Melbourne School of Health Sciences Collected Works - Research Publications

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    Predicting muscle loss during lung cancer treatment (PREDICT): protocol for a mixed methods prospective study
    Kiss, NK ; Denehy, L ; Edbrooke, L ; Prado, CM ; Ball, D ; Siva, S ; Abbott, G ; Ugalde, A ; Fraser, SF ; Everitt, S ; Hardcastle, N ; Wirth, A ; Daly, RM (BMJ PUBLISHING GROUP, 2021-09)
    INTRODUCTION: Low muscle mass and low muscle attenuation (radiodensity), reflecting increased muscle adiposity, are prevalent muscle abnormalities in people with lung cancer receiving curative intent chemoradiation therapy (CRT) or radiation therapy (RT). Currently, there is a limited understanding of the magnitude, determinants and clinical significance of these muscle abnormalities in the lung cancer CRT/RT population. The primary objective of this study is to identify the predictors of muscle abnormalities (low muscle mass and muscle attenuation) and their depletion over time in people with lung cancer receiving CRT/RT. Secondary objectives are to assess the magnitude of change in these parameters and their association with health-related quality of life, treatment completion, toxicities and survival. METHODS AND ANALYSIS: Patients diagnosed with lung cancer and planned for treatment with CRT/RT are invited to participate in this prospective observational study, with a target of 120 participants. The impact and predictors of muscle abnormalities (assessed via CT at the third lumbar vertebra) prior to and 2 months post CRT/RT on the severity of treatment toxicities, treatment completion and survival will be assessed by examining the following variables: demographic and clinical factors, weight loss, malnutrition, muscle strength, physical performance, energy and protein intake, physical activity and sedentary time, risk of sarcopenia (Strength, Assistance in walking, Rise from a chair, Climb stairs, Falls history (SARC-F) score alone and with calf-circumference) and systemic inflammation. A sample of purposively selected participants with muscle abnormalities will be invited to take part in semistructured interviews to understand their ability to cope with treatment and explore preference for treatment strategies focused on nutrition and exercise. ETHICS AND DISSEMINATION: The PREDICT study received ethics approval from the Human Research Ethics Committee at Peter MacCallum Cancer Centre (HREC/53147/PMCC-2019) and Deakin University (2019-320). Findings will be disseminated through peer review publications and conference presentations.
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    How is physical activity measured in lung cancer? A systematic review of outcome measures and their psychometric properties
    Edbrooke, L ; Denehy, L ; Parry, SM ; Astin, R ; Jack, S ; Granger, CL (WILEY, 2017-02)
    Physical activity (PA) levels are low in patients with lung cancer. Emerging evidence supports the use of interventions to increase PA in this population. We aimed to (1) identify and synthesize outcome measures which assess PA levels in patients with lung cancer and (2) to evaluate, synthesize and compare the psychometric properties of these measures. A systematic review of articles from searches was conducted of five electronic databases and personal records. Eligible studies were those which assessed PA using either performance-based or patient-reported measures. For aim 2, studies identified in aim 1 reporting on at least one psychometric property (validity, reliability, responsiveness or measurement error) were included. Two independent reviewers assessed eligibility and risk of bias with the COnsensus-based Standards for the selection of health status Measurement INstruments. Thirty-four studies using 21 different measures of PA were identified. Seventeen studies used performance-based measures. The Godin Leisure Time Exercise Questionnaire (GLTEQ) was the most frequently used patient-reported measure. Psychometric properties were reported for 13 of these measures and most frequently for movement sensors. Two studies reported on properties of the GLTEQ. Quality ratings for risk of bias were low. There is significant heterogeneity amongst studies regarding method of PA measurement along the lung cancer continuum. Greater consensus could be achieved by using a consensus approach such as a Delphi process. Future studies should include assessment of psychometric properties of the measurement tool being used. Currently, it is recommended where feasible, both performance-based and patient-reported measurements of PA should be undertaken.
