Stettbachstrasse 6
8600 Dübend​orf​
Phone: +41 44 200 24 20
Fax:     +41 44 200 24 60

AOCID Resources

Useful resources to help you conduct clinical research.​

Classification Tool

The AO COIAC (Comprehensive Injury Automatic Classifier) is a PC-based software developed at AO Clinical Investigation and Documentation for AOTrauma​ and AOCMF​ in the context of the activities of the AO Classification Advisory Group. AO COIAC helps surgeons learn and use AO classification systems for clinical diagnosis and simple local case documentation. The current version includes the Müller AO Classification of Fractures – Long Bones for adults, the AO pediatric long bone classification system, as well as a newly developed AO craniomaxillofacial system for injury location. More than 5,000 downloads demonstrate the worldwide interest in the AO COIAC as a software solution. More...​



The Clinical Research Casino – Statistical concepts found in gambling and clinical studies.
Presented by Beate Hanson, AOCID Director. Running time 62 minutes.


Evidence-based practice in the operating room.
Lecture to ORP by Beate Hanson, AOCID Director. Running time 23 minutes.




The TEFTOM (Trauma Expectation Factor / Trauma Outcome Measure) tools will assist you in identifying patient expectations prior to surgery, and measuring how successful you were in fulfilling them post-surgery.


TEF Questionnaire​​​

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​TOM Questionnaire​

​​​​​​​​​​​Free online sample size calculator​




Clinical Research

Freely downloadable texts of the 2006 and 2011 editions of the book Testing Treatments, together with reviews and translations of the first edition, are available at

Oxford Centre for Evidence-Based Medicine. Great resources like critical appraisal checklists.


European Parliament and Council Directive on medical devices
European Parliament and Council DIRECTIVE 2007/47/EC​


Uniform Requirements for Manuscripts Submitted to Biomedical Journals
International Committee of Medical Journal Editors
Citations for biomedical literature from MEDLINE, life science journals, and online books.
The Cochrane Library
Independent high-quality evidence for health care decision making


Handbook – Statistics and Data Management
A Practical Guide for Orthopedic Surgeons. Sample chapter: How to analyze your data
Basics of Medical Statistics. A web-based course in medical statistics designed for students of medicine and those working in the medical professions. In English, French and German. Free registration.
Stata – Data Analysis and Statistical Software
Convenient web-based courses for learning Stata.

Electronic Data Capture

REDCap – Research Electronic Data Capture
A secure web application which supports electronic data capture for research studies.