Construct validity, sensitivity and specificity of the USCD Performance-based Skill Assessment 2 in a mixed...

Area of Science:

• Psychiatry
• Psychometrics
• Neuropsychology

Background:

• Functional capacity assessment is crucial for understanding real-world functioning in psychiatric illnesses.
• Tools assessing autonomous living and psychosocial goal pursuit are vital for patient care.

Purpose of the Study:

• To evaluate the psychometric properties of the Portuguese version of the University of California San Diego Performance-based Skill Assessment 2 (UPSA-2-PT).
• To assess the reliability, validity, and discriminant ability of the UPSA-2-PT in a Portuguese sample.

Main Methods:

• A sample of 110 participants (37 schizophrenia patients, 27 relatives, 46 controls) completed the UPSA-2-PT.
• Reliability was assessed via inter-rater reliability and internal consistency.
• Convergent validity, discriminant ability, and optimal cutoff scores were determined using ROC analysis and Youden's Index.

Main Results:

• The UPSA-2-PT exhibited excellent inter-rater reliability and good internal consistency and construct validity.
• The tool demonstrated good discriminant ability between schizophrenia patients and controls.
• An optimal cutoff score of 81.59 yielded an 86.7% correct classification rate.

Conclusions:

• The Portuguese UPSA-2-PT is a reliable and valid measure of functional capacity.
• The findings support the use of the UPSA-2-PT as a valuable tool in research and clinical practice for Portuguese-speaking populations.
• This validated instrument aids in assessing functional deficits in individuals with psychiatric conditions.