Dorothea Dumuid
Biographic Data
| ID | 4594117 |
|---|---|
| NAME | Dorothea Dumuid |
| GIVEN NAMES | Dorothea |
| FAMILY NAME | Dumuid |
| SIGNATURE | DUMUID D |
| AFFILIATIONS | University of South Australia |
| ORCID | 0000-0003-3057-0963 |
| VERIFIED | Yes |
| TOTAL WORKS | 32 |
| TOTAL CITATIONS | 1 |
| WORKS AS AUTHOR | 32 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 2016 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 1 |
Well‐being decline during adolescence
BACKGROUND: The transition from primary-to-secondary school significantly impacts students' well-being. However, existing research provides limited insight into the long-term impact of school transition on well-being, and no studies have disentangled age-related changes from transition-specific effects. This study leverages a natural experiment, where an educational reform resulted in two different age cohorts transitioning simultaneously, to dis…
Bayesian Multilevel Compositional Data Analysis with the R Package multilevelcoda
Multilevel compositional data, such as data sampled over time that are non-negative and sum to a constant value, are common in various fields. However, there is currently no software specifically built to model compositional data in a multilevel framework. The R package multilevelcoda implements a collection of tools for modeling compositional data in a Bayesian multivariate, multilevel pipeline. The user-friendly setup only requires the data, mo…
Temporal trends in after-school activities among students from 2019 to 2022
Students’ participation in after-school activities changed during the COVID-19 pandemic. However, it remains unclear whether these changes were primarily attributable to the pandemic itself or to age-related developmental trends. This study aims to examine how activity patterns shifted during the pandemic and distinguish temporal trends related to the pandemic from normal developmental changes. This repeated-measure cross-sectional study included…
Hour Physical Activity, Sedentary Behaviour and Sleep Profiles in Individuals With Cancer
BACKGROUND: Behaviours across a 24-hour day, including physical activity, sedentary time and sleep, are disrupted following cancer and contribute to cancer-related outcomes. This study describes the day-to-day 24-hour behaviour profiles of individuals with and without cancer, considering time since diagnosis and cancer types. METHODS: =7.4±6.1 years) compared with healthy (free of diseases) individuals (n=13 722). Diagnoses were identified using …
The association between 24-h movement behaviours and adiposity among Australian preschoolers
Despite the association between more time spent in MVPA and higher BMI z-scores, promoting a balanced amount of time in each 24-h movement behaviour-more MVPA, less sedentary time, and sufficient sleep-remains important for overall health. Future studies should address methodological challenges (e.g. recruitment bias that may exist in the parents/children willing to participate versus the general population, recall bias in parent reported sleep d…
A concept mapping approach to explore the perceived facilitating factors in shifting sedentary behavior into (more) physical activity
HCPs and sedentary and/or inactive adults identified factors at the intra- and interpersonal level which were rated as feasible, effective and changeable, as well as factors at the responsibility of external stakeholders such as employers or policy makers. These results highlight that future interventions aimed at shifting SB into PA include a multilevel challenge
Associations of reallocating time between movement behaviours with adiposity and physical fitness among employees
There is a beneficial association of reallocating more time to MVPA with adiposity and fitness, and a detrimental association of reallocating more time to SB and LPA with adiposity
Daily, prospective associations between sleep architecture and affect
BACKGROUND: Emerging statistical methods addressing the multilevel compositional nature of sleep architecture can offer insights into how daily time reallocations between sleep stages (total wake time in bed [TWT], light sleep [Non rapid eye movement stage 1 and 2], slow wave sleep [SWS], and rapid eye movement [REM] sleep) are associated with post-sleep affect. PURPOSE: This study investigated the daily, prospective association between sleep arc…
‘He wants to play football but not available here … ’ Parent perspectives of Aboriginal and Torres Strait Islander child physical activity and sport participation
Aboriginal and Torres Strait Islander children have higher physical activity participation levels than non-Aboriginal children. However, this trend reverses in adulthood. Data came from the Longitudinal Study of Indigenous Children (LSIC) at age 8–13 years. Using conventional content analysis, interviews with primary caregivers of Aboriginal and Torres Strait Islander children were analyzed to understand current sports and physical activity parti…
The relationship between non-communicable disease risk and mental wellbeing in adolescence
Our analysis also shows that these NCD risks (both individual risks and co-occurring risk count) are related to poorer profiles of mental wellbeing in adolescents, after adjusting for likely confounders
Harmonizing measurement tools
Compared to the ActiGraph, the DABQ showed accurate time-use estimates for sleep but presented poor to moderate evidence of validity regarding SB, LPA and MVPA. This was shown in underestimations regarding SB and MVPA, and overestimations regarding LPA. However, educational level and data processing methods contributed to these variations
Effectiveness of physical activity interventions for improving depression, anxiety and distress
