Validity and Feasibility of the CRSR-FAST

Diagnostic agreement between the Coma Recovery Scale-Revised (CRS-R) and the CRSR For Accelerated Standardized Testing (CRSR-FAST). The CRS-R is a standardized neurobehavioral rating scale used to monitor recovery of consciousness. Total scores on the CRS-R range from 0 to 23 with high scores generally indicating greater recovery. Six subscales on the CRS-R are summed to provide the total score: auditory function, visual function, motor function, oromotor/verbal function, communication and arousal. Evidence of specific behaviors on these subscales provides a diagnosis of vegetative state, minimally conscious state (MCS), or emerged from MCS. The CRSR-FAST is an abbreviated version of the CRS-R. We tested concurrent validity by comparing CRS-R and CRSR-FAST diagnostic ratings using the simple kappa coefficient; values close to 0 indicate no agreement and values close to 1 indicate almost perfect agreement. We established an a priori threshold of ≥ 0.60 to indicate substantial validity

CRSR-FAST test-retest reliability using Mak's ρ. The CRSR-FAST was administered twice by 2 blinded raters. Mak's ρ values close to 0 indicate no agreement and values close to 1 indicate almost perfect reliability. We established an a priori threshold of ≥ 0.60 to indicate substantial reliability

CRSR-FAST interrupter reliability using Mak's ρ. The CRSR-FAST was administered twice by the same rater. Mak's ρ values close to 0 indicate no agreement and values close to 1 indicate almost perfect reliability. We established an a priori threshold of ≥ 0.60 to indicate substantial reliability