. Author manuscript; available in PMC: 2009 Aug 17.

Published in final edited form as: J Clin Exp Neuropsychol. 2008 Sep 27;31(5):605–610. doi: 10.1080/13803390802375557

TABLE 3.

WRAT-3 reliable change index values for each diagnostic group and ethnicity

	N	M_diff	SD_diff	95% RCI	90% RCI
Control	200	−0.50	2.03	−4.48, 3.48	−3.84, 2.84
MCI	137	−0.01	2.36	−4.64, 4.62	−3.89, 3.87
AD	41	−0.83	2.64	−6.00, 4.34	−5.17,3.51
Caucasian	315	−0.27	2.24	−4.66,4.12	−3.95, 3.41
African-Ameri can	63	−0.78	2.18	−5.05, 3.49	−4.37, 2.81

Note. RCI = reliable change index. WRAT-3 = Wide Range Achievement Test–Third Edition; M_diff = mean change in score between Time 1 and Time 2; SD_diff = standard deviation of the M_diff; MCI = mild cognitive impairment; AD = Alzheimer’s disease. Control, MCI, and AD groups refer to those who received the diagnosis at the first of two consecutive, annual consensus diagnostic team meetings.