Table 2.

Comparison of results of serum cytokine concentration between fibromyalgia and knee osteoarthritis patients

Variable	Group	Mean	SD	Median	Min	Max	n	P-value*	P-value#
IL-12p70 (pg/mL)	Knee osteoarthritis	11.4	37.36	0.0	0.0	178.3	53	<0.001	0.156
	Fibromyalgia	7.7	26.17	2.6	0.0	171.5	60
TNFα (pg/mL)	Knee osteoarthritis	2.2	4.52	1.2	0.0	24.2	53	0.128	0.630
	Fibromyalgia	2.0	2.08	2.0	0.0	11.7	60
IL-10 (pg/mL)	Knee osteoarthritis	1.6	2.36	1.2	0.0	15.7	53	0.001	0.949
	Fibromyalgia	2.0	1.13	2.0	0.0	7.8	60
IL-6 (pg/mL)	Knee osteoarthritis	4.4	4.61	2.8	1.2	19.3	53	0.488	0.395
	Fibromyalgia	3.5	1.86	3.3	0.0	12.3	60
IL-1β (pg/mL)	Knee osteoarthritis	1.9	3.30	1.1	0.0	17.0	53	<0.001	0.143
	Fibromyalgia	3.4	2.27	2.7	0.0	14.0	60
IL-8 (pg/mL)	Knee osteoarthritis	10.6	8.50	8.7	0.0	53.5	53	0.434	0.688
	Fibromyalgia	10.5	8.67	7.2	0.0	45.5	60

Notes:

^*Results of Mann–Whitney U test;

^#results of test adjusted for age.

Abbreviations: SD, standard deviation; Min, minimum; Max, maximum; IL, interleukin; TNF, tumor necrosis factor.