Study designs of evaluations included in the review
Inclusion criteria were not specified in terms of the study design. Studies that had fewer than 10 participants or less than 1 year’ follow-up were excluded.
Specific interventions included in the review
Studies of surgical interventions that excise abnormal tendonitis tissue were eligible for inclusion if the surgical procedure were reported. Studies of combined surgical interventions were excluded. Where reported, the procedures evaluated included closed and not closed paratenon; bony patella work was undertaken in some studies.
Participants included in the review
Studies of patients with chronic patellar tendonitis were eligible for inclusion. Studies of patients with complete tendon ruptures, or mid or distal patella tendon lesions were excluded. Where reported, the average age of the participants was between 20 and 31 years, the majority were male, and the duration of symptoms before treatment was between 6 months and 3.2 years.
Outcomes assessed in the review
Studies reporting surgical outcomes were eligible for inclusion. The outcomes were reported as being successful or not.
How were decisions on the relevance of primary studies made?
Two reviewers selected studies for the review; it was not stated how any disagreements were resolved.