Clinical Trial Details
— Status: Active, not recruiting
Administrative data
NCT number |
NCT04772521 |
Other study ID # |
LST SCPW P5 |
Secondary ID |
|
Status |
Active, not recruiting |
Phase |
N/A
|
First received |
|
Last updated |
|
Start date |
April 15, 2021 |
Est. completion date |
December 30, 2023 |
Study information
Verified date |
December 2023 |
Source |
The University of Hong Kong |
Contact |
n/a |
Is FDA regulated |
No |
Health authority |
|
Study type |
Interventional
|
Clinical Trial Summary
Smoking causes cardiovascular and respiratory diseases, cancers and diabetes, and it has been
a leading risk factor for death globally. Despite the availability of smoking cessation
services locally, most smokers do not use such services. Workplace is one of the most
convenient platforms to provide smoking cessation services and over 55% of smokers are
employed according to the local population-based survey. Moreover, The COVID-19 pandemic and
new normal increase in mental health burden to people in the workplace. An online survey
during the pandemic found 88% of Hong Kong employees suffered from stress at work during the
past 7 days. Mental health can be both precursors and consequences of smoking. However, the
effectiveness of a smoking cessation programme conducted in workplace is yet to be examined
in Hong Kong, and the mental health support for smoking employees in promoting smoking
cessation is not clear. Thus, this study aims to test, by a 2-arm RCT, the effectiveness of
an intervention of which includes mobile phone-based intervention on reducing mental health
symptoms and smoking cessation in workplaces in Hong Kong; identify facilitators and barriers
of successful policy implementation and quitting; examine and evaluate the company
environment and their policies in promoting smoking cessation.
Description:
This study will separate into two phases. Phase I is a large scale cross-sectional survey of
corporations in Hong Kong to examine the employers' knowledge, attitudes and practices in
promoting SC in the workplace. Phase II is a 2-arm randomized controlled trial that will be
conducted to examine the effectiveness of mobile phone-based intervention combined with
company health talk, brief phone counselling and nicotine replacement therapy sampling, for
SC in workplaces.
Data analyses
Phase I:
Descriptive statistics will be used to analyze the (1) profile of the corporations, including
the total number of employees and smoking employees; (2) employers/managerial staff's
knowledge on smoking; (3) employers/managerial staff's attitudes on smoking cessation; (4)
practices of the companies with respect to smoking cessation.
Phase II:
Primary outcome is self-reported abstinence in the past 7 days at 6-month follow-up.
Secondary outcomes for smoking cessation include self-reported abstinence in the past 7 days
at 9- and 12-month follow-ups, the biochemically validated abstinence (defined as exhaled CO
level <4ppm and saliva cotinine level ≤30 ng/ml); smoking reduction (50% or above reduction
in cigarette consumption compared with baseline. Secondary outcomes for mental health include
stress (Perceived Stress Scale-10), depression (Personal Health Questionnaire for
Depression), anxiety (Generalized Anxiety Disorder scale) and self-rated health.
Descriptive statistics such as frequency, percentage, and mean will be used to summarize the
outcomes and other variables. Chi-square tests and t-tests will be used to compare outcome
variables between subgroups. The intention-to-treat (ITT) analysis will be used such that
those lost to contact and refused cases at the follow-ups will be treated as no reduction in
cigarette consumption nor quitting. Multiple imputations will be used to compute missing data
for outcome variables. The association between intervention adherence (e.g., engagement in
the IM interaction) and the primary outcome within the participants in the intervention group
will be examined. The intervention effect by subgroups will be assessed respectively,
including sex, age, education level, company types, previous quit attempts, cigarette
dependence, and intention to quit, although the statistical power would be lower due to
smaller numbers.