title: Proximal hamstring tendon avulsion surgery: evaluation of the Perth Hamstring Assessment Tool.
abstract: OBJECTIVE
  The purpose of the present study was to validate a new scoring system for proximal hamstring injury-the Perth Hamstring Assessment Tool (PHAT).
  
  
  METHODS
  This is a prospective series of 74 consecutive proximal hamstring surgical repairs in 72 patients, with a median age of 50.5 years (range 16-74). Patients completed the PHAT, SF12 Health Survey and Lower Extremity Functional Scale (LEFS). The scoring system was validated by calculating its internal consistency, reproducibility, reliability and sensitivity to change. Construct validity was evaluated using Pearson's correlation analysis to examine the strength of association between the PHAT, LEFS and SF-12 scores.
  
  
  RESULTS
  The PHAT showed high completion rate (100 %), high internal consistency (Cronbach's alpha 0.80), high reproducibility (ICC 0.84) and high sensitivity to change. There was moderate correlation with the LEFS and low correlation with the Physical Component Score of the SF-12.
  
  
  CONCLUSIONS
  This study has validated the PHAT as an assessment tool for proximal hamstring tendon injuries. The new questionnaire provides a measure of outcome that is reliable and sensitive to clinically important change. This simple questionnaire provides the clinician with a quick and practical tool for assessing patients with proximal hamstring injuries: to assess pre-operative disability and monitor recovery post-operatively.
  
  
  METHODS
  II.
authors.affiliation: Department of Orthopaedic Surgery, Fremantle Hospital, Fremantle, WA, Australia. blakeney@gmail.com.|Department of Orthopaedic Surgery, Sir Charles Gairdner Hospital, Nedlands, WA, Australia. blakeney@gmail.com.
authors.forename: William G
authors.initials: WG
authors.lastname: Blakeney
authors.affiliation: Department of Orthopaedic Surgery, Fremantle Hospital, Fremantle, WA, Australia.
authors.forename: Simon R
authors.initials: SR
authors.lastname: Zilko
authors.affiliation: Shenton Park Physiotherapy Clinic, Shenton Park, WA, Australia.
authors.forename: Steven J
authors.initials: SJ
authors.lastname: Edmonston
authors.affiliation: Department of Orthopaedic Surgery, Sir Charles Gairdner Hospital, Nedlands, WA, Australia.
authors.forename: Natalie E
authors.initials: NE
authors.lastname: Schupp
authors.affiliation: Department of Orthopaedic Surgery, Mount Hospital, Perth, WA, Australia.|Perth Orthopaedic and Sports Medicine, West Perth, WA, Australia.
authors.forename: Peter T
authors.initials: PT
authors.lastname: Annear
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D000070632:Hamstring Tendons / Q000293:injuries* / Q000601:surgery*; D006306:Health Surveys; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D020127:Recovery of Function; D015203:Reproducibility of Results; D012421:Rupture / Q000601:surgery; D057566:Self Report; D011795:Surveys and Questionnaires; D055815:Young Adult
keywords: Proximal hamstring tendon; Questionnaire; Surgical repair; Validation