Excellent reliability for MRI grading and prognostic parameters in acute hamstring injuries.

Abstract:

BACKGROUND:Categorical grading and other measurable MRI parameters are frequently utilised for predicting the outcome of hamstring injuries. However, the reliability and smallest detectable difference (SDD) have not been previously evaluated. It therefore remains unclear if the variability in previously reported results reflects reporting variation or actual injury status. METHODS:25 hamstring injuries were scored by two experienced radiologists using the Peetrons grading and specific prognostic MRI parameters: distance from ischial tuberosity (cm), extent (cranio to caudal, anterior to posterior, medial to lateral; (cm)), maximum cross-sectional area (%), volume (cm(3)) of the oedema. The interobserver and intraobserver reliability was calculated along with the SDDs for each scale variable. RESULTS:There were 3 Grade 0 (12%), 11 grade 1 (44%), 9 grade 2 (36%) and 2 grade 3 (8%) injuries. Cronbach's α values for grading were 1.00 (inter) and 0.96 (intra), respectively. The intraclass correlation coefficients for the prognostic MRI parameters were between 0.77 and 1.0. The SDDs varied between each parameter. CONCLUSIONS:Excellent interobserver and intraobserver reliability was found for grading and prognostic MRI parameters in acute hamstring injuries. In daily practice and research, we can be confident that scoring hamstring injuries by experienced radiologists is reproducible. The documented SDDs allow meaningful clinical inferences to be made when assessing observed and reported changes in MRI status.

journal_name

Br J Sports Med

authors

Hamilton B,Whiteley R,Almusa E,Roger B,Geertsema C,Tol JL

doi

10.1136/bjsports-2013-092564

subject

Has Abstract

pub_date

2014-09-01 00:00:00

pages

1385-7

issue

18

eissn

0306-3674

issn

1473-0480

pii

bjsports-2013-092564

journal_volume

48

pub_type

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