Effectiveness of a stepped primary care smoking cessation intervention: cluster randomized clinical trial (ISTAPS study)

Addiction. 2011 Sep;106(9):1696-706. doi: 10.1111/j.1360-0443.2011.03491.x. Epub 2011 Jul 22.

Abstract

Aim: To evaluate the effectiveness in primary care of a stepped smoking cessation intervention based on the transtheoretical model of change.

Design: Cluster randomized trial; unit of randomization: basic care unit (family physician and nurse who care for the same group of patients); and intention-to-treat analysis.

Setting: All interested basic care units (n = 176) that worked in 82 primary care centres belonging to the Spanish Preventive Services and Health Promotion Research Network in 13 regions of Spain.

Participants: A total of 2,827 smokers (aged 14-85 years) who consulted a primary care centre for any reason, provided written informed consent and had valid interviews.

Measurements: The outcome variable was the 1-year continuous abstinence rate at the 2-year follow-up. The main variable was the study group (intervention/control). Intervention involved 6-month implementation of recommendations from a Clinical Practice Guideline which included brief motivational interviews for smokers at the precontemplation-contemplation stage, brief intervention for smokers in preparation-action who do not want help, intensive intervention with pharmacotherapy for smokers in preparation-action who want help and reinforcing intervention in the maintenance stage. Control group involved usual care. Among others, characteristics of tobacco use and motivation to quit variables were also collected.

Findings: The 1-year continuous abstinence rate at the 2-year follow-up was 8.1% in the intervention group and 5.8% in the control group (P = 0.014). In the multivariate logistic regression, the odds of quitting of the intervention versus control group was 1.50 (95% confidence interval = 1.05-2.14).

Conclusions: A stepped smoking cessation intervention based on the transtheoretical model significantly increased smoking abstinence at a 2-year follow-up among smokers visiting primary care centres.

Trial registration: ClinicalTrials.gov NCT00125905.

Publication types

  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Aged, 80 and over
  • Antidepressive Agents, Second-Generation / therapeutic use
  • Breath Tests
  • Bupropion / therapeutic use
  • Carbon Monoxide / analysis
  • Chewing Gum
  • Cluster Analysis
  • Counseling
  • Female
  • Humans
  • Intention to Treat Analysis
  • Male
  • Middle Aged
  • Motivation
  • Nicotine / therapeutic use
  • Nicotinic Agonists / therapeutic use
  • Primary Health Care*
  • Program Evaluation / statistics & numerical data
  • Psychological Theory
  • Smoking / epidemiology
  • Smoking / psychology
  • Smoking / therapy*
  • Smoking Cessation / methods*
  • Smoking Cessation / psychology
  • Smoking Cessation / statistics & numerical data
  • Social Class
  • Spain / epidemiology
  • Spouses / statistics & numerical data
  • Time Factors
  • Transdermal Patch
  • Treatment Outcome
  • Young Adult

Substances

  • Antidepressive Agents, Second-Generation
  • Chewing Gum
  • Nicotinic Agonists
  • Bupropion
  • Nicotine
  • Carbon Monoxide

Associated data

  • ClinicalTrials.gov/NCT00125905