Article

This study examines the association between strength measurements and
supraspinatus tear in patients with shoulder pain. This study characterized
determinants of abduction strength among patients with tears. DESIGN: A total of
208 patients with shoulder pain were recruited. Strength was tested using a
handheld dynamometer. Supraspinatus tears were diagnosed by combination of
clinical assessment and blinded magnetic resonance imaging review. Associations
of supraspinatus tear with patient characteristics and strength measurements
(abduction, internal rotation and external rotation) were assessed using
multivariable logistic regression models. RESULTS: Patients with supraspinatus
tear had decreased abduction strength (P = 0.02) and decreased external rotation
strength (P < 0.01). When adjusted for age, sex, tear laterality, and body mass
index, decreased abduction strength (odds ratio, 1.18/kg; 95% confidence
interval, 1.06-1.32) and decreased external rotation strength (odds ratio,
1.29/kg; 95% confidence interval, 1.14-1.48) were associated with supraspinatus
tear. In patients with tear, age 60 yrs or older, female sex, and visual analog
scale pain score were significantly associated with decreased abduction strength
but tear size, fatty infiltration, and atrophy were not. CONCLUSIONS: Decreased
abduction and external rotation strength were associated with supraspinatus tear
in patients with shoulder pain. In this cohort, the abduction strength of
patients with tears was influenced by demographic factors but not tear
characteristics.

Langue : ANGLAIS