ORCID Profile
0000-0002-6492-1197
Current Organisations
University of Queensland
,
Sunshine Coast University Hospital
,
Sunshine Coast University Private Hospital
,
Griffith University
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Publisher: Wiley
Date: 14-03-2019
DOI: 10.1111/AJCO.13140
Abstract: Stage III non-small cell lung cancer (NSCLC) makes up a third of all NSCLC cases and is potentially curable. Despite this 5-year survival rates remain between 15% and 20% with chemoradiation treatment alone given with curative intent. With the recent exciting breakthroughs in immunotherapy use (durvalumab) for stage III NSCLC, further improvements in patient survival can be expected. Most patients with stage III NSCLC present initially to their general practitioner (GP). The recommended time from GP referral to first specialist appointment is less than 14 days with treatment initiated within 42 days. Our review found that there is a shortfall in meeting these recommendations, however a number of initiatives have been established in Australia to improve timely and accurate diagnosis and treatment patterns. The lung cancer multidisciplinary team (MDT) is critical to consistency of evidence-based diagnosis and treatment and can improve patient survival. We aimed to review current patterns of care and clinical practice recommendations for stage III NSCLC across Australia and identify opportunities to improve practice in referral, diagnosis and treatment pathways.
Publisher: Wiley
Date: 04-03-2020
DOI: 10.1002/CAM4.2948
Publisher: Cold Spring Harbor Laboratory
Date: 10-07-2022
DOI: 10.1101/2022.07.08.22277398
Abstract: Vaccination is the cornerstone of the global public health response to the COVID-19 pandemic. Excess morbidity and mortality of COVID-19 infection is seen in people with cancer. COVID-19 vaccine hesitancy has been observed in this medically vulnerable population, although associated attitudes and beliefs remain poorly understood. An online cross-sectional survey of people with solid organ cancers was conducted through nine health services across Australia. Demographics, cancer-related characteristics, and vaccine uptake were collected. Perceptions and beliefs regarding COVID-19 vaccination were assessed using the Oxford COVID-19 Vaccine Hesitancy Scale, the Oxford COVID-19 Vaccine Confidence and Complacency Scale, and the Disease Influenced Vaccine Acceptance Scale-6. Between June and October 2021, 2691 people with solid organ cancers completed the survey. Median age was 62.5 years ( SD =11.8 range 19-95), 40.9% were male, 71.3% lived in metropolitan areas, and 90.3% spoke English as their first language. The commonest cancer diagnoses were breast (36.6%), genitourinary (18.6%) and gastrointestinal (18.3%) 59.2% had localized disease and 56.0% were receiving anti-cancer therapy. Most participants (79.7%) had at least one COVID-19 vaccine dose. Vaccine uptake was higher in people who were older, male, metropolitan, spoke English as a first language, and had a cancer diagnosis for more than six months. Vaccine hesitancy was higher in people who were younger, female, spoke English as a non-dominant language and lived in a regional location, and lower in people with genitourinary cancer. Vaccinated respondents were more concerned about being infected with COVID-19 and less concerned about vaccine safety and efficacy. People with cancer have concerns about acquiring COVID-19, which they balance against vaccine-related concerns about the potential impact on their disease progress and/or treatment. Detailed exploration of concerns in cancer patients provides valuable insights, both for discussions with in idual patients and public health messaging for this vulnerable population.
Publisher: AME Publishing Company
Date: 04-2020
Publisher: Wiley
Date: 08-01-2019
Abstract: The multidisciplinary team meeting (MDTM) approach is accepted as standard of care to optimise treatment for patients diagnosed with cancer. This retrospective audit reviews the proportion of patients whose care is being discussed at cancer MDTMs within the Sunshine Coast Hospital and Health Service (SCHHS). Patients included were those diagnosed with cancer within the SCHHS between 2010 and 2015, and subsequently referred to a public MDTM for discussion. Data were extracted from the Queensland Cancer Control Analysis Team (QCCAT) database regarding the incidence of breast, lung, upper gastrointestinal (GI), colorectal, genitourinary and malignant haematological cancers and the number of patients referred to the corresponding MDTM. Data from 2015 show referral rates to MDTMs as follows: lung 100%, upper gastrointestinal 100%, colorectal 64%, breast 60%, malignant haematology 40% and genitourinary 28%. Of the genitourinary presentations, 70% were prostate cases and 14% bladder cases. Review of genitourinary MDTM outcomes found that, of the patients with prostate cancer discussed, 30% were metastatic, 19% were poor surgical candidates and 15% had biochemical recurrence. This audit demonstrates variable utilisation of MDTMs between tumour streams. Our study shows a high and increasing referral rate to all tumour stream MDTMs except for genitourinary. This suggests a possible underutilisation of genitourinary MDTMs to discuss treatment options for patients with genitourinary cancer. Collaborative research is warranted to further investigate whether this is a local or widespread issue.
