scholarly journals Effectiveness of Message Frame-Tailoring in a Web-Based Smoking Cessation Program: Randomized Controlled Trial

10.2196/17251 ◽  
2020 ◽  
Vol 22 (4) ◽  
pp. e17251 ◽  
Author(s):  
Maria Altendorf ◽  
Ciska Hoving ◽  
Julia CM Van Weert ◽  
Eline Suzanne Smit
Keyword(s):  
Randomized Controlled Trial ◽  
Smoking Cessation ◽  
Controlled Trial ◽  
Communication Style ◽  
Smoking Abstinence ◽  
Randomized Controlled ◽  
Tailored Interventions ◽  
Tailored Messages ◽  
Quit Smoking ◽  
Message Frame

Background The content of online computer-tailored interventions is often determined to match an individual’s characteristics, beliefs, and behavioral factors. These content-tailored interventions lead to better message processing and a higher likelihood of behavior change such as smoking cessation. However, a meta-analysis of online computer-tailored interventions showed that effect sizes, albeit positive, remain small, suggesting room for improvement. A promising strategy to enhance the effectiveness of online computer-tailored interventions is to tailor the message frame (ie, how a message is communicated) based on the preferred communication style of the user in addition to content-tailoring. One factor that determines an individual’s communication style preference is the need for autonomy; some individuals prefer an autonomy-supportive communication style (offering choice and use of suggestive language), whereas others might prefer a directive communication style, which is replete with imperatives and does not provide choice. Tailoring how messages are presented (eg, based on the need for autonomy) is called message frame-tailoring. Objective The aim of the present study was to test the effectiveness of message frame-tailoring based on the need for autonomy, in isolation and in combination with content-tailoring, within the context of an online computer-tailored smoking cessation intervention. The primary outcome measure was the 7-day point-prevalence of smoking abstinence. Secondary outcomes were perceived message relevance, self-determined motivation to quit smoking, and sociocognitive beliefs. Methods A randomized controlled trial with a 2 (message frame-tailoring vs no message frame-tailoring) by 2 (content-tailoring vs no content-tailoring) design was conducted among adult smokers intending to quit smoking (N=273). Results Structural equation modeling revealed that the content-tailored condition increased smoking abstinence rates 1 month after the start of the intervention (beta=.57, P=.02). However, neither message frame-tailoring nor its interaction with content-tailoring significantly predicted smoking abstinence. In our model, message frame-tailoring, content-tailoring, as well as their interaction significantly predicted perceived relevance of the smoking cessation messages, which consequently predicted self-determined motivation. In turn, self-determined motivation positively affected attitudes and self-efficacy for smoking cessation, but only self-efficacy consequently predicted smoking abstinence. Participants in the control condition perceived the highest level of message relevance (mean 4.78, SD 1.27). However, messages that were frame-tailored for individuals with a high need for autonomy in combination with content-tailored messages led to significantly higher levels of perceived message relevance (mean 4.83, SD 1.03) compared to those receiving content-tailored messages only (mean 4.24, SD 1.05, P=.003). Conclusions Message frame-tailoring based on the need for autonomy seems to be an effective addition to conventional content-tailoring techniques in online smoking cessation interventions for people with a high need for autonomy; however, this is not effective in its current form for people with a low need for autonomy. Trial Registration Dutch Trial Register (NL6512/NRT-6700); https://www.trialregister.nl/trial/6512

scholarly journals Effectiveness of Message Frame-Tailoring in a Web-Based Smoking Cessation Program: Randomized Controlled Trial (Preprint)

2019 ◽  
Author(s):  
Maria Altendorf ◽  
Ciska Hoving ◽  
Julia CM Van Weert ◽  
Eline Suzanne Smit
Keyword(s):  
Randomized Controlled Trial ◽  
Smoking Cessation ◽  
Controlled Trial ◽  
Communication Style ◽  
Smoking Abstinence ◽  
Randomized Controlled ◽  
Tailored Interventions ◽  
Tailored Messages ◽  
Quit Smoking ◽  
Message Frame

