Testing a Swedish version of OCAIRS on two different patient groups.

Occupational Case Analysis Interview and Rating Scale (OCAIRS) is an instrument for assessing occupational performance. Consisting of a semi-structured interview and a rating scale, OCAIRS is based on the Model of Human Occupation (Kielhofner 1985) and has been translated into Swedish. The rater reliability of the Swedish version (OCAIRS-S) was tested on two different populations: acute psychiatric in-patients and patients suffering from chronic muscular pain. The Intraclass Correlation Coefficient and the Percentage Agreement methods were used to calculate the strength of agreement between raters. Content validity was tested using the Percentage Agreement method. Research results indicate that the instrument has a reasonable rater reliability. Although the content validity study produced insufficient information, it nevertheless supports the use of OCAIRS-S as a reliable instrument. Further research and development on the instrument is recommended.