Effectiveness of Different Incentive Models in Booster up the Second Follow up Response Rate

NCT ID: NCT03297866

Last Updated: 2018-05-22

Basic Information

• Recruitment Status: COMPLETED
• Total Enrollment: 1246 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2017-07-14
• Study Completion Date: 2018-04-30

Brief Summary

Aim to test the effectiveness of different incentive models for increasing the follow-up response rate in the current smoker subject.

Detailed Description

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.

Conditions

To Test the Effectiveness of Different Incentive Models for Increasing the Follow-up Response Rate in the Current Smoker Subject

Study Design

• Observational Model Type: COHORT
• Study Time Perspective: CROSS_SECTIONAL

Study Groups

Incentive schemes 1

No incentive will be given after completing the follow-up survey

No interventions assigned to this group

Incentive schemes 2

Receiving $100 supermarket coupon after completing the follow-up survey

No interventions assigned to this group

Incentive schemes 3

Receiving $200 supermarket coupon after completing the follow-up survey

No interventions assigned to this group

Incentive schemes 4

Receiving $100 supermarket coupon before completing the follow-up survey and another $100 supermarket coupon after completing the follow-up survey

No interventions assigned to this group

Eligibility Criteria

Inclusion Criteria

• Aged 15 or above
• Cantonese or Mandarin speakers

Exclusion Criteria

• Unable to provide a consent form
• Speak language other than Cantonese and Mandarin

• Minimum Eligible Age: 15 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

The University of Hong Kong

OTHER

Sponsor Role: lead

Responsible Party

Dr. Wang Man-Ping

Assistant Professor

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Man Ping Wang, PhD

Role: PRINCIPAL_INVESTIGATOR

Study Principal Investigator

Locations

Public Opinion Programme, the University of Hong Kong

Hong Kong, , Hong Kong

Countries

Hong Kong

References

Cheung YTD, Weng X, Wang MP, Ho SY, Kwong ACS, Lai VWY, Lam TH. Effect of prepaid and promised financial incentive on follow-up survey response in cigarette smokers: a randomized controlled trial. BMC Med Res Methodol. 2019 Jul 4;19(1):138. doi: 10.1186/s12874-019-0786-9.

Reference Type: DERIVED

PMID: 31272393 (View on PubMed)

Other Identifiers

Incentive schemes 2017

Identifier Type: -

Identifier Source: org_study_id