The effect of occipital nerve field stimulation on the descending pain pathway in patients with fibromyalgia: a water PET and EEG imaging study

Table 1 Primary and secondary outcomes at baseline and 4-weeks, 12-weeks, 18-weeks, and 24-weeks after baseline

	Baseline	4-weeks	12-weeks	18-weeks	24-weeks	p value
Primary Outcome Measure
FIQ	59.26^a	37.16^b	40.36^b	42.04^b	43.95^b	0.006
Secondary Outcome Measures
PVAQ	40.57^a	32.71^b	26.71^b	26.71^b	26.57^b	0.003
PCS	20.84^a	10.43^b	8.86^b	8.29^b	10..28^b	0.006
NRS
Overall Quality of Life	3.14^a	6.00^b	6.14^b	6.00^b	5.00^b	0.01
Overall Fibromyalgia Pain	7.00^a	4.00^b	4.29^b	4.42^b	4.85^b	0.001
Overall Bone and Joint Pain	8.00^a	4.14^b	5.14^b	4.86^b	5.14^b	0.004
Overall Non-Specified Pain	5.57^a	4.00^a,b	3.28^b	3.42^b	3.87^b	0.033