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Individual differences in adaptability to shiftwork : an exploration of models of shiftwork tolerance / JOANNE HILL

Swansea University Author: JOANNE HILL

DOI (Published version): 10.23889/SUthesis.60187

Abstract

In order to refine models of shiftwork tolerance, the purported relationships between outcomes and modifiers of the adaptation process were explored. A series of empirical studies amongst shiftworkers, across a variety of work patterns and industries, examined the efficacy of demographic, circadian,...

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Published: Swansea 2002
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
URI: https://cronfa.swan.ac.uk/Record/cronfa60187
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last_indexed 2022-06-14T03:18:49Z
id cronfa60187
recordtype RisThesis
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spelling 2022-06-13T12:28:03.3565726 v2 60187 2022-06-13 Individual differences in adaptability to shiftwork : an exploration of models of shiftwork tolerance 1f44b8afc07120d2c7b9f1462389e639 JOANNE HILL JOANNE HILL true false 2022-06-13 In order to refine models of shiftwork tolerance, the purported relationships between outcomes and modifiers of the adaptation process were explored. A series of empirical studies amongst shiftworkers, across a variety of work patterns and industries, examined the efficacy of demographic, circadian, personality and work-related variables as predictors of shiftwork tolerance. Trends were shown to be attenuated by shift type, industry type and length of exposure to the shift system.Using a phenomenological approach, Study 1 conducted a series of semi-structured interviews, investigating the aetiology and management of effects through the eyes of shiftworkers themselves. Analysis of recurrent themes supported established trends in the literature and showed some fit with a number of models, highlighting both outcome, and to a lesser extent, modifier variables. New relationships were also identified. Study 2 used this information to design a questionnaire for the collection of more objective data from the same site. Outcomes were capable of being meaningfully reduced into major problem domains. The number and predictive validity of modifiers varied according to the outcome under investigation, with similarities emerging between outcomes that correlated strongly with one another. Using the same approach, Study 3 examined the effect of the type of shift worked. Extent of problems and patterns of prediction showed a strong shift-dependent effect, with reliable trends emerging between those groups involved in nightwork and those not. Study’s 4 and 5 explored the effect of short- (5 weeks) and long-term (12 months) exposure. Longer exposure benefited certain attitude measures and enabled better adjustment of psychological health and sleep quality. Social and domestic disruption and physical health were affected to a similar degree in both studies and therefore, did not benefit from greater exposure. Despite predictive relationships being stronger at follow-up, they were inconsistent over time, suggesting that such interactions are an evolving process.Regardless of the shift type, industry type or length of exposure, attitudes toward shiftwork were most strongly predicted by work-related modifiers, health outcomes by circadian/personality modifiers, and sleep duration by demographic modifiers, suggesting that specific domains are differentially mediated. E-Thesis Swansea 1 10 2002 2002-10-01 10.23889/SUthesis.60187 COLLEGE NANME COLLEGE CODE Swansea University Doctoral Ph.D 2022-06-13T12:28:03.3565726 2022-06-13T12:18:09.5008749 Faculty of Medicine, Health and Life Sciences School of Psychology JOANNE HILL 1 60187__24294__6d07f75b09c0423aa0fc6094b1c25725.pdf 637278.pdf 2022-06-13T12:24:59.7122586 Output 21970749 application/pdf E-Thesis – open access true true eng
title Individual differences in adaptability to shiftwork : an exploration of models of shiftwork tolerance
spellingShingle Individual differences in adaptability to shiftwork : an exploration of models of shiftwork tolerance
JOANNE HILL
title_short Individual differences in adaptability to shiftwork : an exploration of models of shiftwork tolerance
title_full Individual differences in adaptability to shiftwork : an exploration of models of shiftwork tolerance
title_fullStr Individual differences in adaptability to shiftwork : an exploration of models of shiftwork tolerance
title_full_unstemmed Individual differences in adaptability to shiftwork : an exploration of models of shiftwork tolerance
title_sort Individual differences in adaptability to shiftwork : an exploration of models of shiftwork tolerance
author_id_str_mv 1f44b8afc07120d2c7b9f1462389e639
author_id_fullname_str_mv 1f44b8afc07120d2c7b9f1462389e639_***_JOANNE HILL
author JOANNE HILL
author2 JOANNE HILL
format E-Thesis
publishDate 2002
institution Swansea University
doi_str_mv 10.23889/SUthesis.60187
college_str Faculty of Medicine, Health and Life Sciences
hierarchytype
hierarchy_top_id facultyofmedicinehealthandlifesciences
hierarchy_top_title Faculty of Medicine, Health and Life Sciences
hierarchy_parent_id facultyofmedicinehealthandlifesciences
hierarchy_parent_title Faculty of Medicine, Health and Life Sciences
department_str School of Psychology{{{_:::_}}}Faculty of Medicine, Health and Life Sciences{{{_:::_}}}School of Psychology
document_store_str 1
active_str 0
description In order to refine models of shiftwork tolerance, the purported relationships between outcomes and modifiers of the adaptation process were explored. A series of empirical studies amongst shiftworkers, across a variety of work patterns and industries, examined the efficacy of demographic, circadian, personality and work-related variables as predictors of shiftwork tolerance. Trends were shown to be attenuated by shift type, industry type and length of exposure to the shift system.Using a phenomenological approach, Study 1 conducted a series of semi-structured interviews, investigating the aetiology and management of effects through the eyes of shiftworkers themselves. Analysis of recurrent themes supported established trends in the literature and showed some fit with a number of models, highlighting both outcome, and to a lesser extent, modifier variables. New relationships were also identified. Study 2 used this information to design a questionnaire for the collection of more objective data from the same site. Outcomes were capable of being meaningfully reduced into major problem domains. The number and predictive validity of modifiers varied according to the outcome under investigation, with similarities emerging between outcomes that correlated strongly with one another. Using the same approach, Study 3 examined the effect of the type of shift worked. Extent of problems and patterns of prediction showed a strong shift-dependent effect, with reliable trends emerging between those groups involved in nightwork and those not. Study’s 4 and 5 explored the effect of short- (5 weeks) and long-term (12 months) exposure. Longer exposure benefited certain attitude measures and enabled better adjustment of psychological health and sleep quality. Social and domestic disruption and physical health were affected to a similar degree in both studies and therefore, did not benefit from greater exposure. Despite predictive relationships being stronger at follow-up, they were inconsistent over time, suggesting that such interactions are an evolving process.Regardless of the shift type, industry type or length of exposure, attitudes toward shiftwork were most strongly predicted by work-related modifiers, health outcomes by circadian/personality modifiers, and sleep duration by demographic modifiers, suggesting that specific domains are differentially mediated.
published_date 2002-10-01T04:56:08Z
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score 11.099938

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