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    Associations between nutritional energy delivery, bioimpedance spectroscopy and functional outcomes in survivors of critical illness
    Fetterplace, K ; Beach, LJ ; MacIsaac, C ; Presneill, J ; Edbrooke, L ; Parry, SM ; Rechnitzer, T ; Curtis, R ; Berney, S ; Deane, AM ; Denehy, L (WILEY, 2019-12)
    BACKGROUND: Patients who survive critical illness frequently develop muscle weakness that can impact on quality of life; nutrition is potentially a modifiable risk factor. The present study aimed to explore the associations between cumulative energy deficits (using indirect calorimetry and estimated requirements), nutritional and functional outcomes. METHODS: A prospective single-centre observational study of 60 intensive care unit (ICU) patients, who were mechanically ventilated for at least 48 h, was conducted. Cumulative energy deficit was determined from artificial nutrition delivery compared to targets. Measurements included: (i) at recruitment and ICU discharge, weight, fat-free mass (bioimpedance spectroscopy) and malnutrition (Subjective Global Assessment score B/C); (ii) at awakening and ICU discharge, physical function (Physical Function in Intensive Care Test-scored) and muscle strength (Medical Research Council sum-score (MRC-SS). ICU-acquired weakness was defined as a MRC-SS score of less than 48/60. RESULTS: The median (interquartile range) cumulative energy deficit compared to the estimated targets up to ICU day 12 was 3648 (2514-5650) kcal. Adjusting for body mass index, age and severity of illness, cumulative energy deficit (per 1000 kcal) was independently associated with greater odds of ICU-acquired weakness [odds ratio (OR) = 2.1, 95% confidence interval (CI) = 1.4-3.3, P = 0.001] and malnutrition (OR = 1.9, 95% CI = 1.1-3.2, P = 0.02). In similar multivariable linear models, cumulative energy deficit was associated with reductions in fat-free mass (-1.3 kg; 95% CI = -2.4 to -0.2, P = 0.02) and physical function scores (-0.6 points; 95% CI = -0.9 to -0.3, P = 0.001). CONCLUSIONS: Cumulative energy deficit from artificial nutrition support was associated with reduced functional outcomes and greater loss of fat-free mass in ventilated ICU patients.
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    Improving the delivery of physical activity services in lung cancer: A qualitative representation of the patient's perspective
    Granger, CL ; Parry, SM ; Edbrooke, L ; Abo, S ; Leggett, N ; Dwyer, M ; Denehy, L (WILEY, 2019-01)
    OBJECTIVE: To explore patient experiences of, and preferences for, physical activity after a lung cancer diagnosis. METHODS: This was a qualitative study involving seven patients who had been treated for lung cancer within the previous 2 years. Participants attended a focus group interview. Conventional content analysis methodology was used to analyse the text by two independent researchers. RESULTS: Eight major themes emerged from the data. These were as follows: the influence of past lifestyle and chronic disease; the perceived benefits of physical activity; using physical activity to facilitate return to activities of daily living; the impact of symptoms, capacity and motivation; family and peer support; access to services; health professionals; and enjoyment of different types of physical activity. Patients suggested several factors that could improve their healthcare experience. These include access to exercise professionals particularly after cancer treatment; access to information about physical activity in different formats; supervision from health professionals and peer support; and use of behaviour change strategies to achieve sustainable increases in physical activity. CONCLUSION: Our results should be considered in the improvement of lung cancer care pathways as we strive to implement physical activity services into routine clinical care.
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    Efficacy of Prehabilitation Including Exercise on Postoperative Outcomes Following Abdominal Cancer Surgery: A Systematic Review and Meta-Analysis
    Waterland, JL ; McCourt, O ; Edbrooke, L ; Granger, CL ; Ismail, H ; Riedel, B ; Denehy, L (FRONTIERS MEDIA SA, 2021-03-19)
    Objectives: This systematic review set out to identify, evaluate and synthesise the evidence examining the effect of prehabilitation including exercise on postoperative outcomes following abdominal cancer surgery. Methods: Five electronic databases (MEDLINE 1946-2020, EMBASE 1947-2020, CINAHL 1937-2020, PEDro 1999-2020, and Cochrane Central Registry of Controlled Trials 1991-2020) were systematically searched (until August 2020) for randomised controlled trials (RCTs) that investigated the effects of prehabilitation interventions in patients undergoing abdominal cancer surgery. This review included any form of prehabilitation either unimodal or multimodal that included whole body and/or respiratory exercises as a stand-alone intervention or in addition to other prehabilitation interventions (such as nutrition and psychology) compared to standard care. Results: Twenty-two studies were included in the systematic review and 21 studies in the meta-analysis. There was moderate quality of evidence that multimodal prehabilitation improves pre-operative functional capacity as measured by 6 min walk distance (Mean difference [MD] 33.09 metres, 95% CI 17.69-48.50; p = <0.01) but improvement in cardiorespiratory fitness such as preoperative oxygen consumption at peak exercise (VO2 peak; MD 1.74 mL/kg/min, 95% CI -0.03-3.50; p = 0.05) and anaerobic threshold (AT; MD 1.21 mL/kg/min, 95% CI -0.34-2.76; p = 0.13) were not significant. A reduction in hospital length of stay (MD 3.68 days, 95% CI 0.92-6.44; p = 0.009) was observed but no effect was observed for postoperative complications (Odds Ratio [OR] 0.81, 95% CI 0.55-1.18; p = 0.27), pulmonary complications (OR 0.53, 95% CI 0.28-1.01; p = 0.05), hospital re-admission (OR 1.07, 95% CI 0.61-1.90; p = 0.81) or postoperative mortality (OR 0.95, 95% CI 0.43-2.09, p = 0.90). Conclusion: Multimodal prehabilitation improves preoperative functional capacity with reduction in hospital length of stay. This supports the need for ongoing research on innovative cost-effective prehabilitation approaches, research within large multicentre studies to verify this effect and to explore implementation strategies within clinical practise.
