Research
Efficiency of two-phase methods with focus on a planned population-based case-control study on air pollution and stroke
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* Corresponding author: Anna Oudin anna.oudin@med.lu.se
1 Department of Occupational and Environmental Medicine, Lund University Hospital, Lund, Sweden
2 Competence Centre for Clinical Research, Lund University Hospital, Lund, Sweden
Environmental Health 2007, 6:34 doi:10.1186/1476-069X-6-34
Published: 7 November 2007Additional files
Additional File 1:
Overview of two-phase methods. We provide a more detailed description of the two-phase concept and a brief history of the development of two-phase methods
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Additional File 2:
Appendix 1. A two-phase method for confounding adjustment in multiplicative models [25].
Format: RTF Size: 63KB Download file
Additional File 3:
Appendix 2. The EM method for method 3 and 4.
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