Detail Information
Publications
A comparison of four different methods for outlier detection in bioequivalence studiesTimothy Ramsay
McLaughlin Centre for Population Health Risk Assessment, Ottawa, Canada
J Biopharm Stat 15:43-52. 2005....
The effect of concurvity in generalized additive models linking mortality to ambient particulate matterTimothy O Ramsay
Health Canada, Ottawa, Canada
Epidemiology 14:18-23. 2003....
Exploring bias in a generalized additive model for spatial air pollution dataTimothy Ramsay
R Samuel McLaughlin Centre for Population Health Risk Assessment, Ottawa, Ontario, Canada
Environ Health Perspect 111:1283-8. 2003..We argue that including a nonparametric function of location in a GAM for spatial epidemiologic data can be expected to result in concurvity. As a result, we recommend caution in using the GAM to analyze this type of data...
