Michael O’Kelly

Missing data in clinical trials: from clinical assumptions to statistical analysis using pattern mixture models

Bohdana Ratitch, Michael O’Kelly, Robert Tosiello · Pharmaceutical Statistics · 2013 · 145 citations

Quantitative Methods, Justified Methodology, Population Health Sciences +20

Choosing Estimands in Clinical Trials: Putting the ICH E9(R1) Into Practice

Bohdana Ratitch, James Bell, Craig Mallinckrodt et al. · Therapeutic Innovation & Regulatory Science · 2020 · 73 citations

Patient Selection, Clinical Endpoint, Clinical Evidence +7

Aligning Estimators With Estimands in Clinical Trials: Putting the ICH E9(R1) Guidelines Into Practice

Craig Mallinckrodt, James Bell, G. Liu et al. · Therapeutic Innovation & Regulatory Science · 2020 · 65 citations

Meta-analysis, Clinical Endpoint, Clinical Epidemiology +10

Sensitivity to censored‐at‐random assumption in the analysis of time‐to‐event endpoints

Ilya Lipkovich, Bohdana Ratitch, Michael O’Kelly · Pharmaceutical Statistics · 2016 · 46 citations

Engineering, Rare Event Estimation, Treatment Effect +17

Missing Data: Turning Guidance Into Action

Craig Mallinckrodt, James Roger, Christy Chuang‐Stein et al. · Statistics in Biopharmaceutical Research · 2013 · 45 citations