, 2010

Keywords provided by Karolinska Institutet:
smoking cessation
telephone counselling
motivational interviewing
treatment integrity
Tobacco Smoking processed this record on May 25, 2017