N Klar

Summary

Affiliation: Cancer Care Ontario
Country: Canada

Publications

  1. ncbi request reprint Current and future challenges in the design and analysis of cluster randomization trials
    N Klar
    Division of Preventive Oncology, Cancer Care Ontario, Toronto, Ontario, M5G 2L7, Canada
    Stat Med 20:3729-40. 2001
  2. ncbi request reprint Methods for modelling change in cluster randomization trials
    Neil Klar
    Division of Preventive Oncology, Cancer Care Ontario, Toronto, Ontario, Canada M5G 2L7
    Stat Med 23:2341-57. 2004
  3. ncbi request reprint Breast screening outcomes in women with and without a family history of breast and/or ovarian cancer
    E E Halapy
    Division of Preventive Oncology, Cancer Care Ontario, 620 University Avenue, Toronto, ON M5G 2L7, Canada
    J Med Screen 11:32-8. 2004
  4. ncbi request reprint Accounting for expected attrition in the planning of community intervention trials
    Monica Taljaard
    Ottawa Health Research Institute, Clinical Epidemiology Program, The Ottawa Hospital, Ottawa, Canada
    Stat Med 26:2615-28. 2007
  5. ncbi request reprint Colorectal screening is associated with reduced colorectal cancer risk: a case-control study within the population-based Ontario Familial Colorectal Cancer Registry
    Michelle Cotterchio
    Division of Preventive Oncology, Cancer Care Ontario, 620 University Avenue, M5G 2L7, Ontario, Toronto, Canada
    Cancer Causes Control 16:865-75. 2005
  6. ncbi request reprint Comparison of papanicolaou (Pap) test rates across Ontario and factors associated with cervical screening
    Gordon Fehringer
    Division of Preventive Oncology, Cancer Care Ontario, Toronto, ON
    Can J Public Health 96:140-4. 2005
  7. ncbi request reprint Accuracy of breast screening among women with and without a family history of breast and/or ovarian cancer
    Erika Halapy
    Division of Preventive Oncology, Cancer Care Ontario, 620 University Avenue, Toronto, Ontario M5G 2L7, Canada
    Breast Cancer Res Treat 90:299-305. 2005
  8. ncbi request reprint Accuracy of cancer family histories: comparison of two breast cancer syndromes
    Katherine A Schneider
    Population Sciences, Dana Farber Cancer Institute, Boston, MA 02115, USA
    Genet Test 8:222-8. 2004
  9. ncbi request reprint Methods for the statistical analysis of binary data in split-cluster designs
    Allan Donner
    Department of Epidemiology and Biostatistics, University of Western Ontario, London, Ontario N6A 5C1, Canada
    Biometrics 60:919-25. 2004
  10. ncbi request reprint Antidepressant medication use and non-Hodgkin's lymphoma risk: no association
    Saira Bahl
    Division of Preventive Oncology, Cancer Care Ontario, Toronto, Ontario, Canada
    Am J Epidemiol 160:566-75. 2004