BACKGROUND The content of online computer-tailored interventions is often determined to match an individual’s characteristics, beliefs, and behavioral factors. These content-tailored interventions lead to better message processing and a higher likelihood of behavior change such as smoking cessation. However, a meta-analysis of online computer-tailored interventions showed that effect sizes, albeit positive, remain small, suggesting room for improvement. A promising strategy to enhance the effectiveness of online computer-tailored interventions is to tailor the message frame (ie, how a message is communicated) based on the preferred communication style of the user in addition to content-tailoring. One factor that determines an individual’s communication style preference is the need for autonomy; some individuals prefer an autonomy-supportive communication style (offering choice and use of suggestive language), whereas others might prefer a directive communication style, which is replete with imperatives and does not provide choice. Tailoring how messages are presented (eg, based on the need for autonomy) is called message frame-tailoring. OBJECTIVE The aim of the present study was to test the effectiveness of message frame-tailoring based on the need for autonomy, in isolation and in combination with content-tailoring, within the context of an online computer-tailored smoking cessation intervention. The primary outcome measure was the 7-day point-prevalence of smoking abstinence. Secondary outcomes were perceived message relevance, self-determined motivation to quit smoking, and sociocognitive beliefs. METHODS A randomized controlled trial with a 2 (message frame-tailoring vs no message frame-tailoring) by 2 (content-tailoring vs no content-tailoring) design was conducted among adult smokers intending to quit smoking (N=273). RESULTS Structural equation modeling revealed that the content-tailored condition increased smoking abstinence rates 1 month after the start of the intervention (beta=.57, <i>P</i>=.02). However, neither message frame-tailoring nor its interaction with content-tailoring significantly predicted smoking abstinence. In our model, message frame-tailoring, content-tailoring, as well as their interaction significantly predicted perceived relevance of the smoking cessation messages, which consequently predicted self-determined motivation. In turn, self-determined motivation positively affected attitudes and self-efficacy for smoking cessation, but only self-efficacy consequently predicted smoking abstinence. Participants in the control condition perceived the highest level of message relevance (mean 4.78, SD 1.27). However, messages that were frame-tailored for individuals with a high need for autonomy in combination with content-tailored messages led to significantly higher levels of perceived message relevance (mean 4.83, SD 1.03) compared to those receiving content-tailored messages only (mean 4.24, SD 1.05, <i>P</i>=.003). CONCLUSIONS Message frame-tailoring based on the need for autonomy seems to be an effective addition to conventional content-tailoring techniques in online smoking cessation interventions for people with a high need for autonomy; however, this is not effective in its current form for people with a low need for autonomy. CLINICALTRIAL Dutch Trial Register (NL6512/NRT-6700); https://www.trialregister.nl/trial/6512

scholarly journals Smoking cessation with smartphone applications (SWAPP): study protocol for a randomized controlled trial

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Janina Lüscher ◽  
Corina Berli ◽  
Philipp Schwaninger ◽  
Urte Scholz
Keyword(s):  
Randomized Controlled Trial ◽  
Smoking Cessation ◽  
Outcome Measures ◽  
Controlled Trial ◽  
Secondary Outcome ◽  
Control Group ◽  
Smoking Abstinence ◽  
Smartphone Apps ◽  
Randomized Controlled ◽  
Quit Smoking

Abstract Background Tobacco smoking remains one of the biggest public health threats. Smartphone apps offer new promising opportunities for supporting smoking cessation in real-time. The social context of smokers has, however, been neglected in smartphone apps promoting smoking cessation. This randomized controlled trial investigates the effectiveness of a smartphone app in which smokers quit smoking with the help of a social network member. Methods This protocol describes the design of a single-blind, two-arm, parallel-group, intensive longitudinal randomized controlled trial. Participants of this study are adult smokers who smoke at least one cigarette per day and intend to quit smoking at a self-set quit date. Blocking as means of group-balanced randomization is used to allocate participants to intervention or control conditions. Both intervention and control group use a smartphone-compatible device for measuring their daily smoking behavior objectively via exhaled carbon monoxide. In addition, the intervention group is instructed to use the SmokeFree Buddy app, a multicomponent app that also facilitates smoking-cessation specific social support from a buddy over a smartphone application. All participants fill out a baseline diary for three consecutive days and are invited to the lab for a background assessment. They subsequently participate in an end-of-day diary phase from 7 days before and until 20 days after a self-set quit date. Six months after the self-set quit date a follow-up diary for three consecutive days takes place. The primary outcome measures are daily self-reported and objectively-assessed smoking abstinence and secondary outcome measures are daily self-reported number of cigarettes smoked. Discussion This is the first study examining the effectiveness of a smoking cessation mobile intervention using the SmokeFree Buddy app compared to a control group in a real-life setting around a self-set quit date using a portable objective measure to assess smoking abstinence. Opportunities and challenges with running studies with smoking participants and certain design-related decisions are discussed. Trial registration This trial was prospectively registered on 04/04/2018 at ISRCTNregistry: ISRCTN11154315.

