<clinical_study>
  <!-- This xml conforms to an XML Schema at:
    https://clinicaltrials.gov/ct2/html/images/info/public.xsd -->
  <required_header>
    <download_date>ClinicalTrials.gov processed this data on September 20, 2023</download_date>
    <link_text>Link to the current ClinicalTrials.gov record.</link_text>
    <url>https://clinicaltrials.gov/ct2/show/NCT03297866</url>
  </required_header>
  <id_info>
    <org_study_id>Incentive schemes 2017</org_study_id>
    <nct_id>NCT03297866</nct_id>
  </id_info>
  <brief_title>Effectiveness of Different Incentive Models in Booster up the Second Follow up Response Rate</brief_title>
  <official_title>Effectiveness of Different Incentive Models in Booster up the Second Follow up Response Rate</official_title>
  <sponsors>
    <lead_sponsor>
      <agency>The University of Hong Kong</agency>
      <agency_class>Other</agency_class>
    </lead_sponsor>
  </sponsors>
  <source>The University of Hong Kong</source>
  <oversight_info>
    <has_dmc>No</has_dmc>
    <is_fda_regulated_drug>No</is_fda_regulated_drug>
    <is_fda_regulated_device>No</is_fda_regulated_device>
  </oversight_info>
  <brief_summary>
    <textblock>
      Aim to test the effectiveness of different incentive models for increasing the follow-up&#xD;
      response rate in the current smoker subject.&#xD;
    </textblock>
  </brief_summary>
  <detailed_description>
    <textblock>
      According to the Hong Kong Census and Statistic Department, 10.5% of the Hong Kong population&#xD;
      who aged 15 years or above are daily smokers (Thematic Household Survey Report - Report No.&#xD;
      59, 2016). The smoking prevalence was estimated from a thematic household survey that has&#xD;
      been conducted every 2 or 3 years. Another population-based survey related to tobacco control&#xD;
      is the Tobacco Control Policy-related Survey conducted by the Hong Kong Council on Smoking&#xD;
      and Health and the University of Hong Kong. Both surveys were in a cross-sectional design and&#xD;
      no follow-up was done. A cohort study with follow-up data could provide more insights for the&#xD;
      causal relationship. However, most people are not willing to complete follow-up survey and&#xD;
      the response rate is often low (Mellahi, 2016). The low survey response rate could lead to&#xD;
      statistically bias in the research funding (Pit, 2014). Therefore, cohort surveys need to&#xD;
      provide attractive monetary incentive to the interviewee to increase the response rate (Pit,&#xD;
      2014).&#xD;
&#xD;
      This study aims to assess and compare the 3-month response rate of a follow-up survey due to&#xD;
      different financial incentive schemes. The findings will be used for a feasibility assessment&#xD;
      of future cohort studies of evaluating tobacco control measures and public opinion, and&#xD;
      exploration of appropriate incentive scheme.&#xD;
    </textblock>
  </detailed_description>
  <overall_status>Completed</overall_status>
  <start_date type="Actual">July 14, 2017</start_date>
  <completion_date type="Actual">April 30, 2018</completion_date>
  <primary_completion_date type="Actual">January 31, 2018</primary_completion_date>
  <study_type>Observational</study_type>
  <has_expanded_access>No</has_expanded_access>
  <study_design_info>
    <observational_model>Cohort</observational_model>
    <time_perspective>Cross-Sectional</time_perspective>
  </study_design_info>
  <primary_outcome>
    <measure>Proportion of respondents who will complete the 3-month follow-up</measure>
    <time_frame>Finish all telephone survey by Jan 2018</time_frame>
    <description>Proportion of respondents who will complete the 3-month follow-up</description>
  </primary_outcome>
  <number_of_groups>4</number_of_groups>
  <enrollment type="Actual">1246</enrollment>
  <condition>To Test the Effectiveness of Different Incentive Models for Increasing the Follow-up Response Rate in the Current Smoker Subject</condition>
  <arm_group>
    <arm_group_label>Incentive schemes 1</arm_group_label>
    <description>No incentive will be given after completing the follow-up survey</description>
  </arm_group>
  <arm_group>
    <arm_group_label>Incentive schemes 2</arm_group_label>
    <description>Receiving $100 supermarket coupon after completing the follow-up survey</description>
  </arm_group>
  <arm_group>
    <arm_group_label>Incentive schemes 3</arm_group_label>
    <description>Receiving $200 supermarket coupon after completing the follow-up survey</description>
  </arm_group>
  <arm_group>
    <arm_group_label>Incentive schemes 4</arm_group_label>
    <description>Receiving $100 supermarket coupon before completing the follow-up survey and another $100 supermarket coupon after completing the follow-up survey</description>
  </arm_group>
  <eligibility>
    <study_pop>
      <textblock>
        All Hong Kong residents&#xD;
      </textblock>
    </study_pop>
    <sampling_method>Probability Sample</sampling_method>
    <criteria>
      <textblock>
        Inclusion Criteria:&#xD;
