Table 1. Characteristics of both groups.

* indicates t-test value, ** indicates chi-square values

HMW: high molecular weight, HA: hyaluronic acid, NSAID: nonsteroidal anti-inflammatory drug, SD: standard deviation

Parameters	Single intra-articular injection of HMW HA	NSAID group	Statistical test value	p-value
Age in years (mean ± SD)	56.9 ± 9.7	53.1 ± 7.2	1.634*	0.149
Sex			2.073**	0.09
Male	6 (20.7%)	11 (42.3%)
Female	23 (79.3%)	15 (57.3%)
Kellgren-Lawrence grade			0.0009**	0.578
Grade 3	1 (3.4%)	2 (7.7%)
Grade 2	28 (96.6%)	24 (92.3%
Side of involvement			1.79**	0.203
Left	15 (51.7%)	9 (34.6%)
Right	14 (48.3%)	17 (65.4%)