Sample size guidance

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• A simple method of sample size calculation for linear and logistic regression (PDF)

• Sample size considerations for the evaluation of prognostic factors in survival analysis (PDF)

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Overviews

• Prognosis Research Strategy (PROGRESS) 2: prognostic factor research (PDF)

• Prognostic markers in cancer: the evolution of evidence from single studies to meta-analysis, and beyond (PDF)

• Evidence-Based Assessment and Application of Prognostic Markers: The Long Way from Single Studies to Meta-Analysis (PDF)

• Prognostic Factors - Confusion caused by bad quality of design, analysis and reporting of many studies (PDF)

• Prognostic Factor Studies (PDF)

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Analysis guidance

• Statistical aspects of prognostic factor studies in oncology (PDF)

• Dangers of Using “Optimal” Cutpoints in the Evaluation of Prognostic Factors (PDF)

• Dichotomizing continuous predictors in multiple regression: a bad idea (PDF)

• The use of fractional polynomials to model continuous risk variables in epidemiology (PDF)

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