Fig. 1

Participants’ flow diagram. Asterisk denotes did not receive allocated intervention because of: a horse accident (1), preferred the surgical option (1), entitled for hip surgery (1), had no pain the day of the first intervention (1) and declined without any reason (1). Number sign indicates discontinued intervention because of post-tenotomy pain. During the study, one patient treated with PRP was lost to follow-up after the 6-week assessment and four patients (three from the lidocaine group and one from the PRP group) were lost after the 6-month assessment. We had additional missing data for two main reasons. First, many patients did not fill the DASH properly (i.e., with less than 25 answers over 30 questions, the DASH was not valid for analyses). Second, some patients attended to the echography service during follow-up but failed orthopaedists ‘consultation where clinical data were collected