Stefan is a Chartered Psychologist and Associate Fellow of the British Psychological Society. He has 26 years’ experience in patient centred outcome measure (PCOM) development and psychometric research across a range of clinical and surgical disciplines. Stefan’s main area of interest is in developing, applying, and improving mixed methods psychometric research in clinical studies and therapeutic trials. He is especially interested in maximizing the interpretability of existing and new PCOMs.
Stefan has published 180+ articles in PCO measurement in peer review journals (H-Index 56). He is also co-developer of Q-Portfolio (https:// http://qportfolio.org/) patient reported outcome (PRO) measures (including BREAST-Q©, FACE-Q©, BODY-Q©, and CLEFT-Q©), which have been used widely in clinical research, clinical trials, clinical practice, quality improvement initiatives, clinical guidance, national registries, and national audit.