scholarly journals Prospective, Randomized, Controlled Trial Using Best-Selling Smoking-Cessation Book

2017 ◽  
Vol 96 (7) ◽  
pp. 258-263
Author(s):  
James P. Foshee ◽  
Anita Oh ◽  
Adam Luginbuhl ◽  
Joseph Curry ◽  
William Keane ◽  
...  
Keyword(s):  
Randomized Controlled Trial ◽  
Smoking Cessation ◽  
Controlled Trial ◽  
Smoking Cessation Counseling ◽  
Randomized Controlled ◽  
Quit Smoking ◽  
Stop Smoking ◽  
Prospective Randomized Controlled Trial

Our prospective, randomized, controlled trial aimed to evaluate the efficacy of the self-help book, The Easy Way to Stop Smoking, by Allen Carr, in promoting smoking cessation in patients with head and neck cancer. We assessed active smokers for their willingness to read a smoking cessation book. Participants were randomized to either receive the book from our department or recommended to purchase the book. All patients received smoking cessation counseling at recruitment. Phone surveys were conducted at short- and long-term intervals to determine if the patients had purchased and/or read the book and whether they were still smoking. One hundred twelve patients were recruited, 52 of whom completed follow-up surveys. Those who received the book for free were more likely to read the book (p = 0.05). Reading the book did not correlate with successful smoking cessation (p = 0.81). Some 26% of the 27 patients who received the book quit smoking compared with 32% of the 25 patients who were recommended the book (p = 0.76). Patients who indicated motivation to quit smoking were more likely to succeed. In our study, smoking cessation did not appear to be influenced by reading The Easy Way to Stop Smoking. Despite 80.8% of the cohort indicating at least a readiness to quit smoking at recruitment, only 28.8% of patients managed to achieve successful smoking cessation at long-term follow-up. Patient motivation remains an important factor in achieving long-term smoking abstinence. Quitting smoking remains a daunting challenge for patients, with multiple interventions likely needed to achieve cessation.

scholarly journals Effectiveness of a Dyadic Buddy App for Smoking Cessation: Randomized Controlled Trial

10.2196/27162 ◽  
2021 ◽  
Vol 23 (9) ◽  
pp. e27162
Author(s):  
Philipp Schwaninger ◽  
Corina Berli ◽  
Urte Scholz ◽  
Janina Lüscher
Keyword(s):  
Randomized Controlled Trial ◽  
Smoking Cessation ◽  
Controlled Trial ◽  
Intervention Group ◽  
The Self ◽  
Daily Smoking ◽  
Control Group ◽  
Smoking Abstinence ◽  
Self Monitoring ◽  
Randomized Controlled

Background Tobacco smoking is one of the biggest public health threats. Smartphone apps offer new promising opportunities for supporting smoking cessation in real time. This randomized controlled trial investigated the effectiveness of an app that encourages individuals to quit smoking with the help of a social network member (buddy) in daily life. Objective The objective of this study is to test the effectiveness of the SmokeFree buddy app compared with a control group with self-reported smoking abstinence and carbon monoxide (CO)–verified smoking abstinence as primary outcomes and self-reports of smoked cigarettes per day (CPD) as a secondary outcome. Methods A total of 162 adults who smoked participated in this single-blind, two-arm, parallel-group, intensive longitudinal randomized controlled trial. Around a self-set quit date (ie, 7 days before the self-set quit date and 20 days after) and 6 months later, participants of the intervention and control groups reported on daily smoking abstinence and CPD in end-of-day diaries. Daily smoking abstinence was verified via daily exhaled CO assessments. This assessment was administered via an app displaying results of exhaled CO, thus addressing self-monitoring in both groups. In addition, participants in the intervention group used the SmokeFree buddy app, a multicomponent app that facilitates social support from a buddy of choice. Results A significant reduction in CPD from baseline to the 6-month follow-up was observed among participants in both groups. Multilevel analyses revealed no significant intervention effect on self-reported and CO-verified daily smoking abstinence at the quit date and 3 weeks later. However, CPD was lower at the quit date and 3 weeks later in the intervention group than in the control group. No significant differences between groups were found for any outcome measures 6 months after the quit date. Overall, low app engagement and low perceived usefulness were observed. Conclusions Despite some encouraging short-term findings on the amount of smoking, the SmokeFree buddy app did not have beneficial effects on smoking abstinence over and above the self-monitoring control condition. Future studies should examine whether and what support processes can be effectively stimulated and how app use can be improved to better achieve this goal. Trial Registration ISRCTN Registry 11154315; https://www.isrctn.com/ISRCTN11154315 International Registered Report Identifier (IRRID) RR2-10.1186/s12889-019-7723-z

scholarly journals Effectiveness of a Dyadic Buddy App for Smoking Cessation: Randomized Controlled Trial (Preprint)

