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A cross sectional study of upper extremity strength ten days after a stroke; relationship between patient-reported and objective measures

Artikel i vetenskaplig tidskrift
Författare Hanna C Persson
Anna Danielsson
Katharina S Sunnerhagen
Publicerad i Bmc Neurology
Volym 15
Sidor 178
ISSN 1471-2377
Publiceringsår 2015
Publicerad vid Institutionen för neurovetenskap och fysiologi, sektionen för hälsa och rehabilitering
Centrum för personcentrerad vård vid Göteborgs universitet (GPCC)
Institutionen för neurovetenskap och fysiologi, sektionen för fysiologi
Institutionen för neurovetenskap och fysiologi, sektionen för klinisk neurovetenskap och rehabilitering
Sidor 178
Språk en
Länkar dx.doi.org/10.1186/s12883-015-0436-...
Ämnesord Stroke, Upper extremity, Muscle strength, Self report, Outcome measure, upper-limb function, research arm test, impact scale, pinch strength, reliability, recovery, grip, rehabilitation, performance, validity, Neurosciences & Neurology
Ämneskategorier Neurologi

Sammanfattning

Background: Reduced upper extremity function early after a stroke is common, and a combination of strength capacity and patient-reported measures contribute to setting realistic goals. The validity of the patient's perception of upper extremity strength in relation to objective strength assessments early after a stroke needs to be clarified. The objective was to investigate the relationship between perceived upper extremity strength and measured hand strength at ten days post-stroke. Methods: This study of 99 patients with reduced upper extremity function at 3 days post stroke, were consecutively included from a stroke unit to the Stroke Arm Longitudinal Study at the University of Gothenburg, (the SALGOT-study). The correlations between two questions from the Stroke Impact Scale (SIS 1a and 1b), and a dynamometer measure of hand strength values (percentage of normative values) were investigated. In order to explain differences between the two types of measurements, the accordance between perceived strength in a dichotomized SIS and objective measures was explored. In SIS 1a and 1b, 1-3 points correspond to reduced strength (<80 % or normative strength values). In SIS 1a and 1b, 4-5 points correspond to normal strength (>= 80 % of normative strength values). Results: The correlation between the measured strength values and perceived arm strength was rho 0.82 (p = < 0.001) and with perceived grip strength rho 0.87 (p = < 0.001). Using the dichotomized SIS and the 80 % cut-off correctly classified arm strength in 81 % and grip strength in 84 % of the patients, with a sensitivity of 0.86-0.87, a specificity of 0.62-0.77, positive predicted values of 0.87-0.91 and negative predicated values of 0.64-0.67. Discussion: The discrepancy between assessed strength capacity and self-perceived strength highlights the importanceof including self-perceived assessments early after stroke, in order to increase knowledge of a patient'sawareness of functioning or lack thereof. Conclusions: Ten days after stroke in patients without severe cognitive disabilities, this study suggests that despite high correlations between measures, an objective assessment of arm and hand strength does not always reflect the patient's perspective. A combination of self-reported and objective strength assessment is requested to enhance in setting of realistic goals early after stroke.

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