Reach and uptake of Internet- and phone-based smoking cessation interventions: results from a randomized controlled trial.

OBJECTIVE: To study whether demographic and smoking-related characteristics are associated with participation (reach) in a smoking cessation trial and subsequent use (uptake) of two specific smoking interventions (Internet-based program and proactive telephone counseling). METHODS: We used data from a four-arm randomized smoking cessation trial (2011). Participants (n=1,809) were recruited among 9,924 smokers who previously participated in two health surveys in Denmark (2007-2008 and 2010). Interventions were as follows: (1) an Internet-based smoking cessation program, (2) proactive telephone counseling, (3) reactive telephone counseling and (4) a self-help booklet. RESULTS: Reach (defined as the proportion accepting to participate in the trial of those invited) was highest among persons aged 40-59 years, women, heavy smokers and persons with long education. Among trial participants, uptake (defined as any use of the specific intervention at 1-month follow-up) was 69% for the Internet-based program, 74% and 9% for proactive and reactive telephone counseling, respectively, and 84% for the self-help booklet. Young age was associated with the uptake of the Internet-based program, and short education was associated with using proactive telephone counseling. CONCLUSIONS: Internet-based interventions and proactive telephone counseling appeal to different age and educational groups. Further, offering similar intervention content by a proactive and a reactive approach can be associated with different intervention uptake.

Comparing tailored and untailored text messages for smoking cessation: a randomized controlled trial among adolescent and young adult smokers.

The aim was to compare the effectiveness of untailored text messages for smoking cessation to tailored text messages delivered at a higher frequency. From February 2007 to August 2009, 2030 users of an internet-based smoking cessation program with optional text message support aged 15-25 years were consecutively randomized to versions of the program that offered either tailored or untailored text messages. Thirty-day point abstinence from smoking was measured self-reportedly at 12-months follow-up. Response rates were 36.3% and 38.1% in the tailored and untailored group, respectively. We analyzed the entire study population, as well as those opting for text messages (n = 1619). In intention-to-treat analysis with multiple imputation of missing data, the odds ratio for 30-day point abstinence was 1.28 (95% CI 0.91-2.08) for the tailored compared with untailored messages. When restricting the analysis to those who had chosen to receive text messages, the corresponding odds ratio was 1.45 (95% CI 1.01-2.08). The higher long-term quit rates in the group receiving the tailored text messages compared with untailored text messages in the restricted analysis indicated that tailoring and higher frequency of text messages increases quit rates among young smokers.