Prevalence of gluteus medius weakness in people with chronic low back pain compared to healthy controls

Purpose Clinical observation suggests that hip abductor weakness is common in patients with low back pain (LBP). The purpose of this study is to describe and compare the prevalence of hip abductor weakness in a clinical population with chronic non-specific LBP and a matched sample without LBP. Metho...

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Bibliographic Details
Published in:European spine journal 2016-04, Vol.25 (4), p.1258-1265
Main Authors: Cooper, Nicholas A., Scavo, Kelsey M., Strickland, Kyle J., Tipayamongkol, Natti, Nicholson, Jeffrey D., Bewyer, Dennis C., Sluka, Kathleen A.
Format: Article
Language:English
Subjects:
Adult
Buttocks
Case-Control Studies
Female
Humans
Linear Models
Low Back Pain - epidemiology
Low Back Pain - physiopathology
Male
Medicine
Medicine & Public Health
Middle Aged
Muscle Weakness - epidemiology
Muscle Weakness - physiopathology
Muscle, Skeletal - physiopathology
Myalgia - epidemiology
Myalgia - physiopathology
Neurosurgery
Original Article
Paraspinal Muscles - physiopathology
Prevalence
Surgical Orthopedics
Thigh
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Summary:Purpose Clinical observation suggests that hip abductor weakness is common in patients with low back pain (LBP). The purpose of this study is to describe and compare the prevalence of hip abductor weakness in a clinical population with chronic non-specific LBP and a matched sample without LBP. Methods One hundred fifty subjects with chronic non-specific LBP and a matched cohort of 75 control subjects were recruited. A standardized back and hip physical exam was performed. Specifically tensor fascia lata, gluteus medius, and gluteus maximus strength were assessed with manual muscle testing. Functional assessment of the hip abductors was performed with assessment for the presence of the Trendelenburg sign. Palpation examination of the back, gluteal and hip region was performed to try and reproduce the subject’s pain complaint. Friedman’s test or Cochran’s Q with post hoc comparisons adjusted for multiple comparisons was used to compare differences between healthy controls and people with chronic low back pain for both the affected and unaffected sides. Mann–Whitney U was used to compare differences in prevalence between groups. Hierarchical linear regression was used to identify predictors of LBP in this sample. Results Gluteus medius is weaker in people with LBP compared to controls or the unaffected side (Friedman’s test, p  
ISSN:0940-6719
1432-0932
DOI:10.1007/s00586-015-4027-6