Motivational nondirective resonance breathing versus transcutaneous vagus nerve stimulation in the treatment of fibromyalgia: study protocol for a randomized controlled trial

Table 2 Assessments as a function of timepoints (according to the 2013 SPIRIT figure guidelines)

Measure	Target	T0	Intervention	T1
		Baseline	Morning and evening treatment (4 recordings/day)	Post-intervention (2 weeks)
NRS	Average pain intensity	X		X
NRS	Current pain intensity	X	X	X
HRV	Hear rate variability	X	X	X
BMI and WHR	Body mass index and waist-to-hip ratio	X
BP	Blood pressure	X		X
CPA	Experimental pain threshold, tolerance, and limit	X		X
CEQ	Treatment efficacy expectation	X
PGIC	Treatment efficacy impression			X
EQ-5D-5L	Health-related quality of life	X		X
HSCL-25	Stress and depression	X		X
MAIA-2	Interoceptive awareness	X		X
SpREUK-15	Spirituality	X		X
PCS	Catastrophizing	X		X
BPI	Pain interference	X		X
ISI	Insomnia	X		X
ODI	Functional disability	X		X
General health	Overall health/nutrition and sociodemographic	X

ISSN: 1745-6215