&#xD;
          -  Aged 15 or above&#xD;
&#xD;
          -  Cantonese or Mandarin speakers&#xD;
&#xD;
        Exclusion Criteria:&#xD;
&#xD;
          -  Unable to provide a consent form&#xD;
&#xD;
          -  Speak language other than Cantonese and Mandarin&#xD;
      </textblock>
    </criteria>
    <gender>All</gender>
    <minimum_age>15 Years</minimum_age>
    <maximum_age>N/A</maximum_age>
    <healthy_volunteers>No</healthy_volunteers>
  </eligibility>
  <overall_official>
    <last_name>Man Ping Wang, PhD</last_name>
    <role>Principal Investigator</role>
    <affiliation>Study Principal Investigator</affiliation>
  </overall_official>
  <location>
    <facility>
      <name>Public Opinion Programme, the University of Hong Kong</name>
      <address>
        <city>Hong Kong</city>
        <country>Hong Kong</country>
      </address>
    </facility>
  </location>
  <location_countries>
    <country>Hong Kong</country>
  </location_countries>
  <verification_date>May 2018</verification_date>
  <study_first_submitted>September 26, 2017</study_first_submitted>
  <study_first_submitted_qc>September 26, 2017</study_first_submitted_qc>
  <study_first_posted type="Actual">September 29, 2017</study_first_posted>
  <last_update_submitted>May 21, 2018</last_update_submitted>
  <last_update_submitted_qc>May 21, 2018</last_update_submitted_qc>
  <last_update_posted type="Actual">May 22, 2018</last_update_posted>
  <responsible_party>
    <responsible_party_type>Principal Investigator</responsible_party_type>
    <investigator_affiliation>The University of Hong Kong</investigator_affiliation>
    <investigator_full_name>Dr. Wang Man-Ping</investigator_full_name>
    <investigator_title>Assistant Professor</investigator_title>
  </responsible_party>
  <!-- Results have not yet been posted for this study                                          -->
</clinical_study>


download date: ClinicalTrials.gov processed this data on September 20, 2023
link text: Link to the current ClinicalTrials.gov record.
url: https://clinicaltrials.gov/ct2/show/NCT03297866
org study id: Incentive schemes 2017
nct id: NCT03297866
lead sponsor: 
has dmc: No
is fda regulated drug: No
is fda regulated device: No
Aim to test the effectiveness of different incentive models for increasing the follow-up
      response rate in the current smoker subject.
According to the Hong Kong Census and Statistic Department, 10.5% of the Hong Kong population
      who aged 15 years or above are daily smokers (Thematic Household Survey Report - Report No.
      59, 2016). The smoking prevalence was estimated from a thematic household survey that has
      been conducted every 2 or 3 years. Another population-based survey related to tobacco control
      is the Tobacco Control Policy-related Survey conducted by the Hong Kong Council on Smoking
      and Health and the University of Hong Kong. Both surveys were in a cross-sectional design and
      no follow-up was done. A cohort study with follow-up data could provide more insights for the
      causal relationship. However, most people are not willing to complete follow-up survey and
      the response rate is often low (Mellahi, 2016). The low survey response rate could lead to
      statistically bias in the research funding (Pit, 2014). Therefore, cohort surveys need to
      provide attractive monetary incentive to the interviewee to increase the response rate (Pit,
      2014).

      This study aims to assess and compare the 3-month response rate of a follow-up survey due to
      different financial incentive schemes. The findings will be used for a feasibility assessment
      of future cohort studies of evaluating tobacco control measures and public opinion, and
      exploration of appropriate incentive scheme.
observational model: Cohort
time perspective: Cross-Sectional
measure: Proportion of respondents who will complete the 3-month follow-up
time frame: Finish all telephone survey by Jan 2018
description: Proportion of respondents who will complete the 3-month follow-up
arm group label: Incentive schemes 1
description: No incentive will be given after completing the follow-up survey
arm group label: Incentive schemes 2
description: Receiving $100 supermarket coupon after completing the follow-up survey
arm group label: Incentive schemes 3
description: Receiving $200 supermarket coupon after completing the follow-up survey
arm group label: Incentive schemes 4
description: Receiving $100 supermarket coupon before completing the follow-up survey and another $100 supermarket coupon after completing the follow-up survey
study pop: 
sampling method: Probability Sample
criteria: 
gender: All
minimum age: 15 Years
maximum age: N/A
healthy volunteers: No
last name: Man Ping Wang, PhD
role: Principal Investigator
affiliation: Study Principal Investigator
facility: 
country: Hong Kong
responsible party type: Principal Investigator
investigator affiliation: The University of Hong Kong
investigator full name: Dr. Wang Man-Ping
investigator title: Assistant Professor