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Smartphone Interventions to Help You Quit Smoking

This study is looking at how smartphone messages can help people reduce their smoking. Researchers want to see if messages sent to your phone, which suggest ways to cope with smoking urges, can help you smoke fewer cigarettes. They will also check how easy these messages are to use. To join, you need to be between 18 and 40 years old, live in the U.S., own a smartphone, and currently smoke at least three cigarettes a day. The study aims to enroll 7 participants. The current status of the study is unclear.

Study design
This is an interventional study with a planned enrollment of 7 participants. It is testing smartphone-based intervention messages.
What's involved
You would participate in the study for 44 days. You would also give the research team access to your phone's GPS data.
Compensation
Not stated in the trial record.
Follow-up
Your smoking habits and how easy the system is to use will be checked at a 45-day follow-up.

AI-generated from the public study record. Only the study team can confirm whether you're eligible — confirm details with them before making decisions.

NCT07585357

Adaptive Mobile Interventions to Reduce Cancer Risk Behaviors

Recruiting
NAAges 18–40InterventionalTreatment
Johns Hopkins Bloomberg School of Public Health
~7 participants
Updated 2026-07-27 on ClinicalTrials.gov
What's tested:Smartphone-based intervention messages

At a glance

Recruiting sites
1 of 1 listed site is recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
Change in smoking urge as assessed by a single item
Measured over 15 minutes after message delivery
+2 more outcomes measured

Conditions

Smoking Cessation

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Smoking Cessation

Where it's being run

1 sites across 1 states
Maryland1

Study leadership

  • Johannes Thrul, PhD · PRINCIPAL_INVESTIGATOR · Johns Hopkins Bloomberg School of Public Health

Who to contact

Johannes Thrul, PhD
[email protected]
443-318-6633
Email the study team

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Eligibility criteria

Inclusion

live in the U.S.;
are between 18 and 40 years of age;
own a smartphone with iOS and Android operating system and GPS capabilities;
are carrying smartphone every day;
are willing to participate in the study for 44 days and give the research team access to the phone GPS data;
have smoked ≥100 cigarettes in the participant's life and currently smoke at least 3 cigarettes per day on 5 or more days of the week;
are planning to quit smoking within the next 30 days.

Exclusion

None

What this trial measures

  • Change in smoking urge as assessed by a single item15 minutes after message delivery

    The primary outcome will be change in participants' rating of smoking urge in EMA-post surveys, prompted 15 minutes after intervention message delivery, and controlling for the ratings in EMA-pre surveys. Urge will be assessed by a single item on a 5-point scale, ranging from 1-5; (1-very low, to 5-very high).

  • Change in cigarettes smoked per day in past week as assessed by a single itemBaseline, 45-day follow-up

    The primary outcome will be change in self-reported number of cigarettes smoked per day in the past week from baseline to 45-day follow-up.

  • System Usability as assessed by the System Usability Scale (SUS)45-day follow-up

    The primary outcome will be assessment of the intervention app usability assessed by a slightly modified version of the 10-item System Usability Scale ("system" wording changed to "app"). Each item is assessed on a 5-point scale from 1 (strongly disagree) to 5 (strongly agree). The SUS total score ranges from 0-100, with higher scores indicating greater usability.