A Cluster-RCT of SHS Among Primary School Students

Smoking Clinical Trial

— SHS-cRCT  

Official title:

Reducing Exposure to Tobacco Smoke Among Primary School Students - a Cluster Randomised Controlled Trial

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT03380234
• Other study ID #: coshshs
• Status: Completed
• Phase: N/A
• Start date: September 20, 2018
• Est. completion date: November 30, 2019

Study information

• Verified date: February 2020
• Source: The University of Hong Kong
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

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.

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.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 3432
• Est. completion date: November 30, 2019
• Est. primary completion date: November 30, 2019
• Accepts healthy volunteers: No
• Gender: All
• Age group: N/A and older

Eligibility

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.

Related Conditions & MeSH terms

• Secondhand Smoke
• Smoking
• Thirdhand Smoke

Intervention

Other:
• Worksheets
Worksheets will be distributed to students for them and their parents to complete together. During the first 3 months, the teachers will distribute 1 worksheet every two weeks to the intervention grades, and 1 worksheet in the 4th and 5th months as boosters. The worksheets will deliver information about tobacco smoke, SHS and THS, inviting students and their family members to complete other interesting tasks together.
• Whatsapp messages
A mobile phone number of this study is also provided on the worksheets, through which participants can receive WhatsApp/WeChat/instant messages (1-2 times every week) designed to encourage behavioural change [15]. They can then forward selected messages to other members of their household, especially smokers.
• Online quizzes
At the end of each worksheet, a QR code is inserted. By scanning this code, students or parents will be invited to answer 2-3 simple quizzes which allow us to assess students' knowledge obtained from the intervention materials and their avoidance of environmental tobacco smoke.
• Leaflet
A leaflet on smoking and SHS published by the Department of Health will be mailed to the control grades.

Locations

Country	Name	City	State
Hong Kong	Local primary schools	Hong Kong

Sponsors (2)

Lead Sponsor	Collaborator
The University of Hong Kong	Hong Kong Council on Smoking and Health

Country where clinical trial is conducted

Hong Kong, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	To reduce children's exposure to environmental tobacco smoke.	In the 3th and 6th month, students will conduct a survey to assess their exposure to environmental tobacco smoke.	3 and 6-month
Secondary	To reduce the hair nicotine levels of students who are exposed to SHS at home at baseline.	At the 6th months, parents will be invited to post their children's hair for laboratory test and identify the change of the nicotine levels (objective measurement) before and after intervention.	6-month
Secondary	To promote SHS-related knowledge and attitudes, and avoidance of SHS among children.	In the 3th and 6th month, students will conduct a survey to assess their SHS-related knowledge and attitudes, and avoidance of SHS.	3 and 6-month
Secondary	To reduce children's intention to smoke.	In the 3th and 6th month, students will conduct a survey to assess children's intention to smoke.	3 and 6-month
Secondary	To reduce children's respiratory symptoms.	In the 3th and 6th month, students will conduct a survey to assess children's respiratory symptoms.	3 and 6-month
Secondary	To promote smoking cessation (past 7 days) of parents. (child report)	In the 3th and 6th month, students will conduct a survey to report their parents' smoking cessation.	6-month and 12-month3 and 6-month
Secondary	To promote children's perception of family happiness.	In the 3th and 6th month, students will conduct a survey to report their perception of family happiness.	3 and 6-month