Table 4. Comparison of PRTEE Scores between US-Guided PRP Group and US-Guided Steroid Group at Timely Intervals (n = 64).

PRTEE	Group		p-value
	PRP (n = 32)	Steroid (n = 32)
Presentation	43.40 ± 9.53	45.34 ± 10.09	0.433
2 wk	39.50 ± 9.15	30.68 ± 10.18	0.001*
p-value	0.768	0.310
1 mo	23.53 ± 7.19	19.5 ± 3.76	0.007*
p-value	0.100	0.019†
3 mo	10.81 ± 5.36	8.71 ± 2.41	0.048*
p-value	0.005†	< 0.001†
6 mo	6.87 ± 2.75	6.06 ± 2.07	0.188
p-value	< 0.001†	< 0.001†
1 yr	5.18 ± 1.71	7.25 ± 1.58	< 0.001*
p-value	< 0.001†	< 0.001†
2 yr	3.96 ± 1.51	7.53 ± 1.19	< 0.001*
p-value	< 0.001†	< 0.001†

Values are presented as mean ± standard deviation.

PRTEE: Patient-Rated Tennis Elbow Evaluation, US: ultrasound, PRP: platelet-rich plasma.

Statistically significant: ^*Unpaired t-test. ^†Paired t-test.