Impact on participation and autonomy questionnaire: internal scale validity of the Swedish version for use in people with spinal cord injury.
OBJECTIVE
To evaluate aspects of internal scale validity and reliability of the Swedish version of the Impact on Participation and Autonomy questionnaire (IPA-S) for use in people with spinal cord injury.


METHODS
A total of 161 persons with spinal cord injury.


METHODS
IPA-S psychometric properties were evaluated using Rasch rating scale analysis.


RESULTS
The results show that the IPA-S has 27 items for perceived participation and 6 items for perceived problems with participation, indicating 2 underlying unidimensional constructs for use in people with spinal cord injury, after removal of misfitting items. The established hierarchical order of the item calibration values in both scales appeared logical and the distances between the items, with a few exceptions in the problem scale, were appropriate. Both scales demonstrated good separation reliability. The range of item calibration values in both scales did not fully cover the range of measures of persons' perceived participation and problems thereof.


CONCLUSIONS
The psychometric properties of IPA-S are promising and indicate that IPA-S has potential to be developed further.
Lund
Maria Larsson
ML
Department of Community Medicine and Rehabilitation, Occupational Therapy, Umeå University, Umeå, Sweden. maria.larsson.lund@occupther.umu.se
Fisher
Anne G
AG
Lexell
Jan
J
Bernspång
Birgitta
B
D000203:Activities of Daily Living; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D004185:Disability Evaluation; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017063:Outcome Assessment, Health Care; D010358:Patient Participation; D026684:Personal Autonomy; D011594:Psychometrics; D015203:Reproducibility of Results; D012959:Socioeconomic Factors; D013119:Spinal Cord Injuries / Q000503:physiopathology / Q000523:psychology / Q000534:rehabilitation*; D011795:Surveys and Questionnaires; D013548:Sweden