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J Orthop Sports Phys Ther. 2009 Apr;39(4):270-7. doi: 10.2519/jospt.2009.2879.

The relationship of pain intensity, physical impairment, and pain-related fear to function in patients with shoulder pathology.

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1
Shands Rehabilitation, UF, Gainesville, FL 32607, USA. lentzt@shands.ufl.edu

Abstract

STUDY DESIGN:

Cross-sectional.

OBJECTIVES:

This study examined the baseline relationship of pain intensity, physical impairment, and pain-related fear to shoulder function.

BACKGROUND:

There is no consensus regarding the influence psychological variable have on function and recovery in individuals with shoulder pathologies. While pain-related fear has been shown to predict disability for patients with low-back and cervical pain, this relationship has not been consistently reported for patients with shoulder pain.

METHODS AND MEASURES:

One hundred forty-two subjects (78 male, 64 female; mean age, 41.4 years) with nonoperative unilateral shoulder disorders were identified from a clinical database of impairment and outcome measures.Demographic information, duration of symptoms, mechanism of injury, pain intensity, pain-related fear, and range-of-motion (ROM) measures were collected. Self-report of function was measured with the Shoulder Pain and Disability Index (SPADI). Hierarchical regression analysis determined the proportions of explained variance in function.

RESULTS:

Demographic variables (duration of symptoms, sex, age, and mechanism of injury) collectively contributed approximately 9% (P=.003) of the variance in function scores. Average pain intensity and flexion ROM contributed an additional 22% (P<.001) of the variance, and Tampa Scale of Kinesiophobia (TSK-11) scores contributed an additional 3% (P<.001). In the final parsimonious model, presence of symptoms longer than 3 months (beta=.23, P=.003), pain intensity (beta=.25, P=.002), shoulder flexion ROM index (beta=-.35, P=.001), and kinesiophobia (beta=.17, P=.026) explained 33% of the variance in SPADI function score (P<.001).

CONCLUSIONS:

Presence of symptoms longer than 3 months, average pain intensity, flexion ROM index (strongest contributor in multivariate model), and fear-of-pain scores all contributed to baseline shoulder function. The immediate clinical relevance of these findings is unclear but they do provide direction for prospective studies.

PMID:
19346624
DOI:
10.2519/jospt.2009.2879
[Indexed for MEDLINE]
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