Publications by authors named "Henry M Marshall"

Background: Peripheral pulmonary lesions (PPLs) are frequently identified and require diagnostic sampling. Diagnostic yield of radial endobronchial ultrasound (rEBUS) guided bronchoscopic biopsies is suboptimal, despite ultrasound confirmation of navigation success. Pairing ultrathin bronchoscopy and peripheral transbronchial needle aspiration (pTBNA) may improve yield.

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Lung cancer screening can reduce the mortality of lung cancer, the leading cause of cancer death worldwide. Real world screening experience highlights areas for improvement in a complex and changing world, particularly ethnic disparity, and the potential for new and emerging risk factors, in addition to well known risk of smoking and asbestos exposure. Biomarkers offer the promise of objective risk assessment but are not yet ready for clinical practice.

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Introduction: Lung cancer screening (LCS) trials, targeting people with smoking history, have demonstrated reduced mortality. How to optimally embed evidence-based smoking cessation support in LCS, including in Australia, needs to be better understood. We sought experts' perspectives to identify potential barriers and effective implementation strategies.

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Motivational interviewing (MI) is a common approach for smoking cessation counselling, yet little is known about the use of MI techniques in practice. This qualitative content analysis applied a published classification of content and relational MI techniques to a sample of 30 Quitline transcripts (January-March 2019) from Queensland, Australia. Overall, 36 MI techniques (94.

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Background: Our prototype smoking cessation chatbot, Quin, provides evidence-based, personalized support delivered via a smartphone app to help people quit smoking. We developed Quin using a multiphase program of co-design research, part of which included focus group evaluation of Quin among stakeholders prior to clinical testing.

Objective: This study aimed to gather and compare feedback on the user experience of the Quin prototype from end users and smoking cessation professionals (SCPs) via a beta testing process to inform ongoing chatbot iterations and refinements.

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Objective: This scoping review synthesises Australian evidence on associations between tobacco and vape retailer density/proximity and various population measures and smoking behaviour to identify research gaps and inform future policy and strategies.

Data Sources: Following Joanna Briggs Institute methodology, relevant studies published in English since 2003 were identified via searches of eight databases in March and August 2023.

Study Selection: Two reviewers independently completed screening procedures.

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Introduction: Physical activity (PA) is a potentially modifiable risk factor for lung cancer, with previous research revealing that people who engage in more PA have lower risk of developing lung cancer. PA levels of lung cancer screening participants have not previously been explored.

Methods: Participants at a single Australian International Lung Screen Trial site were eligible for assessment of self-reported PA levels (International Physical Activity Questionnaire and Physical Activity Scale for the Elderly) and physical assessments (6-min walk distance, hand grip muscle strength, daily step count, and body composition) at a single time point during lung cancer screening.

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Background: Evaluation of psychosocial consequences of lung cancer screening with LDCT in high-risk populations has generally been performed using generic psychometric instruments. Such generic instruments have low coverage and low power to detect screening impacts. This study aims to validate an established lung cancer screening-specific questionnaire, Consequences Of Screening Lung Cancer (COS-LC), in Australian-English and describe early results from the baseline LDCT round of the International Lung Screen Trial (ILST).

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Background And Objective: Lung cancer is the leading cause of cancer-related mortality worldwide, partially attributed to late-stage diagnoses. In order to mitigate this, lung cancer screening (LCS) of high-risk patients is performed using low dose computed tomography (CT) scans, however this method is burdened by high false-positive rates and radiation exposure for patients. Further, screening programs focus on individuals with heavy smoking histories, and as such, never-smokers who may otherwise be at risk of lung cancer are often overlooked.

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Introduction: Chatbots emulate human-like interactions and may usefully provide on-demand access to tailored smoking cessation support. We have developed a prototype smartphone application-based smoking cessation chatbot, named Quin, grounded in real-world, evidence-, and theory-based smoking cessation counseling sessions.

Methods: Conversation topics and interactions in Quitline counseling sessions (N = 30; 18 h) were characterized using thematic, content, and proponent analyses of transcripts.