The Goldilocks Day for healthy adiposity measures among children and adolescents
Background The optimal balance of time spent on daily movement behaviors (“The Goldilocks Day”) associated with childhood obesity remains unknown. Objective To estimate the optimal durations of sleep, sedentary behavior (SB), light physical activity (LPA), and moderate-to-vigorous physical activity (MPVA) associated with excess adiposity in a paediatric population. Methods Accelerometer-measured 24-h movement behaviors were obtained from 659 Czec…
Changes in fitness and fatness in Australian schoolchildren during the summer holidays
Australia New Zealand Clinical Trials Registry, identifier ACTRN12618002008202. Retrospectively registered on 14 December 2018
Association between the use of weight management strategies and weight change among Australian adults over 12 months
The use of weight management strategies appears to be common. Being physically active was associated with greater weight loss. Individuals who accepted their current body weight were less likely to use weight management strategies. Fasting and the use of supplements were associated with poorer mental health. Promoting physical activity as a weight management strategy appears important, particularly considering its multiple health benefits
The Physical Behaviour Intensity Spectrum and Body Mass Index in School-Aged Youth
We examined the compositional associations between the intensity spectrum derived from incremental acceleration intensity bands and the body mass index (BMI) z-score in youth, and investigated the estimated differences in BMI z-score following time reallocations between intensity bands. School-aged youth from 63 schools wore wrist accelerometers, and data of 1453 participants (57.5% girls) were analysed. Nine acceleration intensity bands (range: …
Goldilocks Days
BACKGROUND: One size rarely fits all in population health. Differing outcomes may compete for best allocations of time. Among children aged 11-12 years, we aimed to (1) describe optimal 24-hour time use for diverse physical, cognitive/academic and well-being outcomes, (2) pinpoint the 'Goldilocks Day' that optimises all outcomes and (3) develop a tool to customise time-use recommendations. METHODS: In 2004, the Longitudinal Study of Australian Ch…
Sport and academic performance in Australian Indigenous children
Objective Sport may promote academic performance through physiological and psychosocial mechanisms. We aimed to examine the association between sports participation and academic performance in Aboriginal and Torres Strait Islander children. Methods Participants were from four successive waves of Australia’s Longitudinal Study of Indigenous Children ( n = 303, baseline age 5–6 y). Cumulative sports participation was regressed against academic perf…
Cross-Sectional and Longitudinal Associations between 24-Hour Movement Behaviours, Recreational Screen Use and Psychosocial Health Outcomes in Children
It remains unclear whether the time-use composition of 24-h movement behaviours (sleep, sedentary time (ST), physical activity (PA)) and recreational screen use are independently associated with psychosocial health. This study examined the cross-sectional and longitudinal associations between 24-h movement behaviour composition, recreational screen use and psychosocial health outcomes in children. Measures completed at baseline (n = 127; 11.7 yea…
Day-to-day pattern of work and leisure time physical behaviours
While low SES adults' leisure time was mostly sedentary, their work time was predominantly standing. Work physical behaviours differently influenced day-to-day leisure time behaviours. Thus, public health initiatives aiming to change leisure time behaviours among low SES adults should consider the influence of work physical behaviours
Annual rhythms in adults’ lifestyle and health (Aria)
Australia New Zealand Clinical Trials Registry, identifier ACTRN12619001430123 . Prospectively registered on 16 October 2019
Are all MVPA minutes equal? Associations between MVPA characteristics, independent of duration, and childhood adiposity
Characteristics of MVPA other than duration and intensity appear to be unrelated to adiposity
Associations Between 24-Hour Time Use and Academic Achievement in Australian Primary School–Aged Children
Background Previous research has examined associations between individual activity behaviors and academic achievement. Yet activity behaviors should be analyzed together because they are codependent parts of the 24-hour day. Aims This study aims to explore the associations between all daily activity behaviors (sleep, sedentary time, light physical activity [LPA], and moderate-to-vigorous physical activity [MVPA]) and academic achievement using co…
Lifestyle clusters and academic achievement in Australian Indigenous children
Participation in sport and physical activity can improve academic outcomes and has been identified as a potential mechanism for addressing educational disadvantage and 'closing the gap' in Australian Indigenous communities. To explore this possibility in relation to sport and lifestyle we performed a cluster analysis on data from the Footprints in Time study (also known as the Longitudinal Study of Indigenous Children), using data from Waves 3-6 …
Compositional Data Analysis in Time-Use Epidemiology
In recent years, the focus of activity behavior research has shifted away from univariate paradigms (e.g., physical activity, sedentary behavior and sleep) to a 24-h time-use paradigm that integrates all daily activity behaviors. Behaviors are analyzed relative to each other, rather than as individual entities. Compositional data analysis (CoDA) is increasingly used for the analysis of time-use data because it is intended for data that convey rel…