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    Exploring the Use of Two Brief Fatigue Screening Tools in Cancer Outpatient Clinics
    Pearson, EJ ; Drosdowsky, A ; Edbrooke, L ; Denehy, L (SAGE PUBLICATIONS INC, 2021-01)
    PURPOSE: Cancer fatigue guidelines recommend routine fatigue screening, with further assessment for people reporting moderate to severe fatigue. There is neither a gold-standard, nor a broadly accepted screening method, and knowledge about the impact of screening on care processes is limited. This study aimed to explore the feasibility of 2 fatigue screening methods and current clinical practice in cancer outpatient clinics. METHODS: Hospital outpatients attending cancer clinics during 1 week completed a five-item survey: a numeric scale for current tiredness, 2 categorical pictorial scales rating tiredness last week and the impact of fatigue (Fatigue Pictogram), screening tool preference and help needed for survey completion. Participant demographics and fatigue documentation by clinical staff for that appointment were extracted from medical records. Analyses used descriptive statistics. Groups were compared using appropriate statistical tests. RESULTS: Over 75% of participants rated their fatigue consistently as mild or significant on both screening tools. Of 1709 eligible outpatients, 533 (31%) completed the survey. Records were audited for 430 (81%) identifiable participants. Over half of the participants reported moderate or severe tiredness either "now" (237, 57%) and/or "last week" (226, 53%). Clinician documentation of fatigue seldom matched self-reports. Fatigue was rated as severe by 103 participants (24%), yet was noted in only 21 (20%) of these individuals' clinical notes. Both screening tools were equally preferred. CONCLUSION: The numeric rating scale and Fatigue Pictogram are equally applicable for screening fatigue in cancer outpatient care. There is a high prevalence of clinically significant fatigue in a hospital outpatient setting that is not documented. Adequate care pathways for further management should be established alongside fatigue screening.
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    Can an accelerometer-based monitor be used to accurately assess physical activity in a population of survivors of critical illness?
    Edbrooke, L ; Lythgo, N ; Goldsworthy, U ; Denehy, L (Canadian Center of Science and Education, 2012-04-28)
    PURPOSE: To investigate the validity and reliability of the Activity Monitoring Pod (AMP331) to record gait parameters in  healthy young adults (YA) and intensive care unit inpatients (ICU). METHODS: Fifteen YA completed a series of over-ground walks. Another 15 YA completed a series of treadmill walks. The ICU group (N=20) completed a series of over-ground walks with repeat trials. Gait parameters were recorded simultaneously for each walk. RESULTS: For the YA over-ground condition, no significant differences were found between the measures recorded by the systems. For the YA treadmill condition, 43% of the measures differed (P < .05). For the ICU group, the AMP331 underestimated distance and speed by 3m and 25cm/s respectively. Reliability measures for distance (ICC 0.99, 95%CI 0.98 - 0.99) and step count (ICC 0.99, 95%CI 0.99 - 1.00) were excellent. CONCLUSIONS: The AMP 331 is a valid instrument for recording basic gait parameters for over-ground walking in healthy YA and ICU survivors.
