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Dive into the research topics where W.K. Evans is active.

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Featured researches published by W.K. Evans.


Journal of Clinical Oncology | 1988

Chemotherapy can prolong survival in patients with advanced non-small-cell lung cancer--report of a Canadian multicenter randomized trial.

E Rapp; Joseph L. Pater; A Willan; Y Cormier; Nevin Murray; W.K. Evans; D I Hodson; D A Clark; Ronald Feld; A M Arnold

The survival benefit of combination chemotherapy to patients with advanced non-small-cell carcinoma of the lung (NSCLC) is controversial. To study this question, the National Cancer Institute of Canada (NCIC) Clinical Trials Group conducted a prospective randomized trial comparing best supportive care (BSC) to two chemotherapy regimens, vindesine and cisplatin (VP), and cyclophosphamide, doxorubicin, and cisplatin (CAP). Between February 1983 and January 1986, 23 centers across Canada entered 251 patients on study. Eighteen centers participated in the three-arm schema (150 patients); centers choosing not to participate in a study with a no-chemotherapy arm followed a two-arm schema comparing VP with CAP (101 additional patients). Altogether, 233 patients were eligible. Patients had measurable or evaluable disease, with either distant metastases (82.5%) or bulky limited disease considered inoperable or unsuitable for radical radiotherapy. The treatment groups were comparable in terms of age, sex, performance status, histology, disease extent, and weight loss. The overall response rates (complete response [CR] plus partial response [PR]) on the chemotherapy arms were CAP, 15.3%, and VP, 25.3% (P = .06). Patients on the three-arm portion of the trial had a median survival of 32.6 weeks when treated with VP, 24.7 weeks with CAP, and 17 weeks with BSC. The significance of the differences in survival, adjusted for prognostic factors, is as follows: chemotherapy v BSC, P = .02; VP v BSC, P = .01; and CAP v BSC, P = .05. Toxicity on the chemotherapy arms was significant, with leukopenia of severe or greater degree occurring in 37.8% (CAP) and 40.0% (VP), severe vomiting in 12.2% (CAP) and 23.3% (VP), and severe neurotoxicity in 15.6% (VP).


Journal of Clinical Oncology | 1997

Cost of combined modality interventions for stage III non-small-cell lung cancer.

W.K. Evans; B.P. Will; Jean-Marie Berthelot; Craig C. Earle

PURPOSE To evaluate the cost-effectiveness (CE) of new combined modality strategies in patients with stage III non-small-cell lung cancer (NSCLC). METHODS Recent studies suggest that combined modality therapy confers a survival advantage for patients with stage III NSCLC. Using the Statistics Canada (Ottawa, Canada) lung cancer costing model, we have evaluated the CE of these interventions using 1993 Canadian health care costs and the perspective of the government as payer in a universal health care system. RESULTS We estimate that the cost to treat a stage IIIa NSCLC patient with preoperative and postoperative chemotherapy would increase by


British Journal of Cancer | 1999

Cost-effectiveness of paclitaxel plus cisplatin in advanced non-small-cell lung cancer

Craig C. Earle; W.K. Evans

15,886, and a similar combined modality approach with the addition of postoperative radiotherapy would increase the cost by


Lung Cancer | 1996

The economics of lung cancer management in Canada

W.K. Evans; B.P. Will; Jean-Marie Berthelot; Michael Wolfson

22,963. Chemoradiotherapy for stage IIIb NSCLC would produce a smaller incremental cost of approximately


British Journal of Cancer | 2001

First do no harm: extending the debate on the provision of preventive tamoxifen

B.P. Will; Nobrega Km; Jean-Marie Berthelot; William M. Flanagan; Michael Wolfson; Logan Dm; W.K. Evans

8,912 per case. However, these approaches are remarkably cost-effective, with cost per life-year gained (LYG) ranging from


Lung Cancer | 1997

Phase II study of a one hour paclitaxel infusion in combination with carboplatin for advanced non-small cell lung cancer

W.K. Evans; C.C. Earle; David J. Stewart; Simone Dahrouge; Eva Tomiak; Glenwood D. Goss; Diane Logan; Rakesh Goel; S. Gertler; Hélène Dulude

3,348 to


Lung Cancer | 1998

A phase I study of gemcitabine/cisplatin/etoposide in the treatment of small-cell lung cancer

C.C. Earle; David J. Stewart; Y. Cormier; W.K. Evans; S. Gertler; C. Mihalcioiu; P.D. Walde

14,958. Administering all chemotherapy in the outpatient department would improve CE. For sensitivity analysis, we reduced the survival gain that resulted from the three interventions by 25% and 50%, and increased the hospital per diem rates by 10%, 20%, and 30%. CONCLUSION Even with the most adverse assumptions, the CE estimates were all considered acceptable for new health care technologies in Canada. Overall, it appears that neoadjuvant therapy for stage IIIa NSCLC and combined modality therapy for stage IIIb NSCLC are cost-effective. Economic considerations should not be a barrier to their adoption.


Lung Cancer | 1999

Concurrent chemotherapy with hyperfractionated accelerated thoracic irradiation in stage III non-small cell lung cancer

Catherine Lochrin; Glenwood D. Goss; David J. Stewart; P. Cross; Olusegun Agboola; Simone Dahrouge; Eva Tomiak; W.K. Evans

SummaryThe aim of this study was to assess the cost-effectiveness of combination chemotherapy with paclitaxel/cisplatin, compared with standard etoposide/cisplatin in patients with advanced non-small cell lung cancer (NSCLC). We obtained the primary survival and resource utilization data from a large three-arm randomized trial comparing: paclitaxel 135 mg m–2 by 24-h intravenous (i.v.) infusion + cisplatin; paclitaxel 250 mg m–2 by 24-h i.v. infusion + cisplatin + granulocyte colony-stimulating factor (G-CSF); and standard etoposide/cisplatin in patients with stage IIIb or IV NSCLC. We also modelled the regimens with paclitaxel 135 mg m–2 + cisplatin administered as an outpatient by 3-h infusion, as clinical data suggest that this is equivalent to 24-h infusion. We collected costing data from the Ottawa Regional Cancer Centre and applied it to the resources consumed in the randomized trial. We integrated these data into the Statistics Canada POpulation HEalth Model (POHEM), which generated hypothetical cohorts of patients treated with each regimen. The POHEM model assigned diagnostic work-up, treatment, disease progression and survival characteristics to each individual in these cohorts and tabulated the costs associated with each. We did sensitivity analyses around the costs of chemotherapy and its administration, and the survival differences between the two regimens. All costs are in 1997 Canadian dollars (


Seminars in Oncology | 1997

Phase II trial of gemcitabine and weekly cisplatin for advanced non-small cell lung cancer

Frances A. Shepherd; Y Cormier; R Burkes; W.K. Evans; G Goss; P Klimo; R Feld; M Taylor

1.00 Canadian ~ £0.39 sterling). The perspective is that of the Canadian health care system. In the trial, the two paclitaxel-containing arms had almost identical survival curves with a median survival of 9.7 months compared with 7.4 months for etoposide/cisplatin. As administered in the trial, paclitaxel/cisplatin cost


Seminars in Oncology | 1997

Cost-effectiveness of gemcitabine in stage IV non-small cell lung cancer: an estimate using the Population Health Model lung cancer module.

W.K. Evans

76 370 per life-year gained (LYG) and paclitaxel/cisplatin/G-CSF

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Eva Tomiak

Children's Hospital of Eastern Ontario

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Craig C. Earle

Ontario Institute for Cancer Research

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