(1) DA: Doppler activity (Grades 0–4); (2) Δ DA: Change in Doppler activity; (3) TT: Thickness of common extensor tendon (in millimetres); (4) Δ TT: Change in Thickness of common extensor tendon; (5) No. and (%) TCET: Number and percentage of patients who had tears in the common extensor tendon; (6) No. and (%) OCET: Number and percentage of patients who had oedema in the common extensor tendon; (7) No. and (%) RTCET: Number and percentage of patients who had reduced thickness of the common extensor tendon; (8) No. and (%) PIT: Number and percentage of patients who had probe-induced tenderness; (9) No. and (%) CELE: Cortical erosion at the lateral epicondyle. (α) SD: Standard deviation; (β) SE: Standard error. (A) 0: baseline assessment; (B) 3M: 3 month; (C) 6M: 6 months.