Publisher: S. Karger AG
Date: 14-10-2020
DOI: 10.1159/000510446
Abstract: b i Background: /i /b Trimodality therapy (TMT) with neoadjuvant chemoradiotherapy (nCRT) using concurrent carboplatin plus paclitaxel (CP) followed by surgery is the standard of care for locoregional esophageal or gastroesophageal junction (GEJ) cancers. Alternatively, nCRT with cisplatin plus fluorouracil (CF) can be used. Definitive chemoradiotherapy (dCRT) with CP or CF can be used if surgery is not planned. In the absence of comparative trials, we aimed to evaluate outcomes of CP and CF in the settings of TMT and dCRT. b i Methods: /i /b A single-site, retrospective cohort study was conducted at the Princess Margaret Cancer Centre to identify all patients who received CRT for locoregional esophageal or GEJ cancer. Overall survival (OS) and disease-free survival (DFS) were assessed using the Kaplan-Meier method and multivariable Cox regression model. The inverse probability treatment weighting (IPTW) method was used for sensitivity analysis. b i Results: /i /b Between 2011 and 2015, 93 patients with esophageal (49%) and GEJ (51%) cancers underwent nCRT ( i n /i = 67 72%) or dCRT ( i n /i = 26 28%). Median age was 62.3 years and 74% were male. Median follow-up was 23.9 months. Comparing CP to CF in the setting of TMT, the OS and DFS rates were similar. In the setting of dCRT, CP was associated with significantly inferior 3-year OS (36 vs. 63% i /i = 0.001 HR 3.1 95% CI: 1.2–7.7) and DFS (0 vs. 41% i /i = 0.004 HR 3.6 95% CI: 1.4–8.9) on multivariable and IPTW sensitivity analyses. b i Conclusions: /i /b TMT with CF and CP produced comparable outcomes. However, for dCRT, CF may be a superior regimen.
Publisher: AMPCo
Date: 11-2015
DOI: 10.5694/MJA15.00190
Abstract: To compare the dose intensity and toxicity profiles for patients undergoing chemotherapy at the Townsville Cancer Centre (TCC), a tertiary cancer centre in northern Queensland, with those for patients treated in Mount Isa, supervised by the same medical oncologists via teleoncology. A quasi-experimental design comparing two patient groups. TCC and Mount Isa Hospital, which both operate under the auspices of the Townsville Teleoncology Network (TTN). Eligible patients who received chemotherapy at TCC or Mt Isa Hospital between 1 May 2007 and 30 April 2012. Teleoncology model for managing cancer patients in rural towns. Dose intensity (doses, number of cycles and lines of treatment) and toxicity rates (rate of serious side effects, hospital admissions and mortality). Over 5 years, 89 patients received a total of 626 cycles of various chemotherapy regimens in Mount Isa. During the same period, 117 patients who received a total of 799 cycles of chemotherapy at TCC were eligible for inclusion in the comparison group. There were no significant differences between the Mount Isa and TCC patients in most demographic characteristics, mean numbers of treatment cycles, dose intensities, proportions of side effects, and hospital admissions. There were no toxicity-related deaths in either group. It appears safe to administer chemotherapy in rural towns under the supervision of medical oncologists from larger centres via teleoncology, provided that rural health care resources and governance arrangements are adequate.
Publisher: MDPI AG
Date: 20-01-2023
Abstract: Background: People with chronic illnesses have increased morbidity and mortality associated with COVID-19 infection. The influence of a person’s serious and/or comorbid chronic illness on COVID-19 vaccine uptake is not well understood. Aim: To undertake an in-depth exploration of factors influencing COVID-19 vaccine uptake among those with various serious and/or chronic diseases in the Australian context, using secondary data analysis of a survey study. Methods: Adults with cancer, diabetes and multiple sclerosis (MS) were recruited from 10 Australian health services to undertake a cross-sectional online survey (30 June to 5 October 2021) about COVID-19 vaccine uptake, vaccine hesitancy, confidence and complacency and disease-related decision-making impact. Free-text responses were invited regarding thoughts and feelings about the interaction between the participant’s disease, COVID-19, and vaccination. Qualitative thematic analysis was undertaken using an iterative process and representative verbatim quotes were chosen to illustrate the themes. Results: Of 4683 survey responses (cancer 3560, diabetes 842, and MS 281), 1604 (34.3%) included free-text comments for qualitative analysis. Participants who provided these were significantly less likely to have received a COVID-19 vaccination than those who did not comment (72.4% and 86.2%, respectively). People with diabetes were significantly less likely to provide free-text comments than those with cancer or MS (29.0%, 35.1% and 39.9%, respectively). Four key themes were identified from qualitative analysis, which were similar across disease states: (1) having a chronic disease heightened perceived susceptibility to and perceived severity of COVID-19 (2) perceived impact of vaccination on chronic disease management and disease-related safety (3) uncertain benefits of COVID-19 vaccine and (4) overwhelming information overload disempowering patients. Conclusions: This qualitative analysis highlights an additional layer of complexity related to COVID-19 vaccination decision making in people with underlying health conditions. Appreciation of higher susceptibility to severe COVID-19 outcomes appears to be weighed against uncertain impacts of the vaccine on the progression and management of the comorbid disease. Interactions by clinicians addressing in idual factors may alleviate concerns and maximise vaccine uptake in people with significant underlying health conditions.