Goldilocks Days
BACKGROUND: One size rarely fits all in population health. Differing outcomes may compete for best allocations of time. Among children aged 11-12 years, we aimed to (1) describe optimal 24-hour time use for diverse physical, cognitive/academic and well-being outcomes, (2) pinpoint the 'Goldilocks Day' that optimises all outcomes and (3) develop a tool to customise time-use recommendations. METHODS: In 2004, the Longitudinal Study of Australian Ch…
Does home equipment contribute to socioeconomic gradients in Australian children’s physical activity, sedentary time and screen time
Children with less electronic devices, particularly in their bedrooms, participated in less screen time, regardless of socioeconomic status. Socioeconomic disparities were identified in children's moderate-to-vigorous physical activity, however socioeconomic status was inconsistently related to possession of active play equipment. Home active play equipment was therefore not a clear contributor to the socioeconomic gradients in Australian childre…
Compositional data analysis for physical activity, sedentary time and sleep research
The health effects of daily activity behaviours (physical activity, sedentary time and sleep) are widely studied. While previous research has largely examined activity behaviours in isolation, recent studies have adjusted for multiple behaviours. However, the inclusion of all activity behaviours in traditional multivariate analyses has not been possible due to the perfect multicollinearity of 24-h time budget data. The ensuing lack of adjustment …
Patterns of Time Use across the Chronic Obstructive Pulmonary Disease Severity Spectrum
Descriptions of time use patterns in people with chronic obstructive pulmonary disease (COPD) are scarce and the relationship between use-of-time and COPD severity remains unclear. This study aimed to describe a typical day for people with COPD and to explore the differences in time-use patterns across the Body Mass-Index, Airflow Obstruction, Dyspnoea and Exercise Capacity (BODE) index using compositional analyses. Using a cross-sectional design…
Adiposity and the isotemporal substitution of physical activity, sedentary time and sleep among school-aged children
The compositional isotemporal model caters for the constrained and therefore relative nature of activity behaviour data and enables all daily behaviours to be included in a single statistical model. The traditional model treats data as real variables, thus the constrained nature of time is not accounted for, nor reflected in the findings. Findings from compositional isotemporal substitution support the importance of MVPA to children's health, and…
Human development index, children’s health-related quality of life and movement behaviors
Life on holidays
In this subsample of a nationally representative survey of Australian children, holidays were characterised by longer sleep and higher TV and videogame time, lower vigorous activity and lower TDEE. Uncompensated by dietary adjustments, these differences would result in an accumulation of about 650 g of fat over a six-week holiday period. Holiday activity patterns may be a promising focus for obesity prevention efforts
Life on holidays
Australia New Zealand Clinical Trials Registry, identifier ACTRN12618002008202 . Retrospectively registered on 14 December 2018
Associations Between 24-Hour Time Use and Academic Achievement in Australian Primary School–Aged Children
Background Previous research has examined associations between individual activity behaviors and academic achievement. Yet activity behaviors should be analyzed together because they are codependent parts of the 24-hour day. Aims This study aims to explore the associations between all daily activity behaviors (sleep, sedentary time, light physical activity [LPA], and moderate-to-vigorous physical activity [MVPA]) and academic achievement using co…
Lifestyle clusters and academic achievement in Australian Indigenous children
Participation in sport and physical activity can improve academic outcomes and has been identified as a potential mechanism for addressing educational disadvantage and 'closing the gap' in Australian Indigenous communities. To explore this possibility in relation to sport and lifestyle we performed a cluster analysis on data from the Footprints in Time study (also known as the Longitudinal Study of Indigenous Children), using data from Waves 3-6 …
Compositional Data Analysis in Time-Use Epidemiology
In recent years, the focus of activity behavior research has shifted away from univariate paradigms (e.g., physical activity, sedentary behavior and sleep) to a 24-h time-use paradigm that integrates all daily activity behaviors. Behaviors are analyzed relative to each other, rather than as individual entities. Compositional data analysis (CoDA) is increasingly used for the analysis of time-use data because it is intended for data that convey rel…
Sport and academic performance in Australian Indigenous children
Objective Sport may promote academic performance through physiological and psychosocial mechanisms. We aimed to examine the association between sports participation and academic performance in Aboriginal and Torres Strait Islander children. Methods Participants were from four successive waves of Australia’s Longitudinal Study of Indigenous Children ( n = 303, baseline age 5–6 y). Cumulative sports participation was regressed against academic perf…
Cross-Sectional and Longitudinal Associations between 24-Hour Movement Behaviours, Recreational Screen Use and Psychosocial Health Outcomes in Children
