Effects of an increased financial incentive on follow-up in an online, automated smoking cessation trial: A randomised controlled Study Within a Trial (SWAT).
Nicotine Tob Res
; 2024 Mar 21.
Article
em En
| MEDLINE
| ID: mdl-38513087
ABSTRACT
INTRODUCTION:
Poor retention in clinical trials can impact on statistical power, reliability, validity and generalisability of findings and is a particular challenge in smoking cessation studies. In online trials with automated follow up mechanisms, poor response also increases resource-need for manual follow up. This study compared two financial incentives on response rates at 6 months follow up, in an online, automated smoking cessation feasibility trial of a cessation smartphone app (Quit Sense).METHODS:
A study within a trial (SWAT), embedded within a host randomised controlled trial. Host trial participants were randomised 11 to receive either a £10 or £20 voucher incentive, for completing the 6-month questionnaire. Stratification for randomisation to the SWAT was by minimisation to ensure an even split of host trial arm participants, and by 6-week response rate. Outcome measures were questionnaire completion rate, time to completion, number of completers requiring manual follow up and completeness of responses.RESULTS:
204 participants were randomised to the SWAT. The £20 and £10 incentives did not differ in completion rate at 6 months (79% versus 74%; p=0.362) but did reduce the proportion of participants requiring manual follow up (46% versus 62%; p=0.018) and the median completion time (7 days versus 15 days; p=0.008). Measure response completeness rates were higher among £20 incentive participants, though differences were small for the host trial's primary smoking outcome.CONCLUSIONS:
Benefits to using relatively modest increases in incentive for online smoking cessation trials include more rapid completion of follow up questionnaires and reduced manual follow up. IMPLICATIONS A modest increase in incentive (from £10 to £20) to promote the completion of follow up questionnaires in online smoking cessation trials may not increase overall response rates but could lead to more rapid data collection, a reduced need for manual follow-up and reduced missing data among those who initiate completing a questionnaire. Such an improvement may help to reduce bias, increase validity and generalisability, and improve statistical power in smoking cessation trials.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Contexto em Saúde:
1_ASSA2030
/
2_ODS3
Problema de saúde:
1_doencas_nao_transmissiveis
/
1_financiamento_saude
/
2_muertes_prematuras_enfermedades_notrasmisibles
Idioma:
En
Revista:
Nicotine Tob Res
Assunto da revista:
SAUDE PUBLICA
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
Reino Unido