Convergent construct validity: Spearmans rank correlation coefficients.

<p>STarT-values see Hill [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0132068#pone.0132068.ref015" target="_blank">15</a>].</p><p>* Statistically significant on level 0.05 (t-test),</p><p>** significant on level 0.01.</p><p>RSQ: reference standard questionnaire, TSK: Tampa Scale of Kinesiophobia, PCS: Pain Catastrophizing Scale, PHQ-2: Patient Health Questionnaire– 2 items version, HADS anx/depr: Hospital Anxiety and Depression Scale (anxiety/depression), RMDQ: Roland Morris Disability Questionnaire, VAS: Visual Analogue Scale.</p><p>Convergent construct validity: Spearmans rank correlation coefficients.