Efficacy of single high-molecular-weight versus triple low-molecular-weight hyaluronic acid intra-articular injection among knee osteoarthritis patients

Table 5 Comparison of adverse-events occurrence between the two groups

	HMW-HA	LMW-HA	p-value
Post injection pain Mean (SD)	2.64 (2.265)	1.90 (1.392)	0.286 ^a
Stiffness and heaviness Number (Frequency %)	4 (10.26%)	3 (7.5%)	0.712 ^b
Swelling Number (Frequency %)	4 (10.26%)	2 (5%)	0.432 ^b
Total Number (Frequency %)	8 (20.51%)	5 (12.5%)	0.378 ^b

^a P values refer to comparison between the two groups, based on the student’s T-test
^b P values refer to comparison between the two groups, based on Chi square test