Collaborators

Detail Information

Publications20

  1. ncbi request reprint Current and future challenges in the design and analysis of cluster randomization trials
    N Klar
    Division of Preventive Oncology, Cancer Care Ontario, Toronto, Ontario, M5G 2L7, Canada
    Stat Med 20:3729-40. 2001
    ..Brief mention is also made of issues related to economic analysis and to the planning and conduct of meta-analyses for cluster randomization trials. Recommendations for reporting are also discussed...
  2. ncbi request reprint Methods for modelling change in cluster randomization trials
    Neil Klar
    Division of Preventive Oncology, Cancer Care Ontario, Toronto, Ontario, Canada M5G 2L7
    Stat Med 23:2341-57. 2004
    ..The discussion is illustrated using data from a school-based smoking prevention trial...
  3. ncbi request reprint Breast screening outcomes in women with and without a family history of breast and/or ovarian cancer
    E E Halapy
    Division of Preventive Oncology, Cancer Care Ontario, 620 University Avenue, Toronto, ON M5G 2L7, Canada
    J Med Screen 11:32-8. 2004
    ..To compare breast screening outcomes between women with a moderate or strong family history of breast and/or ovarian cancer with those without such a history...
  4. ncbi request reprint Accounting for expected attrition in the planning of community intervention trials
    Monica Taljaard
    Ottawa Health Research Institute, Clinical Epidemiology Program, The Ottawa Hospital, Ottawa, Canada
    Stat Med 26:2615-28. 2007
    ..To aid in the planning of future trials, we recommend that estimates for tau be reported in published community intervention trials...
  5. ncbi request reprint Colorectal screening is associated with reduced colorectal cancer risk: a case-control study within the population-based Ontario Familial Colorectal Cancer Registry
    Michelle Cotterchio
    Division of Preventive Oncology, Cancer Care Ontario, 620 University Avenue, M5G 2L7, Ontario, Toronto, Canada
    Cancer Causes Control 16:865-75. 2005
    ..This is the first study to evaluate the association between colonic screening and colorectal cancer risk among Canadians...
  6. ncbi request reprint Comparison of papanicolaou (Pap) test rates across Ontario and factors associated with cervical screening
    Gordon Fehringer
    Division of Preventive Oncology, Cancer Care Ontario, Toronto, ON
    Can J Public Health 96:140-4. 2005
    ....
  7. ncbi request reprint Accuracy of breast screening among women with and without a family history of breast and/or ovarian cancer
    Erika Halapy
    Division of Preventive Oncology, Cancer Care Ontario, 620 University Avenue, Toronto, Ontario M5G 2L7, Canada
    Breast Cancer Res Treat 90:299-305. 2005
    ..To compare interval cancer rates, sensitivity and specificity of breast cancer screening between women with moderate or strong family history and women without a family history...
  8. ncbi request reprint Accuracy of cancer family histories: comparison of two breast cancer syndromes
    Katherine A Schneider
    Population Sciences, Dana Farber Cancer Institute, Boston, MA 02115, USA
    Genet Test 8:222-8. 2004
    ..Our data suggest that it may not be necessary to confirm breast cancer diagnoses routinely; however, documentation of other cancer types remains important for appropriate risk assessment and follow-up...
  9. ncbi request reprint Methods for the statistical analysis of binary data in split-cluster designs
    Allan Donner
    Department of Epidemiology and Biostatistics, University of Western Ontario, London, Ontario N6A 5C1, Canada
    Biometrics 60:919-25. 2004
    ....
  10. ncbi request reprint Antidepressant medication use and non-Hodgkin's lymphoma risk: no association
    Saira Bahl
    Division of Preventive Oncology, Cancer Care Ontario, Toronto, Ontario, Canada
    Am J Epidemiol 160:566-75. 2004
    ..These findings do not support an increased risk of non-Hodgkin's lymphoma with antidepressant medication use...
  11. pmc Pitfalls of and controversies in cluster randomization trials
    Allan Donner
    Department of Epidemiology and Biostatistics, University of Western Ontario, London, Canada
    Am J Public Health 94:416-22. 2004
    ..We discuss several topics related to these issues, with emphasis on the choices that must be made in the planning stages of a trial and on some potential pitfalls to be avoided...
  12. ncbi request reprint Sample size re-estimation in cluster randomization trials
    Stephen Lake
    Department of Biostatistics, Harvard School of Public Health, 655 Huntington Avenue, Boston, MA 02115, USA
    Stat Med 21:1337-50. 2002
    ..The effect of this design on the power, significance level and sample size is analysed via simulation and is shown to provide a flexible and practical approach to cluster randomization trials...
  13. ncbi request reprint The merits of breaking the matches: a cautionary tale
    Allan Donner
    Department of Epidemiology and Biostatistics, Schulich School of Medicine, University of Western Ontario, London, Canada
    Stat Med 26:2036-51. 2007
    ....
  14. ncbi request reprint Group sequential methods for cluster randomization trials with binary outcomes
    Guang Yong Zou
    Department of Epidemiology and Biostatistics, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada
    Clin Trials 2:479-87. 2005
    ....
  15. pmc A blended knowledge translation initiative to improve colorectal cancer staging [ISRCTN56824239]
    Frances C Wright
    Sunnybrook and Women s College Health Sciences Centre, University of Toronto, Toronto, ON, M4N 3M5, Canada
    BMC Health Serv Res 6:4. 2006
    ....
  16. ncbi request reprint A non-iterative confidence interval estimating procedure for the intraclass kappa statistic with multinomial outcomes
    Guangyong Zou
    Robarts Clinical Trials, Robarts Research Institute, 100 Perth Drive, London, Ontario, Canada N6A 5K8
    Biom J 47:682-90. 2005
    ..The procedure is illustrated with two examples from previously published medical studies...
  17. ncbi request reprint Issues in the meta-analysis of cluster randomized trials
    Allan Donner
    Department of Epidemiology and Biostatistics, The University of Western Ontario, London, Ontario, N6A 5C1, Canada
    Stat Med 21:2971-80. 2002
    ..In this paper we review and comment on a selected number of these issues, including problems of study heterogeneity, difficulties in estimating design effects from individual trials and the choice of statistical methods...
  18. ncbi request reprint Predictors of self-reported confidence ratings for adult recall of early life sun exposure
    Anne Sharon Relova
    Division of Preventive Oncology, Cancer Care Ontario, Toronto, Ontario, Canada
    Am J Epidemiol 162:183-92. 2005
    ..91; 12-18 years: odds ratio = 1.32), which suggests an absence of recall bias for reported time spent outdoors...
  19. ncbi request reprint A population-based study of Ashkenazi Jewish women's attitudes toward genetic discrimination and BRCA1/2 testing
    Lisa Soleymani Lehmann
    Massachusetts General Hospital, General Medicine Division, currently at Brigham and Women s Hospital, Division of General Medicine and Harvard Medical School, Division of Medical Ethics, Boston, Massachusetts 02115, USA
    Genet Med 4:346-52. 2002
    ..In particular, we assessed concerns about group discrimination, perceptions of the advantages and disadvantages of testing, and the relationship between concerns about discrimination and the potential benefits of genetic testing...
  20. doi request reprint Imputation strategies for missing continuous outcomes in cluster randomized trials
    Monica Taljaard
    Ottawa Health Research Institute, Clinical Epidemiology Program, Ottawa Hospital, 1053 Carling Avenue, Ottawa, Ontario, Canada
    Biom J 50:329-45. 2008
    ..Within-cluster multiple imputation is shown to be the least powerful among the procedures considered...