Serum Levels of Proinflammatory Cytokines in Painful Knee Osteoarthritis and Sensitization

Table 3

Comparison of cytokine concentrations between groups.

Variable	Group	Mean	SD	Median	Quartile 1	Quartile 3
TNFα (pg/mL)	Healthy	1.40	1.02	1.29	0.0	2.8	48	0.457
	Knee OA	2.20	4.52	1.30	1.1	1.5	53
	All	1.82	3.36	1.26	0.0	24.2	101
IL-10 (pg/mL)	Healthy	0.89	0.87	1.30	0.0	2.3	48	0.030
	Knee OA	1.58	2.36	1.17	0.0	1.2	53
	All	1.25	1.84	1.09	0.0	15.7	101
IL-6 (pg/mL)	Healthy	2.55	1.06	2.9	2.3	4.0	48	0.031
	Knee OA	4.38	4.61	2.4	1.7	3.1	53
	All	3.48	3.53	2.50	1.2	19.3	101
IL-8 (pg/mL)	Healthy	9.72	5.28	8.80	5.4	16.0	48	0.984
	Knee OA	10.56	8.51	9.00	6.2	12.7	53
	All	10.16	7.14	8.83	0.0	53.5	101

OA: osteoarthritis; Healthy: healthy control; IL: interleukin; TNF: tumor necrosis factor; SD: standard deviation; : number of subjects; : probability.