Fig. 2From: Validation and investigation of cross cultural equivalence of the Fremantle back awareness questionnaire - German version (FreBAQ-G)Test characteristic curve; y-axis: expected sum-score; x-axis = estimated Theta values, with a mean = 0 and a SD = 1, 95% of all patients with NSLBP have a Theta value between − 1.96 to 1.96 or between 0.984 to 20.7 in the FreBAQ sum-scoreBack to article page