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    Implications for post critical illness trial design: sub-phenotyping trajectories of functional recovery among sepsis survivors
    Puthucheary, ZA ; Gensichen, JS ; Cakiroglu, AS ; Cashmore, R ; Edbrooke, L ; Heintze, C ; Neumann, K ; Wollersheim, T ; Denehy, L ; Schmidt, KFR (BMC, 2020-09-25)
    BACKGROUND: Patients who survive critical illness suffer from a significant physical disability. The impact of rehabilitation strategies on health-related quality of life is inconsistent, with population heterogeneity cited as one potential confounder. This secondary analysis aimed to (1) examine trajectories of functional recovery in critically ill patients to delineate sub-phenotypes and (2) to assess differences between these cohorts in both clinical characteristics and clinimetric properties of physical function assessment tools. METHODS: Two hundred ninety-one adult sepsis survivors were followed-up for 24 months by telephone interviews. Physical function was assessed using the Physical Component Score (PCS) of the Short Form-36 Questionnaire (SF-36) and Activities of Daily Living and the Extra Short Musculoskeletal Function Assessment (XSFMA-F/B). Longitudinal trajectories were clustered by factor analysis. Logistical regression analyses were applied to patient characteristics potentially determining cluster allocation. Responsiveness, floor and ceiling effects and concurrent validity were assessed within clusters. RESULTS: One hundred fifty-nine patients completed 24 months of follow-up, presenting overall low PCS scores. Two distinct sub-cohorts were identified, exhibiting complete recovery or persistent impairment. A third sub-cohort could not be classified into either trajectory. Age, education level and number of co-morbidities were independent determinants of poor recovery (AUROC 0.743 ((95%CI 0.659-0.826), p < 0.001). Those with complete recovery trajectories demonstrated high levels of ceiling effects in physical function (PF) (15%), role physical (RP) (45%) and body pain (BP) (57%) domains of the SF-36. Those with persistent impairment demonstrated high levels of floor effects in the same domains: PF (21%), RP (71%) and BP (12%). The PF domain demonstrated high responsiveness between ICU discharge and at 6 months and was predictive of a persistent impairment trajectory (AUROC 0.859 (95%CI 0.804-0.914), p < 0.001). CONCLUSIONS: Within sepsis survivors, two distinct recovery trajectories of physical recovery were demonstrated. Older patients with more co-morbidities and lower educational achievements were more likely to have a persistent physical impairment trajectory. In regard to trajectory prediction, the PF score of the SF-36 was more responsive than the PCS and could be considered for primary outcomes. Future trials should consider adaptive trial designs that can deal with non-responders or sub-cohort specific outcome measures more effectively.
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    A 12-Week Multi-Modal Exercise Program: Feasibility of Combined Exercise and Simplified 8-Style Tai Chi Following Lung Cancer Surgery
    Lu, T ; Denehy, L ; Cao, Y ; Cong, Q ; Wu, E ; Granger, CL ; Ni, J ; Edbrooke, L (SAGE PUBLICATIONS INC, 2020-08)
    OBJECTIVE: To assess the feasibility, safety, and preliminary effect of a 12-week multi-modal rehabilitation program targeted at improving health-related quality of life and physical activity levels of patients with lung cancer following treatment. METHODS: Patients with stage I to IIIA non-small cell lung cancer were included 6 to 12 weeks following completion of treatment. The intervention comprised of aerobic exercise (brisk walking), resistance training and 8-style Tai Chi. The 12-week program included 2 supervised center-based sessions per week of 90 minutes duration and home-based exercise. The primary outcomes were the feasibility and safety of the intervention. Secondary outcomes (assessed pre and post program) were physical and patient-reported outcomes. RESULTS: Seventy-eight patients were approached during the 6-month recruitment period and 17 (22%) consented to the study. Eight participants (47%) met the definition of adherence to the program (attending at least 70% of supervised sessions). No serious adverse events occurred. A significant reduction in anxiety and depression was observed post-program. In addition, improvements in respiratory function, sleep quality, and some health-related quality of life domains were observed post-program. There were no significant differences in functional capacity or physical activity levels. CONCLUSION: This multi-modal exercise training program was safe, although the feasibility of the program in its current state is not supported given the low consent rate and low adherence to the intervention.
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    Home-based rehabilitation in inoperable non-small cell lung cancer-the patient experience
    Edbrooke, L ; Denehy, L ; Granger, CL ; Kapp, S ; Aranda, S (SPRINGER, 2020-01)
    PURPOSE: Exercise is important in lung cancer, yet most people do not meet the physical activity guidelines. The aim of this study was to characterise the views and experiences of participants with inoperable lung cancer who completed a home-based rehabilitation program. METHODS: Ninety-two participants were recruited (45 intervention group [IG], 47 usual care). Individual semi-structured interviews were conducted with participants randomised to the IG of a trial of home-based exercise, behaviour change and symptom management. Data were independently coded by two researchers, cross-checked and analysed using content analysis with a summary of arising themes. RESULTS: Of the IG (25/45), 55% were interviewed: mean (SD) age 67 (13) years; male 52%; disease stage n (%) III = 9 (36), IV = 11 (44); radical treatment intent n (%) 13 (52). The majority of participants reported program benefits, both in the physical domain (reduced sedentary time and improved strength, fitness and function) and the mental domain (motivation to keep healthy, preventing boredom). Support to self-manage symptoms was well received and many participants reported increased confidence in managing their symptoms. Exercise enablers included having expert health professional support; motivation to be stronger and better prepared for future challenges; and having an achievable and familiar program that was monitored. Treatment side-effects, pain from comorbidities and the weather were exercise barriers. For the majority of participants the use of a Fitbit™ activity tracker, text message exercise reminders and an exercise diary helped to promote adherence. CONCLUSIONS: This home-based rehabilitation program was acceptable to most participants with multiple benefits reported including improved fitness, motivation and ability to manage symptoms.