The aim of the present study is to evaluate the construct validity of the SwePASS, more specifically to evaluate the following measurement properties unidimensionality, targeting of persons and items, category function, local independence, invariance, and the reliability selleck chem of the SwePASS using Rasch analysis. Methods Participants, setting and instrument The inclusion criterion was a first ever stroke, defined according to the World Health Organization. Exclusion criteria were co morbidities such as leg amputation, a diagnosis of dementia or severe psychiatric diseases. The Regional Ethics Committee of G?teborg, Sweden, approved the study protocol. Written informed consent was obtained from all participants or their next of kin prior to participation, in compliance with the ethical principles set forth in the Declaration of Helsinki.

Data were used of 150 patients with a first ever clinical stroke, based on SwePASS assessments by physiotherapists. The data were collected Inhibitors,Modulators,Libraries at a stroke unit at Sahlgrenska University Hospital, G?teborg, Sweden between days 4 and 7 after stroke onset. The current study Inhibitors,Modulators,Libraries is part of the Postural Stroke Study in Gothenburg. The Inhibitors,Modulators,Libraries SwePASS, like the PASS, contains 12 items, based on a four category scale from 0 to 3. A category of 0 implies that the patient cannot perform the activity and or has impaired postural control. A category of 3 implies that the activity can be performed without any help or support or with the best possible performance regarding a specified support or time. Each item of the SwePASS has three thresholds, one less than the number of response categories.

A Inhibitors,Modulators,Libraries threshold is the point at which the probability of a response in either one of two adjacent categories is equal. In items 4 and 7 9, the patient is required to maintain a position for a specific length of time. The remaining items are scored according Inhibitors,Modulators,Libraries to different levels of support. When the scores of each item are added, the sum score of SwePASS will be between 0 and 36, where a higher score indicates better postural control. Rasch analysis of SwePASS Initially, to determine which of the two Rasch models was suitable, the Rating Scale Model or the Partial Credit Model, a Likelihood Ratio test was performed in the RUMM2030. The Rating Scale Model indicates that a set of items share the same rating structure, while the Partial Credit Model specifies that each item has its own rating scale structure.

The unidimensionality and invariance of the SwePASS were continuously tested during the analyses. This was done by evaluating the overall fit, the category function, individual fit of the items and persons, local independence, reliability, and the differential item functioning of items. Finally, unidimensionality was further tested using http://www.selleckchem.com/products/Imatinib-Mesylate.html the method described by Everett Smith.