Table 2.

Study assessment measures

Questionnaires	Research assistant led	Research psychologist led
Pain and fatigue visual analogue scales [25, 26]	Autonomic assessment	Mini International Neuropsychiatric Interview (MINI [27])
BAI [28]	Interoception assessment [29]	Psychological assessment
Generalised Anxiety Disorder-7 (GAD-7 [30])	Hypermobility assessed using the Brighton Criteria for joint hypermobility syndrome and 2017 Hypermobile Ehlers-Danlos Syndrome (hEDS) Criteria [31]
Patient Health Questionnaire-9 (PHQ-9 [32])
Work & Social Adjustment Scale [33]
Wender Utah Rating Scale [30]
Ritvo Autism Asperger Diagnostic Scale-Revised [34]
Anxiety Sensitivity Index [35]
Toronto Alexithymia Scale-20 [36]
Dissociative Experiences Scale [37]
Panic Disorder Severity Scale [38]
Body Perception Questionnaire [39]
Autonomic Symptoms of Quality of Life Score [40]