Table 1. Patients characteristics.

	Platelet-rich plasma	Hyaluronic acid	P -value
Number of patients	14	15	–
Body mass index	28.3 (2.9*)	28.1 (3.9*)	0.60
Age (years), Mean (SD)	62.78 (6.10*)	63.40 (4.99*)	0.77
Gender	11 females 3 males	13 females 2 males	0.93
Affected side	Right = 7 Left = 7	Right = 11 Left = 4	0.36
Radiological Classification	Grade II = 9 Grade III = 5	Grade II = 9 Grade III = 6	1
Knee swelling	Yes = 1 No = 13	Yes = 2 No = 13	1
Knee stiffness	Yes = 1 No = 13	Yes = 2 No = 13	1

Abbreviation : SD, standard deviation.

Source: Prevent Senior São Paulo.