Eligibility criteria
| Criteria | Description |
| Inclusion criteria | Patients diagnosed via MRI with a proximal hamstring avulsion. Patients registered in the electronic system as surgically treated for proximal hamstring injury. |
| Exclusion criteria | Wood type 1 and 2 (1: MRI describing an proximal hamstring injury but with no avulsed tendons or 2: a bony avulsion). Inconclusive MRI. Unable to speak Swedish. Previous proximal hamstring avulsion or proximal hamstring surgery. Patients treated for their proximal hamstring avulsion at another hospital. Previous other surgical procedures (eg, knee arthroplasty) on the same leg after the proximal hamstring avulsion but before the follow-up. |