DOS 2018

210 · DOS Abstracts Acute Achilles tendon rupture - The influence of comorbidity on patient reported and functional outcome. A registry study from the Danish Achilles tendon Database. Nanna Jacobsen, Allan Cramer, Maria Swennergren Hansen, Håkon Sandholdt, Per Hölmich, Kristoffer Weisskirchner Barfod Sports Orthopedic Research Center - Copenhagen (SORC-C), Copenhagen University Hospital, Amager-Hvidovre Denmark; Physical Medicine and Rehabilitation Research – Copenhagen (PMR-C), Department of Physiotherapy and Occupational Therapy, Copenhagen University Hospital, Amager-Hvidovre Denmark; , Copenhagen University Hospital, Amager-Hvidovre Denmark; Background: Little is known concerning the influence of comorbidity on out- come after acute Achilles tendon rupture (ATR). The Danish Achilles tendon Database prospectively collects data on patients with ATR from 11 hospitals in Denmark. Purpose / Aim of Study: To investigate if comorbidity and previous Achilles tendon disorders affect patient reported and functional outcome after ATR. Materials and Methods: The study was conducted as a registry study based on data from the Danish Achilles tendon Database (DADB) in the period from April 2012 to March 2018. Outcomes were the patient reported outcome Achilles Tendon Rupture Score (ATRS) evaluated 4, 12 and 24 months after injury, and the indirect measures of tendon elongation the Achilles tendon rest- ing angle (ATRA) and heel-rise height (HRH) evaluated at 4 months. Variables of interest were diabetes, hypertension, rheumatic disease, smoking and previous Achilles tendon disorder. Stepwise multiple regression analysis with backwards elimination was performed. Findings / Results: 1060 patients with full dataset were available at 4 months, 525 at 12 months and 410 at 24 months. Hypertension was statistically sig- nificantly correlated to ATRA at 4 months, r=0.10 (p<0.01) and ATRS at 12 months, r=0.11 (p=0.02). Smoking was statistically significantly correlated to HRH at 4 months, r=0.07 (p=0.03). No other variables were correlated to the three outcomes. Conclusions: None of the chosen variables showed a convincing pattern of correlation to the three outcome variables. Smoking and hypertension might influence tendon elongation as they each correlated to one of the two indirect measurements of tendon elongation (ATRA and HRH) at 4 months. Furthermore, hypertension correlated to ATRS at 12 months. Further studies are needed to determine if smoking and hypertension are risk factors for elongation. 151.