It remains unclear whether the time-use composition of 24-h movement behaviours (sleep, sedentary time (ST), physical activity (PA)) and recreational screen use are independently associated with psychosocial health. This study examined the cross-sectional and longitudinal associations between 24-h movement behaviour composition, recreational screen use and psychosocial health outcomes in children. Measures completed at baseline (n = 127; 11.7 yea…
Day-to-day pattern of work and leisure time physical behaviours
While low SES adults' leisure time was mostly sedentary, their work time was predominantly standing. Work physical behaviours differently influenced day-to-day leisure time behaviours. Thus, public health initiatives aiming to change leisure time behaviours among low SES adults should consider the influence of work physical behaviours
Annual rhythms in adults’ lifestyle and health (Aria)
Australia New Zealand Clinical Trials Registry, identifier ACTRN12619001430123 . Prospectively registered on 16 October 2019
Are all MVPA minutes equal? Associations between MVPA characteristics, independent of duration, and childhood adiposity
Characteristics of MVPA other than duration and intensity appear to be unrelated to adiposity
The Physical Behaviour Intensity Spectrum and Body Mass Index in School-Aged Youth
We examined the compositional associations between the intensity spectrum derived from incremental acceleration intensity bands and the body mass index (BMI) z-score in youth, and investigated the estimated differences in BMI z-score following time reallocations between intensity bands. School-aged youth from 63 schools wore wrist accelerometers, and data of 1453 participants (57.5% girls) were analysed. Nine acceleration intensity bands (range: …
Goldilocks Days
BACKGROUND: One size rarely fits all in population health. Differing outcomes may compete for best allocations of time. Among children aged 11-12 years, we aimed to (1) describe optimal 24-hour time use for diverse physical, cognitive/academic and well-being outcomes, (2) pinpoint the 'Goldilocks Day' that optimises all outcomes and (3) develop a tool to customise time-use recommendations. METHODS: In 2004, the Longitudinal Study of Australian Ch…
Effectiveness of physical activity interventions for improving depression, anxiety and distress
The Goldilocks Day for healthy adiposity measures among children and adolescents
Background The optimal balance of time spent on daily movement behaviors (“The Goldilocks Day”) associated with childhood obesity remains unknown. Objective To estimate the optimal durations of sleep, sedentary behavior (SB), light physical activity (LPA), and moderate-to-vigorous physical activity (MPVA) associated with excess adiposity in a paediatric population. Methods Accelerometer-measured 24-h movement behaviors were obtained from 659 Czec…
Changes in fitness and fatness in Australian schoolchildren during the summer holidays
Australia New Zealand Clinical Trials Registry, identifier ACTRN12618002008202. Retrospectively registered on 14 December 2018
Association between the use of weight management strategies and weight change among Australian adults over 12 months
The use of weight management strategies appears to be common. Being physically active was associated with greater weight loss. Individuals who accepted their current body weight were less likely to use weight management strategies. Fasting and the use of supplements were associated with poorer mental health. Promoting physical activity as a weight management strategy appears important, particularly considering its multiple health benefits
‘He wants to play football but not available here … ’ Parent perspectives of Aboriginal and Torres Strait Islander child physical activity and sport participation
Aboriginal and Torres Strait Islander children have higher physical activity participation levels than non-Aboriginal children. However, this trend reverses in adulthood. Data came from the Longitudinal Study of Indigenous Children (LSIC) at age 8–13 years. Using conventional content analysis, interviews with primary caregivers of Aboriginal and Torres Strait Islander children were analyzed to understand current sports and physical activity parti…
The relationship between non-communicable disease risk and mental wellbeing in adolescence
Our analysis also shows that these NCD risks (both individual risks and co-occurring risk count) are related to poorer profiles of mental wellbeing in adolescents, after adjusting for likely confounders
Harmonizing measurement tools
Compared to the ActiGraph, the DABQ showed accurate time-use estimates for sleep but presented poor to moderate evidence of validity regarding SB, LPA and MVPA. This was shown in underestimations regarding SB and MVPA, and overestimations regarding LPA. However, educational level and data processing methods contributed to these variations
The association between 24-h movement behaviours and adiposity among Australian preschoolers
Despite the association between more time spent in MVPA and higher BMI z-scores, promoting a balanced amount of time in each 24-h movement behaviour-more MVPA, less sedentary time, and sufficient sleep-remains important for overall health. Future studies should address methodological challenges (e.g. recruitment bias that may exist in the parents/children willing to participate versus the general population, recall bias in parent reported sleep d…
Medicine (27 works) · Obesity, Physical Activity, Diet (21 works) · Physical therapy (20 works) · Physical activity (19 works) · Gerontology (17 works) · Demography (16 works) · Physical Activity and Health (16 works) · Biostatistics (14 works) · Demography (13 works) · Epidemiology (12 works)