2021 ◽  
Author(s):  
Philipp Schwaninger ◽  
Corina Berli ◽  
Urte Scholz ◽  
Janina Lüscher
Keyword(s):  
Randomized Controlled Trial ◽  
Smoking Cessation ◽  
Controlled Trial ◽  
Intervention Group ◽  
The Self ◽  
Daily Smoking ◽  
Control Group ◽  
Smoking Abstinence ◽  
Self Monitoring ◽  
Randomized Controlled

BACKGROUND Tobacco smoking is one of the biggest public health threats. Smartphone apps offer new promising opportunities for supporting smoking cessation in real time. This randomized controlled trial investigated the effectiveness of an app that encourages individuals to quit smoking with the help of a social network member (<i>buddy</i>) in daily life. OBJECTIVE The objective of this study is to test the effectiveness of the SmokeFree buddy app compared with a control group with self-reported smoking abstinence and carbon monoxide (CO)–verified smoking abstinence as primary outcomes and self-reports of smoked cigarettes per day (CPD) as a secondary outcome. METHODS A total of 162 adults who smoked participated in this single-blind, two-arm, parallel-group, intensive longitudinal randomized controlled trial. Around a self-set quit date (ie, 7 days before the self-set quit date and 20 days after) and 6 months later, participants of the intervention and control groups reported on daily smoking abstinence and CPD in end-of-day diaries. Daily smoking abstinence was verified via daily exhaled CO assessments. This assessment was administered via an app displaying results of exhaled CO, thus addressing self-monitoring in both groups. In addition, participants in the intervention group used the SmokeFree buddy app, a multicomponent app that facilitates social support from a buddy of choice. RESULTS A significant reduction in CPD from baseline to the 6-month follow-up was observed among participants in both groups. Multilevel analyses revealed no significant intervention effect on self-reported and CO-verified daily smoking abstinence at the quit date and 3 weeks later. However, CPD was lower at the quit date and 3 weeks later in the intervention group than in the control group. No significant differences between groups were found for any outcome measures 6 months after the quit date. Overall, low app engagement and low perceived usefulness were observed. CONCLUSIONS Despite some encouraging short-term findings on the amount of smoking, the SmokeFree buddy app did not have beneficial effects on smoking abstinence over and above the self-monitoring control condition. Future studies should examine whether and what support processes can be effectively stimulated and how app use can be improved to better achieve this goal. CLINICALTRIAL ISRCTN Registry 11154315; https://www.isrctn.com/ISRCTN11154315 INTERNATIONAL REGISTERED REPORT RR2-10.1186/s12889-019-7723-z

scholarly journals Exploring the Experiences of Individuals Allocated to a Control Setting: Findings From a Mobile Health Smoking Cessation Trial (Preprint)

2018 ◽  
Author(s):  
Ulrika Müssener ◽  
Catharina Linderoth ◽  
Marcus Bendtsen
Keyword(s):  
Randomized Controlled Trial ◽  
Smoking Cessation ◽  
University Students ◽  
Mobile Health ◽  
Controlled Trial ◽  
Text Messages ◽  
Control Group ◽  
Free Text ◽  
Randomized Controlled ◽  
Quit Smoking

