ReliabilityTEN-ITEM VERSION. Shah et al, reported alpha internal consistency coefficients of 0.87 to 0.92(at admission and discharge) for the original scoring system, and 0.90 to 0.93 for her revised scoring method. Wartski and Green retested 41 patients after a three-week delay. For35 of the 41, scores fell within 10 points; of the6 cases with the most discrepant scores, 2 could be explained.