Table S1.

Properties of variables and test

Variable	Characteristic	Properties
NRS – Numerical Rating Scale	Pain intensity	0–10 – higher number = higher pain intensity
MQS – Medication Quantification Scale	Consumption of analgesics and coanalgesics	≥0–higher number = more consumption of analgesic
CPG – Chronic Pain Grade	Chronic pain-related dysfunction	Grade 0–4 – no pain/no limiting to high pain/severely limiting
MPSS – Mainz Pain Staging System painDETECT	Classification of chronicity of pain Neuropathic characteristic of pain	Stage I–III – higher stage = higher chronicity 0–12 points: unlikely neuropathic component; 13–18 points: unclear result; more than 18 points: probable neuropathic component
SF 12 – Short-Form 12	Quality of life	0–100 – higher score = better general health
DASS – Depression, Anxiety and Stress Scale	Assessment for psychological distress	0–21 points – higher score = more psychological distress (for each subscale)
TSK – Tampa Scale for Kinesiophobia	Pain-related fear of movement	17–68 points – higher score = higher grade of pain-related fear of movement
PHQ – Patient Health Questionnaire	Somatization of mental health disorders	5–9 points: mild; 10–14 points: moderate; 15–30 points: severe level of somatization
CTS* – Catastrophizing Thought Scale	Tendency of thoughts of catastrophizing	0–6 points – higher score = more thoughts of catastrophizing
THS* – Thought of Help-/Hopelessness Scale	Tendency of help-/hopelessness	0–6 points – higher score = more thoughts of help-/hopelessness
TSS* – Thought of Suppression Scale	Tendency to suppress negative thoughts	0–6 points – higher score = more tendency to suppress negative thoughts
PPT – Pressure Pain Threshold	Overall pain sensitivity	50–1000 kPa – pressure when felt as a pain (by the patients)
CPM – Conditioned Pain Modulation	Quantification of ability to condition to a pain	0–1: lower values = higher ability of conditioned pain modulation

Note:

^*Subscale of the Kiel Pain Inventory.