Achilles Thoma
McMaster University
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Publication
Featured researches published by Achilles Thoma.
Plastic and reconstructive surgery. Global open | 2016
Anne F. Klassen; Stefan J. Cano; Amy K. Alderman; Mark Soldin; Achilles Thoma; Sam Robson; Manraj Nirmal Kaur; Athanasios Papas; Nancy Van Laeken; Valerie H. Taylor; Andrea L. Pusic
Background: Body contouring performed for cosmetic purposes, or after weight loss, has the potential to improve body image and health-related quality of life (HRQL). The BODY-Q is a new patient-reported outcome (PRO) instrument designed to measure patient perceptions of weight loss and/or body contouring. In this article, we describe the psychometric properties of the BODY-Q scales after an international field-test. Methods: Weight loss and body contouring patients from Canada, United States, and United Kingdom were recruited between November 2013 and February 2015. Data were collected using an iPad directly into a web-based application or a questionnaire booklet. Rasch measurement theory analysis was used for item reduction and to examine reliability, validity, and ability to detect change. Results: The sample included 403 weight loss and 331 body contouring patients. Most BODY-Q items had ordered thresholds (134/138) and good item fit. Scale reliability was acceptable, ie, Person separation index >0.70 for 16 scales, Cronbach &agr; ≥0.90 for 18 of 18 scales, and Test–retest ≥0.87 for 17 of 18 scales. Appearance and HRQL scores were lower in participants with more obesity-related symptoms, higher body mass index, and more excess skin and in those pre- versus postoperative body contouring. The 134 weight loss patients who completed the BODY-Q twice, either 6 weeks (weight loss/nonsurgical body contouring program) or 6 months (bariatric program) later, improved significantly on 7 appearance and 4 HRQL scales. Conclusion: The BODY-Q is a clinically meaningful and scientifically sound patient-reported outcome instrument that can be used to measure outcomes in patients who undergo weight loss and/or body contouring.
Laryngoscope | 2012
John R. de Almeida; Allan Vescan; Patrick J. Gullane; Fred Gentili; John M. Lee; Lynne Lohfeld; Jolie Ringash; Achilles Thoma; Ian J. Witterick
Anterior and central skull base lesions and their surgical treatment (endoscopic or open approaches) can affect quality of life. A disease‐specific instrument is needed to compare quality of life for different surgical approaches.
Head and Neck-journal for The Sciences and Specialties of The Head and Neck | 2013
John R. de Almeida; Ian J. Witterick; Patrick J. Gullane; Fred Gentili; Lynne Lohfeld; Jolie Ringash; Achilles Thoma; Allan Vescan
Skull base tumors are associated with physical symptoms that vary depending on location and surgical approach.
Head and Neck-journal for The Sciences and Specialties of The Head and Neck | 2013
John R. de Almeida; Ian J. Witterick; Patrick J. Gullane; Fred Gentili; Lynne Lohfeld; Jolie Ringash; Achilles Thoma; Allan Vescan
Several quality of life (QOL) instruments exist for skull base pathology, however, there have been no attempts to appraise and systematically review these instruments.
Journal of Hand Surgery (European Volume) | 2015
Noor Alolabi; Jennifer Chuback; Sharon Grad; Achilles Thoma
PURPOSE To measure the desirable health outcome, termed utility, and the expected quality-adjusted life years (QALYs) gained with hand composite tissue allotransplantation (CTA) using hand amputee patients and the general public. METHODS Using the standard gamble (SG) and time trade-off (TTO) techniques, utilities were obtained from 30 general public participants and 12 amputee patients. The health utility and net QALYs gained or lost with transplantation were computed. A sensitivity analysis was conducted to account for the effects of lifelong immunosuppression on the life expectancy of transplant recipients. Higher scores represent greater utility. RESULTS Hand amputation mean health utility as measured by the SG and TTO methods, respectively, was 0.72 and 0.80 for the general public and 0.69 and 0.70 for hand amputees. In comparison, hand CTA mean health utility was 0.74 and 0.82 for the general public and 0.83 and 0.86 for amputees. Hand CTA imparted an expected gain of 0.9 QALYs (SG and TTO) in the general public and 7.0 (TTO) and 7.8 (SG) QALYs in hand amputees. A loss of at least 1.7 QALYs was demonstrated when decreasing the life expectancy in the sensitivity analysis in the hand amputee group. CONCLUSIONS Hand amputee patients did not show a preference toward hand CTA with its inherent risks. With this procedure being increasingly adopted worldwide, the benefits must be carefully weighed against the risks of lifelong immunosuppressive therapy. This study does not show clear benefit to advocate hand CTA.
Plast Surg (Oakv) | 2017
Kevin Cheung; Manraj Nirmal Kaur; Tyson Tolliver; Christopher J. Longo; Nash H. Naam; Achilles Thoma
Purpose: Canadian health care is often criticized for extended wait times, whereas the United States suffers from increased costs. The purpose of this pilot study was to determine the cost-utility of open carpal tunnel release in Canada versus the United States. Methods: A prospective cohort study evaluated patients undergoing open carpal tunnel release at an institution in Canada and the United States. All costs from a societal perspective were captured. Utility was measured using validated health-related quality of life (HRQOL) scales—the EuroQol-5D and the Michigan Hand Outcome Questionnaire. Results: Twenty-one patients at the Canadian site and 8 patients at the US site participated. Mean total costs were US
Plastic and reconstructive surgery. Global open | 2014
Vivek Panchapakesan; Toni Zhong; Andrea L. Pusic; Achilles Thoma
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Canadian Journal of Plastic Surgery | 2008
Achilles Thoma; Leigh A. Jansen; Sheila Sprague; P Stat Ed
1965 and
Aesthetic Surgery Journal | 2013
Stephanie Byun; Ilya Mukovozov; Forough Farrokhyar; Achilles Thoma
2179 (range:
Canadian Journal of Surgery | 2015
Daniel Waltho; Manraj Nirmal Kaur; Haynes Rb; Forough Farrokhyar; Achilles Thoma
1421-