Table 1.

Identification features of publications.

Reference	Country	Design	Psychotherapeutic intervention	Pain measure
Original research
[22]	Italy	Single-arm pre-post	Dance movement	Pain items from FIQ
[23]	Spain	Single-arm pre-post (pilot)	CBT for positive emotions	Numeric rating scale
[24]	Spain	Single-arm pre-post	CBT for insomnia	McGill Pain Questionnaire (short form)
				Pain items from FIQ
[25]	Spain	Two-arm RCT	Psychoeducation	Items from FIQ
[26]	USA	Three-arm RCT	Emotion awareness and expression therapy	Brief Pain Inventory
			CBT
			Psychoeducation
[27]	USA	Two-arm RCT	Guided imagery	Brief Pain Inventory (short form)
[28]	Spain	Three-arm RCT	Group problem solving	VAS
[29]	Spain	Two-arm RCT	Guided imagery	McGill Pain Questionnaire (long form)
				VAS
[30]	Spain	Two-arm RCT	Guided imagery	Pressure algometry
				Pain items from FIQ
[31]	Spain	Two-arm RCT	Group music and imagery method	Present Pain Intensity Scale of the McGill Pain Questionnaire
[32]	Netherlands	Two-arm RCT	Guided imagery	VAS
Study protocol
[33]	Chile	Two-arm RCT	Behavioral activation	Composed Pain Intensity Index
[34]	Spain	Two-arm RCT	Personal construct therapy	VAS

FIQ: Fibromyalgia Impact Questionnaire; CBT: cognitive behavioral therapy; RCT: randomized control trial; VAS: Visual Analogue Scale; USA: United States of America.