Reliability of levator scapulae index in subjects with and without scapular downward rotation syndrome

Abstract Objectives The objective of this study was to introduce levator scapulae (LS) measurement using a caliper and the levator scapulae index (LSI) and to investigate intra- and interrater reliability of the LSI in subjects with and without scapular downward rotation syndrome (SDRS). Design Two...

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Bibliographic Details
Published in:Physical therapy in sport 2016-05, Vol.19, p.1-6
Main Authors: Lee, Ji-Hyun, PT, PhD, Cynn, Heon-Seock, PT, PhD, Choi, Woo-Jeong, PT, MSc, Jeong, Hyo-Jung, PT, MSc, Yoon, Tae-Lim, PT, MA, PhD
Format: Article
Language:English
Subjects:
Biomechanical Phenomena - physiology
Confidence intervals
Dyskinesias - physiopathology
Humans
Intraclass coefficients
Kidnapping
Levator scapulae
Male
Pain
Physical Medicine and Rehabilitation
Physical therapy
Range of Motion, Articular - physiology
Reproducibility of Results
Rotation
Scapula - anatomy & histology
Scapula - physiopathology
Shoulder
Sports Medicine
Standard error of measurement
Studies
Superficial Back Muscles - anatomy & histology
Superficial Back Muscles - physiopathology
Syndrome
Young Adult
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Summary:Abstract Objectives The objective of this study was to introduce levator scapulae (LS) measurement using a caliper and the levator scapulae index (LSI) and to investigate intra- and interrater reliability of the LSI in subjects with and without scapular downward rotation syndrome (SDRS). Design Two raters measured LS length twice in 38 subjects (19 with SDRS and 19 without SDRS). Main outcome measures For reliability testing, intraclass coefficients (ICCs), standard error of measurement (SEM), and minimal detectable change (MDC) were calculated. Results Intrarater reliability analysis resulted with ICCs ranging from 0.94 to 0.98 in subjects with SDRS and 0.96 to 0.98 in subjects without SDRS. These results represented that intrarater reliability in both groups were excellent for measuring LS length with the LSI. Interrater reliability was good (ICC: 0.82) in subjects with SDRS; however, interrater reliability was moderate (ICC: 0.75) in subjects without SDRS. Additionally, SEM and MDC were 0.13% and 0.36% in subjects with SDRS and 0.35% and 0.97% in subjects without SDRS. In subjects with SDRS, low dispersion of the measurement errors and MDC were shown. Conclusions This study suggested that the LSI is a reliable method to measure LS length and is more reliable for subjects with SDRS.
ISSN:1466-853X
1873-1600
DOI:10.1016/j.ptsp.2015.07.002