Table 1. Demographic features of the participants.

	FMS group					CLBP group					Healthy control group
Features	n	%	Mean±SD	Median	Q1-Q3	n	%	Mean±SD	Median	Q1-Q3	n	%	Mean±SD	Median	Q1-Q3	p
Age (year)			45.0±10.0**	45	38-51			45.1±12.5**	45	37-54			37.0±10.0	36	29-44
Sex																<0.001*
Male	51	11.0†				154	33.8‡				127	28.9‡
Female	414	89.0‡				301	66.2†				313	71.1†
Having a child																<0.001*
Yes	376	80.9‡				335	73.8				269	61.6†
No	89	19.1†				119	26.2				168	38.4‡
Education																<0.001*
Primary school	211	45.4‡				158	34.8				43	9.8
High school	111	23.9				128	28.2				100	22.7
University	143	30.8†				168	37.0†				297	67.5‡
Marital status																<0.001*
Single	62	13.3†				61	13.4†				121	27.5‡
Divorced	31	6.7				30	6.6				31	7.0
Married	372	80.0‡				364	80.0†				288	65.5†
FMS: Fibromyalgia syndrome; CLBP: Chronic low back pain; SD: Standard deviation; * Pearson chi-squared test; ** Kruskal Wallis test; Percentages with ‡ and † indicate higher and lower values than expected values considering the independence, respectively.