The Italian version of the Postural Assessment Scale for Stroke Patients (PASS): transcultural translation and validation.

Introduction: The Postural Assessment Scale for Stroke Patients (PASS) is commonly used by health professionals in Italy in several different translations. This study aimed to provide a validated version in Italian. The main focus is on the evaluator, to guarantee a uniform application and interpretation of the statements and scoring for each item in the Italian context.

Methods: A standardized protocol was used for the translation and cross-cultural adaptation. A pilot study conducted using the first draft of the scale led to a revised version, PASS-IT. A principal component analysis (PCA) was performed. The correlation with the Trunk Control Test (TCT) was examined for concurrent validity. In addition, the relationship with the Barthel Index (BI) and the Functional Ambulation Categories (FAC) was tested. Patients with recent stroke were tested for intra-rater (N = 49) and inter-rater agreement (N = 30). Cronbach's alpha, item-to-total correlation, corrected inter-item correlation, the intraclass correlation coefficient (ICC), and measurement error were used to evaluate internal consistency and intra-/inter-rater reliability.

Results: The PCA showed a two-dimensional structure, with high reliability in both subsections ("non-weight-bearing" = 0.865; "weight-bearing" = 0.949). A strong correlation ( > 0.80) was found with the TCT, the BI, and the FAC. The PASS-IT showed high internal consistency, intra-rater (ICC = 0.942) and inter-rater reliability (ICC = 0.940).

Conclusions: The PASS-IT is a recommended scale, suitable for clinical practice and research in the acute and subacute stage. The introduction of operating instructions resulted in the uniform application. A different order of the items allows faster administration, reducing changes of posture.