DOS BULLETIN - Dansk Ortopædisk Selskab

2010-378_DOS nr. 3 2010 29/09/10 10:08 Side 83
Translation and validation of the Danish version of the
Patient Rated Wrist Evaluation questionnaire
Jesper O. Schønnemann, Kristian Larsen,
Torben B. Hansen, Kjeld Søballe
Orthopedic Research Unit, Hospital Unit West;
Department of Orthopedics, Aarhus University Hospital
Background: The need for validated outcome measures is increasing.
The Patient Rated Wrist Evaluation (PRWE) is a 15- item wrist specific
questionnaire used to measure the effect of clinical treatment of wrist
injuries.
Purpose: The purpose was to translate into Danish, validate and examine
the unidimensionality of the Patient Rated Wrist Evaluation in
patients with wrist fractures.
Methods: Translation was done by an expert panel followed by evaluation
of a lay panel and a field test on ten patients. Afterwards 60 patients
treated for wrist fractures with osteosynthesis or conservatively were
included. The patients answered the Patient Rated Wrist Evaluation and
the Nottingham Health Profile (NHP) at 1 week and 6 weeks after start
of treatment, and again the Patient Rated Wrist Evaluation three days
after last control. Rasch analysis was conducted using RUMM2030 software
to assess unidimensionality and to create a fitted model in order to
convert ordinal scores to interval scores.
Findings: Both lay panel comments and field test revealed issues not
dealt with by the expert panel, including difficulty estimating average
pain which was altered to estimating maximum pain. Cronbach’s alpha:
0.94. Intraclass correlation coefficient: 0.88. Difference of Means: 5.7
(CI: 1.12-10.37, P=0.017). Convergent validity at first and last control
was for pain, 0.51 and 0.46, and physical mobility, 0.56 and 0.64, respectively.
Rasch analysis showed unidimensionality. There was no Differential
Item Functioning (DIF) for the time interval. There were indications
of misfit of items, but these items displayed good content validity and
were within acceptable parameters. A nomogram for conversion from
ordinal score to interval score could be made.
Conclusion: The translation resulted in a modified questionnaire that
represents correct easy-understandable Danish. The questionnaire can be
used in clinical and research settings regarding patients with wrist fractures,
and both ordinal and interval scores should be reported.
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