Use of hyaluronic acid injection after arthroscopic release in lateral patellar compression syndrome with degenerative cartilage changes: randomized control trial

Table 3 The mean differences of VAS score for knee joint between pre-operative and post-operative assessments in four time periods for group A

Study variables	Periods of assessment	N	Mean	SD	Paired t-test	P-value
VAS score	VAS score preoperatively	45	8.44	0.50	25.02	< 0.001٭
	VAS score 3 months postoperatively	45	2.06	1.49	25.02	< 0.001٭
	VAS score preoperatively	45	8.44	0.50	29.83	< 0.001٭
	VAS score 6 months postoperatively	45	1.31	1.39	29.83	< 0.001٭
	VAS score preoperatively	45	8.44	0.50	43.09	< 0.001٭
	VAS score 1 year postoperatively	45	0.80	0.99	43.09	< 0.001٭
	VAS score preoperatively	45	8.44	0.50	50.99	< 0.001٭
	VAS score 2 year postoperatively	45	0.53	0.89	50.99	< 0.001٭

ISSN: 1471-2474