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Validity of the Michigan Hand Outcomes Questionnaire in Patients With Stroke
Henk J Arwert1, Saskia Keizer1, Cornelis H Kromme1
1Sophia Rehabilitation Center, The Hague, The Netherlands.
Objective:
To investigate the measurement properties of the Dutch version of the Michigan Hand Outcomes Questionnaire (MHQ) in patients with stroke.
Design:
Validation study.
Setting:
Outpatient rehabilitation clinic.
Participants:
Consecutive patients with stroke (N=51; mean age, 60±11y; 16 women [31%]).
Interventions:
Patients were asked to complete the MHQ (57 items) and Medical Outcomes Study 36-Item Short-Form Health Survey (SF-36). Additional assessments included the Barthel Index and performance tests for hand function (Action Research Arm Test, Nine Hole Peg Test, Frenchay Arm Test, Motricity Index).
Main Outcome Measures:
Associations between the MHQ and other outcome measures were determined using Spearman correlation coefficients and the internal consistency of the MHQ using Cronbach α. Floor or ceiling effects were present if >15% of the patients scored minimal or maximal scores, respectively. Test-retest reliability was established by the intraclass correlation coefficient.
Results:
The mean MHQ total score was 70.0±22.4, with Cronbach α being .97. The MHQ total score correlated significantly with the physical component summary of the SF-36, the Barthel Index, and all hand function performance tests (P<.01). The MHQ total score showed no floor or ceiling effects. The test-retest intraclass correlation coefficient was .97.
Conclusions:
This study provides preliminary evidence that the MHQ is an internally consistent, valid, and reliable hand function questionnaire in outpatients after stroke, although these results need to be further confirmed.
