Friederike M.-S. Barthel

Development and validation of the Detail and Flexibility Questionnaire (DFlex) in eating disorders

Marion Roberts, Friederike M.-S. Barthel, Carolina López et al. · Eating Behaviors · 2011 · 96 citations

Psychopathology, Flexibility Questionnaire, Eating Disorders +10

Evaluation of sample size and power for multi-arm survival trials allowing for non-uniform accrual, non-proportional hazards, loss to follow-up and cross-over

Friederike M.-S. Barthel, Abdel Babiker, Patrick Royston et al. · Statistics in Medicine · 2006 · 62 citations

A Menu-driven Facility for Complex Sample Size Calculation in Randomized Controlled Trials with a Survival or a Binary Outcome: Update

Friederike M.-S. Barthel, Patrick Royston, Abdel G. Babiker · The Stata Journal Promoting communications on statistics and Stata · 2005 · 41 citations · Full text

Menu-driven Facility, Retrospective Cohort Study, Randomized Controlled Trials +14

A Menu-Driven Facility for Sample-Size Calculation in Novel Multiarm, Multistage Randomized Controlled Trials with a Time-to-Event Outcome

Friederike M.-S. Barthel, Patrick Royston, Mahesh Parmar · The Stata Journal Promoting communications on statistics and Stata · 2009 · 25 citations · Full text

Patient Selection, Clinical Endpoint, Treatment Effect +18

Graphical Representation of Interactions

Friederike M.-S. Barthel, Patrick Royston · The Stata Journal Promoting communications on statistics and Stata · 2006 · 10 citations · Full text

Interactive Visualization, Graph Theory, Visualization (Graphics) +12