Quantitative Methods 2017

Prospective cohort study • Advantages: – Better control inclusion and exclusion criteria – Predefined and consistent definitions of candidate predictors – Predefined and consistent assessment of endpoints: • Fixed time points including baseline assessment • Additional guidelines/training for “difficult” assessments • Additional diagnostic procedures – Predefined guidelines for radiotherapy: • e.g. OAR delineation / fractionation / treatment planning – Permits quality assurance programs