The effectiveness of telephone counselling and internet- and text-message-based support for smoking cessation: results from a randomized controlled trial.

Abstract

To compare the effectiveness of proactive telephone counselling, reactive telephone counselling and an internet- and text-message-based intervention with a self-help booklet for smoking cessation. A randomized controlled trial with equal allocation to four conditions: (1) proactive telephone counselling (n=452), (2) reactive telephone counselling (n=453), (3) internet- and text-message-based intervention (n=453) and (4) self-help booklet (control) (n=452). Denmark. Smokers who had participated previously in two national health surveys were invited. Eligibility criteria were daily cigarette smoking, age≥16years, having a mobile phone and e-mail address. Primary outcome was prolonged abstinence to 12months from the end of the intervention period. At 12-month follow-up, higher prolonged abstinence was found in the proactive telephone counselling group compared with the booklet group [7.3 versus 3.6%, odds ratio (OR)=2.2, 95% confidence interval (CI)=1.2-4.0]. There was no clear evidence of a difference in prolonged abstinence between the reactive telephone counselling group or the internet-based smoking cessation program and the booklet group: 1.8 versus 3.6%, OR=0.8, 95% CI=0.6-1.2 and 5.3 versus 3.6%, OR=1.6, 95% CI=0.8-3.0, respectively. In the proactive telephone counselling group, the cost per additional 12-month quitter compared with the booklet group was £644. Proactive telephone counselling was more effective than a self-help booklet in achieving prolonged abstinence for 12months. No clear evidence of an effect of reactive telephone counselling or the internet- and text-message-based intervention was found compared with the self-help booklet.