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Background: Conversational artificial intelligence (chatbots and dialogue systems) is an emerging tool for tobacco cessation that has the potential to emulate personalised human support and increase engagement. We aimed to determine the effect of conversational artificial intelligence interventions with or without standard tobacco cessation interventions on tobacco cessation outcomes among adults who smoke, compared to no intervention, placebo intervention or an active comparator.

Methods: A comprehensive search of six databases was completed in June 2022.

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Telephone-based services are a practical and effective behavioral support for smoking cessation, yet no in-depth analyses of this counseling have been conducted. Understanding the general content of Quitline conversations can help to improve current practices and may inform future interventions. Therefore, we aimed to independently explore conversation themes, topics, and client questions during Quitline counseling sessions with Quitline clients in Queensland, Australia.

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Objectives: Compare accuracy of vertebral Hounsfield Unit (VHU) attenuation and FRAX and Garvan Fracture Risk Calculators in identifying low bone mineral density (BMD) and prevalent vertebral compression fractures (VF) in lung cancer screening (LCS) participants.

Methods: Baseline CT scans from a single site of the International Lung Screen Trial were analysed. BMD was measured using VHU (of the most caudally imaged vertebra) and quantitative CT (QCT) (low BMD defined as <110 HU and <120 mg/cm respectively).

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Background: Lung cancer is the number one cause of cancer death worldwide. Although international trials demonstrate that targeted screening using low dose computed tomography (LDCT) significantly reduces lung cancer mortality, implementation of screening in the high-risk population presents complex health system challenges that need to be thoroughly understood to support policy change.

Aim: To elicit health care providers' and policymakers' views about the acceptability and feasibility of lung cancer screening (LCS) and barriers and enablers to implementation in the Australian setting.

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Objectives: Using risk models as eligibility criteria for lung screening can reduce race and sex-based disparities. We used data from the International Lung Screening Trial(ILST; NCT02871856) to compare the economic impact of using the PLCOm2012 risk model or the US Preventative Services' categorical age-smoking history-based criteria (USPSTF-2013).

Materials And Methods: The cost-effectiveness of using PLCOm2012 versus USPSTF-2013 was evaluated with a decision analytic model based on the ILST and other screening trials.

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Background: Smoking cessation is an important screening component, but the evidence base to inform implementation is lacking. We report longitudinal smoking behavior in an Australian screening cohort and examine predictor variables associated with continued smoking.

Methods: Healthy current or former smokers (quit less than 15 years and ≥30-pack year smoking history) aged 60-74 years underwent CT screening at baseline, year 1 and year 2.

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Introduction: Participation in lung cancer screening (LCS) trials and real-world programs is low, with many people at high-risk for lung cancer opting out of baseline screening after registering interest. We aimed to identify the potential drivers of participation in LCS in the Australian setting, to inform future implementation.

Methods: Semi-structured telephone interviews were conducted with individuals at high-risk of lung cancer who were eligible for screening and who had either participated ('screeners') or declined to participate ('decliners') in the International Lung Screening Trial from two Australian sites.

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Background: Lung cancer is the most common cause of cancer-related death in the world, however lung cancer screening has not been implemented in most countries at a population level. A previous Cochrane Review found limited evidence for the effectiveness of lung cancer screening with chest radiography (CXR) or sputum cytology in reducing lung cancer-related mortality, however there has been increasing evidence supporting screening with low-dose computed tomography (LDCT).  OBJECTIVES: To determine whether screening for lung cancer using LDCT of the chest reduces lung cancer-related mortality and to evaluate the possible harms of LDCT screening.

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Low-dose computed tomography lung cancer screening has mortality benefits. Yet, uptake has been low. To inform strategies to better deliver and promote screening, in 2018, we interviewed 27 long-term smokers immediately following lung cancer screening in Australia, prior to receiving scan results.

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Tobacco control policies reinforce a health imperative that positions citizens as duty-bound to manage their health by abstaining from or quitting smoking. Limited attention is paid to the repercussions - especially for lung screening - of anti-smoking rhetoric emphasising individual responsibility. Drawing on interviews with 27 long-term smokers involved in an international lung screening trial, this study analysed Australian smokers' narratives of smoking.

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