Shamila Kamalanathan

University Health Network, Toronto, Ontario, Canada

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Publications (2)7.3 Total impact

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    ABSTRACT: To explore physician recommendations regarding radioiodine remnant ablation (RRA) as adjuvant treatment in early-stage well-differentiated thyroid carcinoma (WDTC), their rationale for administration of RRA, and their willingness to involve patients' opinions in decision making about the use of RRA. We surveyed a representative sample of specialty physicians in Canada and the United States and asked survey participants whether they would recommend adjuvant RRA after thyroidectomy for a 1.6-cm papillary thyroid carcinoma (Likert scale of agreement responses from 1 to 7; strong agreement >or=6). Factor analysis was performed to explore the rationale for recommendations. We asked whether physicians accepted the role of patients' preferences in decision making about administration of RRA, and backward conditional logistic regression analysis was used to identify predictors of strong acceptance. The effective response rate for the survey was 56.3% (486 of 864), with 62.8% (295 of 470 respondents) strongly recommending RRA. Strong RRA recommendations were founded in opinions that RRA (1) decreases WDTC-related mortality and recurrence and (2) facilitates WDTC follow-up at low risk of adverse effects. Approximately a third of the survey respondents (152 of 474) strongly agreed with incorporation of patients' preferences in decision making regarding the use of RRA. Physicians without firm convictions about the efficacy of RRA in decreasing disease-related outcomes and those practicing in the United States were most likely to indicate strong support for incorporating patients' preferences in decision making about RRA. The recommendations of physicians regarding use of adjuvant RRA are founded in beliefs in intervention efficacy and follow-up practices. Physicians in medical practice in the United States and those without strong convictions about RRA efficacy are most likely to incorporate patients' views in individualizing decisions about RRA therapy.
    No preview · Article · Mar 2008 · Endocrine Practice
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    ABSTRACT: To identify regional differences in recommendations for radioactive iodine remnant ablation (RRA) in early stage well-differentiated thyroid carcinoma (WDTC) within Canada and the United States. A cross-sectional written survey of a sample of physicians in specialties potentially involved in thyroid cancer care was performed in 2006. Participants were asked if they recommended RRA for a hypothetical 38-year-old woman with a solitary, 1.6-cm papillary carcinoma resected by total thyroidectomy. Exploratory regional comparisons were performed using Student t tests or analysis of variance. The regions studied were western Canada, eastern Canada (Ontario, the Maritimes), Quebec, the northeastern United States, the western and midwestern United States, and the southern United States. In a secondary multivariable logistic regression analysis, we explored potential relationships between individual respondent characteristics RRA recommendations. Agreement with case-based RRA recommendations was measured on a Likert scale of 1 to 7 (7 = strongest agreement). The effective response rate was 56.3% (486/864). There were significant differences in RRA recommendations among the regions studied (F = 11.99, 5 df, p < 0.001); national boundaries did not explain regional variations. For the sample case, the strongest support for RRA was in Quebec and the southern United States, intermediate support in eastern Canada and the northeastern United States, and the least support in western Canada and the western and midwestern United States. Academic affiliation and surgical specialty were independently inversely associated with strong RRA recommendations. There are significant regional differences in physician-based RRA recommendations in early stage WDTC within Canada and the United States. Physician specialty and practice characteristics may influence RRA recommendations.
    Full-text · Article · Dec 2007 · Thyroid

Publication Stats

21 Citations
7.30 Total Impact Points

Top Journals


  • 2007-2008
    • University Health Network
      • Department of Medicine
      Toronto, Ontario, Canada