Publisher: Springer Science and Business Media LLC
Date: 14-08-2022
Publisher: Cold Spring Harbor Laboratory
Date: 06-04-2022
DOI: 10.1101/2022.04.06.22273080
Abstract: To examine vaccine uptake, hesitancy and explanatory factors amongst people with serious and/or chronic health conditions, including the impact of underlying disease on attitudes to vaccination. Cross-sectional survey. Ten Australian health services. 4683 patients (3560 cancer, 842 diabetes and 281 multiple sclerosis) receiving care at the health services participated in the 42-item survey, between June 30 to October 5, 2021. Sociodemographic and disease-related characteristics, COVID-19 vaccine uptake, and the scores of three validated scales which measured vaccine hesitancy and vaccine-related beliefs generally and specific to the participants’ disease, including the Oxford COVID-19 Vaccine Hesitancy Scale, the Oxford COVID-19 Vaccine Confidence and Complacency Scale and the Disease Influenced Vaccine Acceptance Scale. Multivariable logistic regression was used to determine the associations between scale scores and vaccine uptake. Of all participants, 81.5% reported having at least one COVID-19 vaccine. Unvaccinated status was associated with younger age, female sex, lower education and income, English as a second language, and residence in regional areas (all p .05). Unvaccinated participants were more likely to report greater vaccine hesitancy and more negative perceptions toward vaccines (all p .05). Disease-related vaccine concerns were associated with unvaccinated status and hesitancy, including greater complacency about COVID-19 infection, and concerns relating to vaccine efficacy and impact on their disease and/or treatment (all p .05). Disease-specific concerns impact COVID-19 vaccine-related behaviours and beliefs in people with serious and/or chronic health conditions. This highlights the need to develop targeted strategies and education about COVID-19 vaccination to support medically vulnerable populations and health professionals. ACTRN12621001467820
Publisher: MDPI AG
Date: 12-2018
DOI: 10.3747/CO.25.4208
Abstract: Background: We aimed to assess current treatment patterns and outcomes in elderly patients with localized gastric and esophageal (GE) cancers. Methods: This retrospective analysis considered patients 75 years of age or older with ge cancers treated during 2012–2014. Patient demographics and tumour characteristics were collected. Overall survival (OS) and disease-free survival were assessed by univariable and multivariable Cox proportional hazards regression, adjusting for demographics. Logistic regression analyses were used to examine factors affecting treatment choices. Results: The 110 patients in the study cohort had a median age of 81 years (range: 75–99 years). Primary disease sites were esophageal (55%) and gastric (45%). Treatment received included radiation therapy alone (29%), surgery alone (26%), surgery plus perioperative therapy (14%), chemoradiation alone (10%), and supportive care alone (14%). In multivariable analyses, surgery (hazard ratio: 0.48 95% confidence interval: 0.26 to 0.90 p = 0.02) was the only independent predictor for improved os. Patients with a good Eastern Cooperative Oncology Group performance status (p = 0.008), gastric disease site (p = 0.02), and adenocarcinoma histology (p = 0.01) were more likely to undergo surgery. Conclusions: At our institution, few patients 75 years of age and older received multimodality therapy for localized ge cancers. Outcomes were better for patients who underwent surgery than for those who did not. To ensure optimal treatment selection, comprehensive geriatric assessment should be considered for patients 75 years of age and older with localized GE cancers.
Publisher: Elsevier BV
Date: 10-2020
Publisher: Springer Science and Business Media LLC
Date: 17-07-2017
DOI: 10.1007/S12022-017-9492-5
Abstract: The objective of the study is to report a rare case of pancreatic neuroendocrine tumor (pNET) producing insulin and vasopressin. We describe the clinical presentation and management of a metastatic pNET with refractory hypoglycemia and progressive severe hyponatremia. A 52-year-old patient had abdominal pain leading to the diagnosis of a tumor that was initially presumed to be splenic in origin. Investigations ultimately identified a pancreatic mass that on biopsy proved to be a pNET. Eventually, he developed extensive liver metastases, and with tumor progression, he manifested hypoglycemia and severe hyponatremia. He was managed with multiple therapies including somatostatin analogue, peptide-receptor-radionuclide-therapy (PRRT), diazoxide, and everolimus none of these therapeutic modalities was successful in controlling functional and structural progression of the tumor. Ultimately, the pNET proved fatal and autopsy confirmed widely metastatic disease that stained strongly and diffusely for vasopressin, a feature not seen in the previous liver biopsy. This case illustrates the challenges of diagnosis and management of aggressive insulin-producing pNETs and highlights the potential concomitant ectopic production of vasopressin leading to refractory hyponatremia.
No related grants have been discovered for Bryan Anthony Chan.