Jina Zhang-Salomons

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BACKGROUND Associations between socioeconomic status (SES) and the incidence of cancer have been reported previously in the U.S. Canada has more comprehensive health care and social programs than the U.S. The purpose of this study was to compare the strength of associations between SES and cancer incidence in Canada and the U.S. METHODS The regions(More)
PURPOSE The objectives of this study were as follows: (1) to compare the magnitude of the association between socioeconomic status (SES) and cancer survival in the Canadian province of Ontario with that in the United States (U.S.), and (2) to compare cancer survival in communities with similar SES in Ontario and in the U.S. METHODS The Ontario Cancer(More)
PURPOSE To describe the adoption of concurrent cisplatin-based chemoradiotherapy (C-CRT), and to evaluate its impact on the outcome of cervical cancer in Ontario. METHODS We used a population-based cancer registry to identify the 4,069 patients with invasive carcinoma of the cervix diagnosed in Ontario between 1992 and 2001. We linked electronic records(More)
PURPOSE To describe the use of palliative radiotherapy (PRT) for bone metastases in Ontario between 1984 and 2001 and identify factors associated with the choice of fractionation. METHODS AND MATERIALS Electronic RT records from the nine provincial RT centers in Ontario were linked to the Ontario Cancer Registry to identify all courses of PRT for bone(More)
BACKGROUND AND PURPOSE It is known that the socioeconomic status (SES) of the patient is associated with cancer survival in the United States. The purpose of this study was to determine whether the association between SES and survival is also present in Canada, a society with a comprehensive, universal, health insurance program. METHODS A population-based(More)
PURPOSE The purpose of this study was to assess whether: (i) radiotherapy (RT) utilization varies with age in Ontario cancer patients; (ii) age-associated differences in the use of RT (if they exist) vary with cancer site and treatment intent; (iii) the age-associated variation in RT utilization is comparable to the decline in functional status in the(More)
OBJECTIVE To describe the variation in the use of radiotherapy (RT) in women in Ontario within 1 year of diagnosis of breast cancer, from 1982 to 1991, and to identify factors associated with these variations. DESIGN Retrospective, population-based cohort study. SETTING Ontario. POPULATION All women registered by the Ontario Cancer Registry (OCR) with(More)
AIMS Determining the appropriate rate of radiotherapy is important for ensuring optimal radiotherapy utilisation and accessibility. A criterion-based benchmark (CBB) was developed for estimating the need for radiotherapy in incident breast cancer cases. Our primary objective was to compare an evidence-based estimate (Ebest) of need against the CBB. These(More)
AIMS Determining the appropriate rate of radiotherapy is important for ensuring optimal radiotherapy utilisation and accessibility. A criterion-based benchmark (CBB) approach was developed as an alternative to evidence-based methods of determining the need for radiotherapy in prostate cancer. Our primary objective was to determine the initial/lifetime CBB(More)
PURPOSE Estimates of the appropriate rate of use of radiation therapy (RT) are required for planning and monitoring access to RT. Our objective was to compare estimates of the appropriate rate of use of RT derived from mathematical models, with the rate observed in a population of patients with optimal access to RT. METHODS AND MATERIALS The rate of use(More)