SAT0709-HPR SPINAL MOBILITY IN SPONDYLOARTHRITIS PATIENTS: DO THE BASMI-MEASUREMENTS CORRELATE WITH THE DAVID BACK DEVICES-MEASUREMENTS?

Background: The BASMI is a common used and well established index to measure spinal mobility in spondyloartritis(SpA)-patients, both in the clinic as well as for research. The David Back Devices (DBD) on the other hand, are used to measure and exercise lumbar and cervical mobility and strength in spine patients. The DBD might have the potential advance of not being operator dependent in contrast to the BASMI-measurements. Hence, the question rose if the BASMI measurements that correspond with cervical rotation and lumbar lateral flexion movements on the DBD are correlated with one another. Objectives: The aim of this study was to measure the spinal mobility in SpA-patients both by using BASMI measurements and by using the DBD and determine their relationship. Methods: SpA-patients of the outpatient rheumatology department of the Ghent University Hospital (included in the Be-Giant cohort) were consecutively asked to participate in the study. After informed consent, BASDAI, BASFI and BASMI were evaluated. To measure mobility on the DBD both trunk and cervical range of motion for flexion, extension, lateral flexion and rotation were assessed. Spearman correlation coefficients were calculated for cervical rotation and lumbar lateral flexion. Results: Thirty-one SpA-patients participated of which 18 were male (58%). Twenty-four (77%) were classified as axial SpA and 7 (23%) as peripheral SpA. Median time since diagnosis was 5 years. Mean age of the patients was 41 years (range: 21 – 58 years) and their BMI was on average 24 (range: 17-33). Averages for BASDAI, BASFI and BASMI were 2.6, 1.7 and 0.9 respectively. There was a significant positive correlation between the cervical rotation measurement obtained by BASMI and DBD (ρ=0.84 for right and ρ=0.80 for left) as well as between the lateral flexion measurement obtained by BASMI and DBD (ρ=0.72 for right and ρ=0.65 for left). Due to the sitting position during testing the lumbar flexion by DBD, the range of motion was limited when the chest touched the thighs. Therefore, correlation could not accurately be determined between the modified Schoberindex and DBD lumbar flexion. Conclusion: This study demonstrated that in SpA-patients, the BASMI measurements for cervical rotation and lumbar lateral flexion show high correlations when compared with the similar measurements on the DBD. The correlations for cervical rotation were better than those for lumbar lateral flexion. Disclosure of Interests: Sophie De Mits: None declared, Liselotte Deroo: None declared, Ann-Sophie De Craemer: None declared, Thomas Renson: None declared, Tine Willems: None declared, Lieven Danneels: None declared, Philippe Carron: None declared, Filip van den Bosch Consultant for: AbbVie, BMS, Galapagos, Janssen, Lilly, Merck, Novartis, Pfizer and UCB, Speakers bureau: AbbVie, BMS, Janssen, Lilly, Merck, Novartis, Pfizer and UCB., Dirk Elewaut: None declared