Acute effects of physical exercise on the serum insulin-like growth factor system in women with fibromyalgia

Table 1 Background data for women with fibromyalgia (FM) and the healthy reference group

	Women with FM, n = 22			Reference group, n = 26			p-value
	Mean	SD	Range	Mean	SD	Range
Age, year	44	4	33–50	44	5	29–50	0.808
BMI, kg/m²	28.2	5.3	20.5–38.9	23.2	2.7	18.8–31.2	<0.001
Fat, kg	28.3	12.0	11–51	17.6	8.0	4–40	0.001
Fat free mass, kg	47.8	7.0	38–63	47.9	5.4	39–60	0.695
Tender points, 0–18	13	1.8	11–16	0	0	0	<0.001
Pain localisations, 0–18	13	3.4	6–18	1.0	1.4	0–5	<0.001
Algometry, kPa	255	56	167–403	378	107	173–566	<0.001
Smoking, yes^a	N = 2		0–2	N = 0		0	0.186
Sleep quantity, 1–4	2.8	0.9	1–4	2.1	0.6	1–3	0.003
Sleep quality, 1–4	2.6	0.7	1–4	1.6	0.6	1–3	<0.001
Work hours, 0–40	27	10.5	0–40	37	5.0	20–40	<0.001
FIQ total score, 0–100	48	16	10–73	9	9	0–28	<0.001
Hand force, maximum, right hand, N	215	83	67–381	252	60	130–396	0.129
LTPAI, hours/week	5.3	3.5	1–17	7.0	4.2	1–16	0.170
LTPAI, hard, hours/week	0.6	1.3	0–6	1.4	1.4	0–6	0.024

FIQ Fibromyalgia Impact Questionnaire, LTPAI Leisure Time Physical Activity Instrument, Algometry = pain threshold
^aInformation from one subject with FM was missing