Table 4.

Within-Group Comparison of VAS Scores^a

	Mean Difference (95% CI)	P
PRP group
Before treatment vs 1-mo follow-up	35.67 (25.69 to 45.64)	<.01
Before treatment vs 6-mo follow-up	51.53 (39.56 to 63.51)	<.01
1- vs 6-mo follow-up	15.87 (4.31 to 27.42)	<.01
Corticosteroid group
Before treatment vs 1-mo follow-up	29.69 (12.22 to 47.16)	<.01
Before treatment vs 6-mo follow-up	26.56 (12.64 to 40.48)	<.01
1- vs 6-mo follow-up	–3.13 (–20.28 to 14.03)	.70

^a Bolded P values indicate statistical significance. PRP, platelet-rich plasma; VAS, visual analog scale.