____________________________________________________________________________________________ *Corresponding author: E-mail: cemkavalci@yahoo.com; Advances in Research 2(4): 225-230, 2014, Article no. AIR.2014.004 SCIENCEDOMAIN international www.sciencedomain.org The Validation of Ottawa Ankle Rules in a Prospective Study of 315 Consecutive Patients: A Prevelance Study in a Single-center Cafer Akpinar 1 , Cemil Kavalci 2* , Fevzi Yilmaz 1 , Mehmet Ali Ceyhan 1 and Muhittin Serkan Yilmaz 1 1 Numune Training and Research Hospital, Emergency Department, Ankara, Turkey. 2 Baskent University Faculty of Medicine, Emergency Department, Ankara, Turkey. Authors’ contributions Authors CA and MSY designed the study, performed the statistical analysis, wrote the protocol, and wrote the first draft of the manuscript. Authors CK and FY managed the analyses of the study. Author MAC managed the literature searche. All authors read and approved the final manuscript. Received 26 th December 2013 Accepted 1 st March 2014 Published 13 th March 2014 ABSTRACT Aim: This study was a prospective validation of the Ottawa Ankle Rules (OAR) in our patient population with ankle injury. Materials and Methods: This was a prospective study conducted. Each patient’s demographic characteristics, radiography results, and status of meeting OAR criteria were recorded on a previously prepared study form. The descriptive statistics were presented as Mean, Standard Deviation, and percentage. Categorical variables were analyzed using Chi-Square test. The correlation between OAR positivity and presence of a fracture was analyzed using the Spearman’s correlation analysis. Results: The sensitivity of OAR was 100%, specificity 27%, negative predictive value 100%, and the positive predictive value 17%. Conclusion: A careful physical examination and use of OAR may allow avoiding unnecessary tests. Keywords: Emergency; ottawa ankle rules; injury. Original Research Article