Tab. II.

Comparison of different outcome scores within groups over the time.

Group	N	Outcome	Baseline	Three months after the intervention
			Mean ± SD	Mean ± SD	p
PRP	41.00	Pain	13.66 ± 3.60	6.44 ± 1.42	0.001
	41.00	Stiffness	3.10 ± 0.80	1.80 ± 0.93	0.001
	41.00	Physical function	36.07 ± 6.71	18.85 ± 6.70	0.001
	41.00	Total	52.37 ± 9.19	27.10 ± 8.46	0.001
Hyaluronic acid	44.00	Pain	11.93 ± 1.59	10.61 ± 1.17	0.001
	44.00	Stiffness	2.91 ± 0.86	2.52 ± 0.73	0.001
	44.00	Physical function	35.36 ± 6.42	33.05 ± 6.41	0.001
	44.00	Total	50.20 ± 8.41	46.18 ± 7.90	0.001