Consistency and construct validity of the Activity Card Sort (modified) in measuring activity resumption after stem cell transplantation.

OBJECTIVE We assessed the psychometrics of a self-administered survey modification of the Activity Card Sort (modified; ACSm) when used to track activity resumption after stem cell transplantation (SCT). METHOD Thirty-six participants completed the ACSm for a descriptive pilot study of recovery after SCT. Reliability was assessed by determining the longitudinal consistency of participants' designation of an activity as never done versus done previously and by calculating internal consistency. Construct validity was assessed by correlating the ACSm scores with measures of quality of life, performance status, and perceived cognitive impairment. RESULTS Participants gave consistent designations for 72% of items. Internal consistency of the total score was alpha > 0.86 at all assessments. The ACSm scores were correlated with quality of life (r = 0.51, p = .0019), functional well-being (r = 0.59, p = .0002), and performance status (r = 0.42, p = 0.011) and not associated with cognitive impairment (r = .22, p = .19). CONCLUSION The ACSm demonstrated provisional evidence of reliability, internal consistency, and construct validity.