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A Cluster-RCT of SHS Among Primary School Students (SHS-cRCT)

The University of Hong Kong (HKU) logo

The University of Hong Kong (HKU)

Status

Completed

Conditions

Secondhand Smoke
Thirdhand Smoke
Smoking

Treatments

Other: Online quizzes
Other: Leaflet
Other: Whatsapp messages
Other: Worksheets

Study type

Interventional

Funder types

Other

Identifiers

NCT03380234
coshshs

Details and patient eligibility

About

This is a school- and family-based prospective trial among Primary/Grade 2-4 (P2-4) students in randomly selected 12 schools in Hong Kong. This study will assess the intervention effects on children's exposure to environmental tobacco smoke (including SHS and THS at home, SHS at home from neighbours and SHS outside home), children's SHS-related knowledge and attitude, intention to smoke, respiratory symptoms, parents' smoking cessation, and family happiness.

Full description

Around 12 primary schools in Hong Kong will be randomly selected and recruited and the 3 grades (P2-4) in each of the recruited schools will be randomly allocated to intervention or control arms. After the consenting process and baseline survey, we will conduct a 3-month intervention and then 2-month boosters which include 8 worksheets, around 15 online question quizzes and 30 WhatsApp messages. After 3-month and 6-month follow-up periods, we will assess the differences of children's exposure to environmental tobacco smoke (including SHS and THS at home, SHS at home from neighbours and SHS outside home), children's SHS-related knowledge and attitude, intention to smoke, respiratory symptoms, parents' smoking cessation, and family happiness. According to the results of baseline survey, we will also invite all the students exposed to SHS at home to provide their hair samples before intervention and at the 6th month in order to obtain objective results (hair nicotine measurements).

Aims of this study: (1) To reduce children's exposure to environmental tobacco smoke. (2) To reduce objectively measured exposure to tobacco smoke (hair nicotine) among children who are exposed to SHS at home at baseline. (6-month, laboratory test). (3) To promote SHS-related knowledge and attitudes, and avoidance of SHS among children. (4) To reduce children's intention to smoke. (5) To reduce children's respiratory symptoms. (6) To promote smoking cessation (past 7 days) of parents. (child report) (7) To promote children's perception of family happiness.

Enrollment

3,432 patients

Sex

All

Volunteers

No Healthy Volunteers

Inclusion and exclusion criteria

We will invite all P2-4 students from 12 schools randomly selected from the 100 schools (which watched the performance by Hong Kong Council on Smoking and Health) to participate in this cluster RCT, as they are able to understand simple questionnaires and other self-help intervention materials, yet remain very receptive to intervention activities from our experience.

Inclusion criteria for hair nicotine test:

  1. exposed to secondhand smoke at home from smokers inside home in any of the past 7 days; 2) living with at least 1 smoker; 3) Never smoking or using e-cigarettes.

Trial design

Primary purpose

Prevention

Allocation

Randomized

Interventional model

Parallel Assignment

Masking

None (Open label)

3,432 participants in 2 patient groups

Intervention
Experimental group
Description:
8 worksheets and around 15 online quizzes and 30 WhatsApp messages.
Treatment:
Other: Online quizzes
Other: Worksheets
Other: Whatsapp messages
Control
Other group
Description:
Control students will receive the following minimal intervention to reduce their intention to smoke and SHS - a leaflet on smoking and SHS published by the Department of Health.
Treatment:
Other: Leaflet

Trial contacts and locations

1

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Data sourced from clinicaltrials.gov

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