Background and aims: 
Kinesiophobia is associated with the degree of disability in patients. Tampa Scale of Kinesiophobia (TSK), which has recently been translated into Danish, is a valid and reliable tool for identifying kinesiophobic beliefs. The aims of this study were to investigate test-retest reliability for both the continuous and dichotomous scale at different cut-offs for the TSK-17, TSK-13 and TSK-11 versions, as well as measurement error. 

Methods: 
Twice, 77 patients with severe chronic pain referred to multidisciplinary pain treatment completed the TSK-17 at home. Mean interval 8.4 ±1.9 days. Intraclass Correlation Coefficient (ICC2,1), Standard Error of Measurement (SEM), Smallest Detectable Change (SDC95%) as well as reliability (% stable) and measurement error (Kappa-values) between classification into high and low TSK scores were calculated.
Results: For test-retest reliability, ICC2,1 were 0.86 (CI:0.79–0.91), 0.88 (0.82–0.92) and 0.87 (0.81–0.92) for TSK-17, TSK-13 and TSK-11, respectively. For TSK-17, TSK-13 and TSK-11, SEM-values were 3.1, 2.4 and 2.1 and SDC95% were 8.5, 6.7 and 5.8. With cut-off scores derived from the median of the population, the reliability in classification into high and low TSK between days were significant (TSK-17: 80.5% of patients, Kappa=0.61; TSK-13: 84.4% of patients, Kappa=0.69, TSK-11: 78.0% of patients, Kappa=0.54; p<0.001). Patients classified as high TSK had higher pain-related disability and were less physically active.

Conclusions: 
In patients with severe chronic pain, the Danish versions of TSK are reliable. With median derived cut-offs, all versions showed good reliability with good Kappa-values, lending evidence to the clinical relevance of these cut-offs.

01 - RELIABILITY AND DETERMINATION OF CUT-OFFS FOR THE DANISH VERSION OF THE TAMPA SCALE OF KINESIOPHOBIA (TSK) IN PATIENTS WITH SEVERE CHRONIC PAIN.