UPSI Digital Repository (UDRep)
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Abstract : Universiti Pendidikan Sultan Idris |
This thesis investigates how people make judgements of their sleep quality and the
temporal association between sleep and physical activity in people with and without
chronic pain. In doing so, the thesis used a multi-methodological approach comprising
qualitative (Chapter 3), experimental (Chapter 4) and daily process studies (Chapters 5
and 6). The qualitative study presented in Chapter 3 explored how people with and
without chronic pain define their sleep quality and to what extent judgments of sleep
quality differ with the presence of pain (n= 17). The experimental study presented in
Chapter 4 quantitatively examined the relative importance of 17 parameters of sleep
quality in good and poor sleepers (n= 100). This study conceptualised sleep quality as a
decision-making process and used a choice-based conjoint analysis to identify
parameters that shape people's judgement of sleep quality. Then the thesis shifts its
focus to the relationship between sleep and physical activity in Chapters 5 and 6. Using
self-reported measures, the daily process study presented in Chapter 5 investigated the
temporal within-person association between sleep and physical activity in healthy young
adults (n= 118). Using both self-reported and objective measures of sleep and physical
activity, a follow-up daily process study was conducted in people with chronic pain (n=
51, Chapter 6). In addition, the study presented in Chapter 6 also explored the roles of
pain and other psychological variables (e.g., mood) that may interact with sleep to affect
the regulation of physical activity. The results across studies converge to suggest that
sleep quality judgement is a retrospective decision-making process dependent on both
daytime and nighttime processes and that subsequently influence daytime functioning
such as physical activity and mood in chronic pain patients. Therefore, future
investigations and interventions should consider the possibility of broadening the focus
to addressing chronic pain patient's perception of sleep quality and the impact of poor
sleep on daytime processes, for improving sleep quality, engagement in physical activity
and the overall quality of life.
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