Efficacy of Brief MI Delivered Via Mobile Instant Messaging to Help Unmotivated Smokers With Chronic Diseases to Quit

NCT04890223 | Completed DMC

• 1 other identifier: NTWCREC19001_R1
• Study Type: interventional
• Target: 728
• Locations: 1 country
• Sites: 1

Brief Summary

This study aims to examine the efficacy of brief MI delivered by mobile instant messaging tools in promoting smoking cessation among unmotivated smokers with chronic diseases. Participants in the intervention group will receive a brief MI intervention while the control group will receive a placebo intervention.

Conditions

Smoking Cessation

Outcome Measures

Primary Outcomes (1)

• Biochemically validated smoking abstinence at 12 months

  The participants who self-reported not smoking within the past seven days will be invited to submit to a biochemical verification test of smoking abstinence, including an exhaled CO test and a salivary cotinine test. Smoking abstinence is defined as an exhaled CO level of less than 4 ppm and a saliva cotinine level lower than 15 ng/ml.

  12-month follow-up

Secondary Outcomes (6)

• Biochemically validated smoking abstinence at 6 months

  6-month follow-up

• Self-reported smoking abstinence

  3-, 6-, or 12-month follow-ups

• Intention to quit

  3-, 6-, or 12-month follow-ups

• Self-reported smoking reduction of at least 50%

  3-, 6-, or 12-month follow-ups

• Quit attempts

  3-, 6-, or 12-month follow-ups

Study Arms (2)

Intervention group

EXPERIMENTAL

The participants in the intervention group will be asked to identify an unfavourable behaviour that they wish to change when filling out the baseline questionnaire. The research nurse will conduct the individual face-to-face brief MI interviews for this purpose, which will last for approximately five to ten minutes. After the face-to-face brief MI interviews, the participants in the intervention group will receive brief MI messages individually by means of mobile instant messaging for six months from the baseline. After six months, the brief MI messages will cease to be delivered to the participants in the intervention group, with whom the research team will then maintain only minimal contact until the 12-month follow-up.

Behavioral: Brief MI intervention

Control group

PLACEBO COMPARATOR

Participants in the control group will be asked to identify an unfavourable behaviour that they want to change at the baseline but, rather than brief MI interviews delivered face-to-face, received generic health advice consultations on the selected unfavourable behaviour that lasted approximately five to ten minutes. Each participant will receive a self-help smoking cessation booklet titled Be Smart, Quit Smoking! published by the Hong Kong Council on Smoking and Health with information about the negative health consequences of smoking, reasons to quit, strategies for quitting, and smoking cessation services available in Hong Kong along with a public quitline number (specifically, 1833183). Those who express the intention to quit at follow-ups will receive usual smoking cessation support.

Behavioral: Placebo intervention

Interventions

Brief MI intervention BEHAVIORAL

Brief MI intervention

Intervention group

Placebo intervention BEHAVIORAL

Generic health advice consultations and self-help smoking cessation booklets

Control group

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Hong Kong Chinese over the age of 17
• Had smoked at least one cigarette per day over the previous three months
• Had been diagnosed with at least one chronic disease
• Able to speak Cantonese and read Chinese
• Willing to take action to improve their health but had no intention to quit smoking
• Had a smartphone and were able to use mobile instant messaging tools
• Willing to receive health promotion advice and communicate through mobile instant messaging

You may not qualify if:

• Participating in other smoking cessation programs or services
• With mental or cognitive impairment or communication problems

Sponsors & Collaborators

• The University of Hong Kong: lead

Study Sites (1)

University of Hong Kong

Hong Kong, Hong Kong

Location

MeSH Terms

Conditions

Smoking Cessation

Condition Hierarchy (Ancestors)

Health Behavior; Behavior

Study Officials

• Ho Cheung William Li, PhD

  Chinese University of Hong Kong

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: OUTCOMES ASSESSOR
• Purpose: SUPPORTIVE CARE
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: May 12, 2021
• First Posted: May 18, 2021
• Study Start: June 1, 2021
• Primary Completion: February 17, 2023
• Study Completion: February 17, 2023
• Last Updated: August 7, 2023

Record last verified: 2023-08

Data Sharing

• IPD Sharing: Will not share

Locations

HK (1)