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The women made it work: fuzzy transitive closure of the results chain in a dengue prevention trial in Mexico

BACKGROUND: A modified theory of planned behaviour (acronym CASCADA) proposes that Conscious knowledge precedes a change in Attitude, which in turn precedes positive deviations from negative Subjective norms, intention to Change, perception of Agency to change, Discussion of possible action, and Act...

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Autores principales: Andersson, Neil, Beauchamp, Mario, Nava-Aguilera, Elizabeth, Paredes-Solís, Sergio, Šajna, Mateja
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5506572/
https://www.ncbi.nlm.nih.gov/pubmed/28699563
http://dx.doi.org/10.1186/s12889-017-4301-0
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author Andersson, Neil
Beauchamp, Mario
Nava-Aguilera, Elizabeth
Paredes-Solís, Sergio
Šajna, Mateja
author_facet Andersson, Neil
Beauchamp, Mario
Nava-Aguilera, Elizabeth
Paredes-Solís, Sergio
Šajna, Mateja
author_sort Andersson, Neil
collection PubMed
description BACKGROUND: A modified theory of planned behaviour (acronym CASCADA) proposes that Conscious knowledge precedes a change in Attitude, which in turn precedes positive deviations from negative Subjective norms, intention to Change, perception of Agency to change, Discussion of possible action, and Action itself. We used this as a results chain to investigate gender-specific behaviour dynamics in chemical-free dengue prevention. METHODS: Secondary analysis of the Mexican arm of a cluster randomised controlled trial used household survey data on intermediate outcomes of dengue prevention behaviour. We used a matrix of odds ratios between outcomes, transformed to a symmetrical range (−1, 1), to compute fuzzy transitive closure of the results chain for control and intervention clusters, then for male and female respondents separately in each group. Transitive closure of a map computes the influence of each factor on each other factor, taking account of all influences in the system. Cumulative net influence was the sum of influences across the results chain. RESULTS: Responses of 5042 women and 1143 men in 45 intervention clusters contrasted with those of 5025 women and 1179 men in 45 control clusters. Control clusters showed a distal block (negative influence) in the results chain with a cumulative net influence of 0.88; intervention clusters showed no such block and a cumulative net influence of 1.92. Female control respondents, like the overall control picture, showed a distal block, whereas female intervention responses showed no such blocks (cumulative net influence 0.78 and 1.73 respectively). Male control respondents showed weak distal blocks. Male intervention responses showed several new negative influences and a reduction of cumulative net influence (1.38 in control and 1.11 in intervention clusters). CONCLUSIONS: The overall influence of the intervention across the results chain fits with the trial findings, but is different for women and men. Among women, the intervention overcame blocks and increased the cumulative net influence of knowledge on action. Among men, the intervention did not reinforce prevention behaviour. This might be related to emphasis, during the intervention, on women’s participation and empowerment. The fuzzy transitive closure of the CASCADA map usefully highlights the differences between gender-specific results chains. TRIAL REGISTRATION: ISRCTN27581154.
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spelling pubmed-55065722017-07-12 The women made it work: fuzzy transitive closure of the results chain in a dengue prevention trial in Mexico Andersson, Neil Beauchamp, Mario Nava-Aguilera, Elizabeth Paredes-Solís, Sergio Šajna, Mateja BMC Public Health Research BACKGROUND: A modified theory of planned behaviour (acronym CASCADA) proposes that Conscious knowledge precedes a change in Attitude, which in turn precedes positive deviations from negative Subjective norms, intention to Change, perception of Agency to change, Discussion of possible action, and Action itself. We used this as a results chain to investigate gender-specific behaviour dynamics in chemical-free dengue prevention. METHODS: Secondary analysis of the Mexican arm of a cluster randomised controlled trial used household survey data on intermediate outcomes of dengue prevention behaviour. We used a matrix of odds ratios between outcomes, transformed to a symmetrical range (−1, 1), to compute fuzzy transitive closure of the results chain for control and intervention clusters, then for male and female respondents separately in each group. Transitive closure of a map computes the influence of each factor on each other factor, taking account of all influences in the system. Cumulative net influence was the sum of influences across the results chain. RESULTS: Responses of 5042 women and 1143 men in 45 intervention clusters contrasted with those of 5025 women and 1179 men in 45 control clusters. Control clusters showed a distal block (negative influence) in the results chain with a cumulative net influence of 0.88; intervention clusters showed no such block and a cumulative net influence of 1.92. Female control respondents, like the overall control picture, showed a distal block, whereas female intervention responses showed no such blocks (cumulative net influence 0.78 and 1.73 respectively). Male control respondents showed weak distal blocks. Male intervention responses showed several new negative influences and a reduction of cumulative net influence (1.38 in control and 1.11 in intervention clusters). CONCLUSIONS: The overall influence of the intervention across the results chain fits with the trial findings, but is different for women and men. Among women, the intervention overcame blocks and increased the cumulative net influence of knowledge on action. Among men, the intervention did not reinforce prevention behaviour. This might be related to emphasis, during the intervention, on women’s participation and empowerment. The fuzzy transitive closure of the CASCADA map usefully highlights the differences between gender-specific results chains. TRIAL REGISTRATION: ISRCTN27581154. BioMed Central 2017-05-30 /pmc/articles/PMC5506572/ /pubmed/28699563 http://dx.doi.org/10.1186/s12889-017-4301-0 Text en © The Author(s). 2017 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. 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.
spellingShingle Research
Andersson, Neil
Beauchamp, Mario
Nava-Aguilera, Elizabeth
Paredes-Solís, Sergio
Šajna, Mateja
The women made it work: fuzzy transitive closure of the results chain in a dengue prevention trial in Mexico
title The women made it work: fuzzy transitive closure of the results chain in a dengue prevention trial in Mexico
title_full The women made it work: fuzzy transitive closure of the results chain in a dengue prevention trial in Mexico
title_fullStr The women made it work: fuzzy transitive closure of the results chain in a dengue prevention trial in Mexico
title_full_unstemmed The women made it work: fuzzy transitive closure of the results chain in a dengue prevention trial in Mexico
title_short The women made it work: fuzzy transitive closure of the results chain in a dengue prevention trial in Mexico
title_sort women made it work: fuzzy transitive closure of the results chain in a dengue prevention trial in mexico
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5506572/
https://www.ncbi.nlm.nih.gov/pubmed/28699563
http://dx.doi.org/10.1186/s12889-017-4301-0
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