BACKGROUND Tobacco smoking is the primary cause of preventable premature disease and death worldwide. Evidence of the efficacy of text messaging interventions to reduce smoking behavior is well established, but there is still a need for studies targeting young people, especially because young adult smokers are less likely to seek treatment than older adults. A mobile health intervention, Nicotine Exit (NEXit), targeting smoking among university students was developed to support university students to quit smoking. Short-term effectiveness was measured through a randomized controlled trial, which found that immediately after the 12-week intervention, 26% of smokers in the intervention group had prolonged abstinence compared with 15% in the control group. OBJECTIVE The objective of this study was to explore the experience of being allocated to the control group in the NEXit smoking cessation intervention. METHODS We asked students who were allocated to the control group in the main NEXit randomized controlled trial to report their experiences. An email was sent to the participants with an electronic link to a short questionnaire. We assessed the distribution of the responses to the questionnaire by descriptive analysis. We analyzed free-text comments to 4 questions. RESULTS The response rate for the questionnaire was 33.8% (258/763), and we collected 143 free-text comments. Of the responders, 60.9% (157/258) experienced frustration, disappointment, and irritation about being allocated to the control group; they felt they were being denied support by having to wait for the intervention. Monthly text messages during the waiting period thanking them for taking part in the trial were perceived as negative by 72.3% (189/258), but for some the messages served as a reminder about the decision to quit smoking. Of the responders, 61.2% (158/258) chose to wait to quit smoking until they had access to the intervention, and 29.8% (77/258) decided to try to quit smoking without support. Of the respondents, 77.5% (200/258) claimed they were still smoking and had signed up or were thinking about signing up for the smoking cessation program at the time of the questionnaire. CONCLUSIONS Most of the respondents reported negative feelings about having to wait for the support of the intervention and that they had decided to continue smoking. A similar number decided to wait to quit smoking until they had access to the intervention, and these respondents reported a high interest in the intervention. Free-text comments indicated that some control group participants believed that they had been excluded from the trial, while others were confused when asked to sign up for the intervention again. CLINICALTRIAL ISRCTN Registry ISRCTN75766527; http://www.isrctn.com/ISRCTN75766527 (Archived by WebCite at http://www.webcitation.org/7678sUKbR)

scholarly journals Mobile Phone–Based Smoking-Cessation Intervention for Patients Undergoing Elective Surgery: Protocol for a Randomized Controlled Trial (Preprint)

2018 ◽  
Author(s):  
Marcus Bendtsen ◽  
Catharina Linderoth ◽  
Preben Bendtsen
Keyword(s):  
Randomized Controlled Trial ◽  
Smoking Cessation ◽  
Mobile Phone ◽  
Elective Surgery ◽  
Controlled Trial ◽  
Smoking Cessation Intervention ◽  
Care Clinic ◽  
Randomized Controlled ◽  
Quit Smoking ◽  
Cessation Intervention

BACKGROUND Several large studies have shown that the risk of cardiovascular, respiratory, and wound-healing complications (including death) within 30 days of surgery is greater for smokers than for nonsmokers. However, there is evidence that even short-term perioperative smoking cessation may reduce postoperative morbidity. Over the past few years, it has become more evident that short message service (SMS)–based interventions can help individuals quit smoking. OBJECTIVE The overall aim of this project is to fill the knowledge gap on whether an SMS-based smoking-cessation intervention can be effective in helping patients stop smoking perioperatively. The aim of this trial is to evaluate the effectiveness of an SMS-based intervention on smoking behavior of patients undergoing elective surgery. METHODS A two-arm parallel-group randomized controlled trial will be conducted at 20 surgical departments in southeast Sweden. Smokers undergoing elective surgery who own a mobile phone will be included. Power calculations indicate that it will be necessary to randomize 434 participants. One group will be given access to a novel 12-week SMS program, which includes daily SMS messages with behavior change–enforcing text content and hyperlinks to interactive modules, while the other group will not be given access to the intervention. Both groups will have access to the surgical departments’ current routine for smoking cessation prior to surgery. Primary outcome measures, prolonged abstinence, and point prevalence of smoking cessation will be measured through questionnaires at 3, 6, and 12 months after randomization. Logistic regression models adjusted using baseline characteristics will be explored to identify potential effects of the intervention. RESULTS Recruitment started in late October 2018 and is expected to last for a maximum of 30 months. The first results are expected to be available approximately 3 months after the final date of recruitment. CONCLUSIONS Owing to the structural problems and scarcity of time and resources, patients at most Swedish surgical departments are simply instructed to quit smoking, and perhaps, referred to a primary health care clinic. An SMS-based smoking-cessation aid can be effective in helping individuals quit smoking and is a very simple and time-efficient tool for surgical departments to use. CLINICALTRIAL ISRCTN Registry ISRCTN33869008; http://www.isrctn.com/ISRCTN33869008 INTERNATIONAL REGISTERED REPOR PRR1-10.2196/12511

scholarly journals Prospective, Randomized, Controlled Trial using Best-Selling Smoking-Cessation Book

2017 ◽  
Vol 96 (7) ◽  
pp. 258-262
Author(s):  
James P. Foshee ◽  
Anita Oh ◽  
Adam Luginbuhl ◽  
Joseph Curry ◽  
William Keane ◽  
...  
Keyword(s):  
Randomized Controlled Trial ◽  
Smoking Cessation ◽  
Controlled Trial ◽  
Smoking Cessation Counseling ◽  
Randomized Controlled ◽  
Quit Smoking ◽  
Stop Smoking ◽  
Prospective Randomized Controlled Trial

