NCT03264144

Brief Summary

This study will examine the effectiveness of a social norms campaign in correcting smoking misperceptions, reducing smoking susceptibility and changing smoking-related behaviours in Hong Kong adolescents.

Trial Health

43
At Risk

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Trial has exceeded expected completion date
Enrollment
12,868

participants targeted

Target at P75+ for not_applicable

Timeline
Completed

Started Oct 2017

Shorter than P25 for not_applicable

Geographic Reach
1 country

1 active site

Status
unknown

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

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Study Timeline

Key milestones and dates

First Submitted

Initial submission to the registry

August 24, 2017

Completed
4 days until next milestone

First Posted

Study publicly available on registry

August 28, 2017

Completed
2 months until next milestone

Study Start

First participant enrolled

October 13, 2017

Completed
9 months until next milestone

Primary Completion

Last participant's last visit for primary outcome

July 1, 2018

Completed
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

July 1, 2018

Completed
Last Updated

May 3, 2018

Status Verified

May 1, 2018

Enrollment Period

9 months

First QC Date

August 24, 2017

Last Update Submit

May 1, 2018

Conditions

Tobacco Use

Keywords

Social normsAdolescentSmokingRandomised controlled trial

Outcome Measures

Primary Outcomes (2)

  • Perceived adolescent smoking prevalence

    Perceived prevalence of current smoking secondary school students in Hong Kong

    At the time of survey

  • Smoking susceptibility

    Intention to smoke in the next 12 months, if good friends are smoking in front, and if a good friend offered a cigarette

    At the time of survey

Secondary Outcomes (3)

  • Smoking intensity

    Past 30 days

  • Intention to quit

    At the time of survey

  • Quit attempts

    Past 3 months

Study Arms (2)

Intervention

EXPERIMENTAL

Students in the schools assigned to the intervention group will receive the intervention after the baseline survey. The intervention will be a social norms campaign involving posters, table tents, flyers and an online banner.

Behavioral: Social norms campaign

Control

NO INTERVENTION

Students in the schools assigned to the control group will not receive anything during the randomised controlled trial. They will receive the intervention materials after the trial.

Interventions

Social norms campaignBEHAVIORAL

Intervention messages will mainly highlight the prevalence of Hong Kong adolescents who do not smoke cigarettes and have no intention to smoke cigarettes. The messages will be conveyed to students through posters, table tents, flyers and an online banner. Posters will be posted at prominent places in schools, table tents will be placed in school canteens, flyers will be distributed to students, and the online banner will be placed at the school website. The intervention will last for 2 months.

Intervention

Eligibility Criteria

Age11 Years - 20 Years
Sexall
Healthy VolunteersYes
Age GroupsChild (0-17), Adult (18-64)

You may qualify if:

  • Local secondary schools that cover grades 1-6

You may not qualify if:

  • International secondary schools
  • Special schools for adolescents with visual, hearing or other physical impairments or disabilities

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Local secondary schools

Hong Kong, Hong Kong

Location

MeSH Terms

Conditions

Tobacco UseSmoking

Condition Hierarchy (Ancestors)

Behavior

Study Officials

  • Sai Yin Ho, Dr

    The University of Hong Kong

    PRINCIPAL INVESTIGATOR

Study Design

Study Type
interventional
Phase
not applicable
Allocation
RANDOMIZED
Masking
NONE
Purpose
PREVENTION
Intervention Model
PARALLEL
Sponsor Type
OTHER
Responsible Party
PRINCIPAL INVESTIGATOR
PI Title
Associate Professor

Study Record Dates

First Submitted

August 24, 2017

First Posted

August 28, 2017

Study Start

October 13, 2017

Primary Completion

July 1, 2018

Study Completion

July 1, 2018

Last Updated

May 3, 2018

Record last verified: 2018-05

Data Sharing

IPD Sharing
Will not share

Locations

HK(1)