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Increasing questionnaire response: evidence from a nested RCT within a longitudinal birth cohort study

BACKGROUND: High response rates are essential when questionnaires are used within research, as representativeness can affect the validity of studies and the ability to generalise the findings to a wider population. The study aimed to measure the response rate to questionnaires from a large longitudi...

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Autores principales: Goodwin, Michaela, Walsh, Tanya, Whittaker, William, Emsley, Richard, Sutton, Matt, Tickle, Martin, Kelly, Michael P., Pretty, Iain A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7309972/
https://www.ncbi.nlm.nih.gov/pubmed/32571269
http://dx.doi.org/10.1186/s12874-020-01034-7
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author Goodwin, Michaela
Walsh, Tanya
Whittaker, William
Emsley, Richard
Sutton, Matt
Tickle, Martin
Kelly, Michael P.
Pretty, Iain A.
author_facet Goodwin, Michaela
Walsh, Tanya
Whittaker, William
Emsley, Richard
Sutton, Matt
Tickle, Martin
Kelly, Michael P.
Pretty, Iain A.
author_sort Goodwin, Michaela
collection PubMed
description BACKGROUND: High response rates are essential when questionnaires are used within research, as representativeness can affect the validity of studies and the ability to generalise the findings to a wider population. The study aimed to measure the response rate to questionnaires from a large longitudinal epidemiological study and sought to determine if any changes made throughout data collection had a positive impact on the response to questionnaires and addressed any imbalance in response rates by participants’ levels of deprivation. METHODS: Data were taken from a prospective, comparative study, designed to examine the effects of the reintroduction of water fluoridation on children’s oral health over a five-year period. Response rates were analysed for the first year of data collection. During this year changes were made to the questionnaire layout and cover letter to attempt to increase response rates. Additionally a nested randomised control trial compared the effect on response rates of three different reminders to complete questionnaires. RESULTS: Data were available for 1824 individuals. Sending the complete questionnaire again to non-responders resulted in the highest level of response (25%). A telephone call to participants was the only method that appeared to address the imbalance in deprivation, with a mean difference in deprivation score of 2.65 (95% CI -15.50 to 10.20) between the responders and non-responders. CONCLUSIONS: Initially, low response rates were recorded within this large, longitudinal study giving rise to concerns about non-response bias. Resending the entire questionnaire again was the most effective way of reminding participants to complete the questionnaire. As this is a less labour intensive method than for example, calling participants, more time can then be spent targeting groups who are underrepresented. In order to address these biases, data can be weighted in order to draw conclusions about the population.
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spelling pubmed-73099722020-06-23 Increasing questionnaire response: evidence from a nested RCT within a longitudinal birth cohort study Goodwin, Michaela Walsh, Tanya Whittaker, William Emsley, Richard Sutton, Matt Tickle, Martin Kelly, Michael P. Pretty, Iain A. BMC Med Res Methodol Research Article BACKGROUND: High response rates are essential when questionnaires are used within research, as representativeness can affect the validity of studies and the ability to generalise the findings to a wider population. The study aimed to measure the response rate to questionnaires from a large longitudinal epidemiological study and sought to determine if any changes made throughout data collection had a positive impact on the response to questionnaires and addressed any imbalance in response rates by participants’ levels of deprivation. METHODS: Data were taken from a prospective, comparative study, designed to examine the effects of the reintroduction of water fluoridation on children’s oral health over a five-year period. Response rates were analysed for the first year of data collection. During this year changes were made to the questionnaire layout and cover letter to attempt to increase response rates. Additionally a nested randomised control trial compared the effect on response rates of three different reminders to complete questionnaires. RESULTS: Data were available for 1824 individuals. Sending the complete questionnaire again to non-responders resulted in the highest level of response (25%). A telephone call to participants was the only method that appeared to address the imbalance in deprivation, with a mean difference in deprivation score of 2.65 (95% CI -15.50 to 10.20) between the responders and non-responders. CONCLUSIONS: Initially, low response rates were recorded within this large, longitudinal study giving rise to concerns about non-response bias. Resending the entire questionnaire again was the most effective way of reminding participants to complete the questionnaire. As this is a less labour intensive method than for example, calling participants, more time can then be spent targeting groups who are underrepresented. In order to address these biases, data can be weighted in order to draw conclusions about the population. BioMed Central 2020-06-22 /pmc/articles/PMC7309972/ /pubmed/32571269 http://dx.doi.org/10.1186/s12874-020-01034-7 Text en © The Author(s) 2020 Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.
spellingShingle Research Article
Goodwin, Michaela
Walsh, Tanya
Whittaker, William
Emsley, Richard
Sutton, Matt
Tickle, Martin
Kelly, Michael P.
Pretty, Iain A.
Increasing questionnaire response: evidence from a nested RCT within a longitudinal birth cohort study
title Increasing questionnaire response: evidence from a nested RCT within a longitudinal birth cohort study
title_full Increasing questionnaire response: evidence from a nested RCT within a longitudinal birth cohort study
title_fullStr Increasing questionnaire response: evidence from a nested RCT within a longitudinal birth cohort study
title_full_unstemmed Increasing questionnaire response: evidence from a nested RCT within a longitudinal birth cohort study
title_short Increasing questionnaire response: evidence from a nested RCT within a longitudinal birth cohort study
title_sort increasing questionnaire response: evidence from a nested rct within a longitudinal birth cohort study
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7309972/
https://www.ncbi.nlm.nih.gov/pubmed/32571269
http://dx.doi.org/10.1186/s12874-020-01034-7
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