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Abstract
6628 Background: Over use of routine surveillance imaging to detect recurrence in women with EBC was recently identified as one of the top five opportunities to improve the quality of cancer care by the American Society of Clinical Oncology. We undertook a population level assessment of the current practice of surveillance imaging in EBC women treated in Ontario Canada. Methods: Incident early breast cancer patients diagnosed 01/07 – 12/09 in Ontario, Canada were identified from the Ontario Cancer Registry. Patient records were linked deterministically to provincial health care databases to provide comprehensive medical follow-up. Basic (chest x-ray, abdominal x-ray and abdominal ultrasound) and advanced (computed tomography [CT] or bone scans) surveillance imaging scans completed during the first and second year of follow-up care (starting 6 months after surgery or upon completion of adjuvant chemotherapy) were identified. Logistic regression models were used to identify covariates associated with advanced surveillance imaging. Results: 16,981 EBC patients were included in the analysis of which 7,907(46.6%) received chemotherapy. In the first year of follow up care, 8,311 (48.9%) had at least 1 basic imaging test, while 4,916 (29.0%) had advanced imaging. This fell to 45.7% (basic) and 25.1% (advanced) in the second year of follow-up. Bone scans were the most common advanced imaging test (14.5%), followed by CT thorax (10.8%). On multivariable analysis age, stage, the use of chemotherapy and comorbidity were associated with increased use of advanced surveillance imaging (Table). Significant geographic variation was also demonstrated. Conclusions: Surveillance imaging was common in the first two years of follow-up for EBC patients. While appropriate for symptom driven investigation, attention should be paid to the routine use of surveillance imaging in EBC women during follow-up care. [Table: see text]
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