Effectiveness of the German National Quitline for Smoking Cessation - a Randomized Controlled Trial

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

DRKS

Registry ID

DRKS00025343

Enrollment

910

Registered

2021-06-07

Start date

2021-10-06

Completion date

Unknown

Last updated

2025-04-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

F17

Interventions

Group 1: Intervention group: telephone counselling provided by the German National Quitline - proactive counselling - maximum of six telephone calls - behavioral-cognitive counselling - Motivational I

Eligibility

Sex/Gender

All

Age

18 Years to No maximum

Inclusion criteria

Inclusion criteria: (1) at least 18 years old; (2) daily smokers; (3) willing to quit smoking

Exclusion criteria

Exclusion criteria: no exclusion criteria

Design outcomes

Primary

Measure	Time frame
Abstinence (sustained and point-prevalences): Assessment by standardized (online) questionnaires in a pre-post follow-up design (baseline, 3 and 12 months after the start of the intervention): (1) sustained abstinence between post-measurement (3 months) and follow-up measurement (12 months); (2) 7-day point prevalence abstinence at post-measurement and follow-up measurement; (3) 24-hours point prevalence abstinence at post-measurement and follow-up measurement.	—

Measure

Time frame

Abstinence (sustained and point-prevalences): Assessment by standardized (online) questionnaires in a pre-post follow-up design (baseline, 3 and 12 months after the start of the intervention): (1) sustained abstinence between post-measurement (3 months) and follow-up measurement (12 months); (2) 7-day point prevalence abstinence at post-measurement and follow-up measurement; (3) 24-hours point prevalence abstinence at post-measurement and follow-up measurement.

—

Secondary

Measure	Time frame
Smoking-related variables: Assessment by standardized (online) questionnaires in a pre-post follow-up design (baseline, 3 and 12 months after the start of the intervention): (1) reduction in the number of cigarettes smoked per day; (2) occurrence of abstinence of at least 24 hours at some point during the study; (3) number and duration of quit attempts; (4) implementation of smoking restrictions at home; (5) increase in motivation to quit; (6) change in smoking-related cognitions	—

Measure

Time frame

Smoking-related variables: Assessment by standardized (online) questionnaires in a pre-post follow-up design (baseline, 3 and 12 months after the start of the intervention): (1) reduction in the number of cigarettes smoked per day; (2) occurrence of abstinence of at least 24 hours at some point during the study; (3) number and duration of quit attempts; (4) implementation of smoking restrictions at home; (5) increase in motivation to quit; (6) change in smoking-related cognitions

—

Countries

Germany

Contacts

Public ContactKirsten Lochbühler

IFT Institut für Therapieforschung

Studie-Tabakentwöhnung@ift.de08936080432

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Feb 14, 2026