Table 1. Antioxidative parameters and NO level among FMS cases and control group (Mann-Whitney U test).

Case group, the participant with fibromyalgia syndrome; control group, participant without fibromyalgia syndrome; Cat, catalase enzyme; SOD, superoxide dismutase; GR, glutathione reductase; GPx, glutathione peroxidise; FIQR, fibromyalgia impact questionnaire-revised, p< 0.001*significance; MDA, malondialdehyde; NO, nitric oxide

Variables	Median (Min.-Max.)		P Value
	Cases	Controls
Cat (kU/min/mg protein)	2.39 (1.05–7.90)	12.09 (6.91–18.74)	<0.001*
SOD (μmol/min/mg protein)	40.43 (30.13–41011.00)	60.73 (40.16–76.00)	<0.001*
GR (μmol/min/mg protein)	1.19 (0.18–3.65)	13.59 (10.00–16.87)	<0.001*
GPx (μmol/min/mg protein)	18.45 (6.31–62.37)	58.00 (30.82v–79.85)	<0.001*
NO (mol/gr)	62.59 (0.75–458.65)	13.00 (8.00–20.00)	<0.001*
MDA (mmol/mg protein)	32.37 (6.83–45.01)	11.56 (8.00–27.54)	<0.001*
FIQR Total	76.00 (45.00–98.70)	5.00 (1.00–16.00)	<0.001*