Our prospective, randomized, controlled trial aimed to evaluate the efficacy of the self-help book, The Easy Way to Stop Smoking, by Allen Carr, in promoting smoking cessation in patients with head and neck cancer. We assessed active smokers for their willingness to read a smoking cessation book. Participants were randomized to either receive the book from our department or recommended to purchase the book. All patients received smoking cessation counseling at recruitment. Phone surveys were conducted at short- and long-term intervals to determine if the patients had purchased and/or read the book and whether they were still smoking. One hundred twelve patients were recruited, 52 of whom completed follow-up surveys. Those who received the book for free were more likely to read the book (p = 0.05). Reading the book did not correlate with successful smoking cessation (p = 0.81). Some 26% of the 27 patients who received the book quit smoking compared with 32% of the 25 patients who were recommended the book (p = 0.76). Patients who indicated motivation to quit smoking were more likely to succeed. In our study, smoking cessation did not appear to be influenced by reading The Easy Way to Stop Smoking. Despite 80.8% of the cohort indicating at least a readiness to quit smoking at recruitment, only 28.8% of patients managed to achieve successful smoking cessation at long-term follow-up. Patient motivation remains an important factor in achieving long-term smoking abstinence. Quitting smoking remains a daunting challenge for patients, with multiple interventions likely needed to achieve cessation.

scholarly journals COach2Quit: A Pilot Randomized Controlled Trial of a Personal Carbon Monoxide Monitor for Smoking Cessation

2018 ◽  
Vol 21 (11) ◽  
pp. 1573-1577 ◽  
Author(s):  
Nandita Krishnan ◽  
Jessica L Elf ◽  
Sandy Chon ◽  
Jonathan E Golub
Keyword(s):  
Carbon Monoxide ◽  
Randomized Controlled Trial ◽  
Smoking Cessation ◽  
Controlled Trial ◽  
Randomized Controlled ◽  
Quit Smoking ◽  
Motivation To Quit ◽  
Brief Advice ◽  
Median Change

Abstract Introduction Mobile phone–based messaging support and biomarker feedback independently show evidence of increasing an individual’s likelihood of quitting smoking. However, the combination of these two strategies to facilitate smoking cessation has not been adequately explored. Methods We conducted a randomized controlled trial in Baltimore, Maryland, to assess the efficacy of COach2Quit, a smartphone application that provides exhaled carbon monoxide readings with message support. The primary outcome was self-reported and biochemically verified smoking cessation at 30-day follow-up. Secondary outcomes were reduction in smoking, motivation to quit, and engagement and satisfaction with COach2Quit. An intention-to-treat analysis was conducted. Results Adult smokers were randomized 1:1 to receive brief advice and COach2Quit (intervention, n = 50) or brief advice only (control, n = 52). Thirteen participants were lost to follow-up. At 30-day follow-up, one participant in each arm quit smoking. Median change in carbon monoxide levels (in parts per million (ppm)) (intervention: −3.0 [interquartile range (IQR) −12.0, 2.0]; control: −2.5 [IQR −9.0, 2.0]) and median change in number of cigarettes smoked per day (intervention: −5.5 [IQR −14.0, −1.0]; control: −6.0 [IQR −10.0, −2.0]) was similar between study arms. There was no significant difference in mean percent change in the Reasons for Quitting scale score (intervention: 6.3 [95% confidence interval = −2.2% to 14.8%]; control: −3.6 [95% confidence interval = −9.2% to 2.1%]). A majority (n = 32, 91%) of participants liked having COach2Quit to help them quit smoking. Conclusions There were no significant differences in smoking cessation, smoking reduction, and motivation to quit between study arms. However, high satisfaction with the COach2Quit application indicates its feasibility and acceptability as a smoking cessation tool. Implications Smoking is the leading preventable cause of morbidity and mortality in the United States. Although counseling and pharmacotherapy are efficacious for smoking cessation, they are not easily accessible or desirable to all smokers, highlighting the need for identifying other interventions. There is evidence for the efficacy of mobile phone–based messaging support for smoking cessation. However, there is limited research on the efficacy of biomarker feedback, much less interventions that combine these two approaches. This research contributes to filling this gap and identifying novel interventions to facilitate smoking cessation.

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