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. Author manuscript; available in PMC: 2011 Apr 1.
Published in final edited form as: Alzheimer Dis Assoc Disord. 2010 Apr–Jun;24(2):138–142. doi: 10.1097/WAD.0b013e3181b76415

Table 3. Test-Retest Reliability Coefficients and Reliable Change Index Scores Based on Standard Errors of Measurement for CERAD NC Sample.

Time Interval Test-Retest Reliability SEm SEdiff RC (90%) CI
Baseline to Visit 1 .80 4.53 6.41 ± 10.51
Baseline to Visit 2 .65 6.67 9.43 ± 15.47
Baseline to Visit 3 .76 5.12 7.24 ± 11.87
Baseline to Visit 4 .69 6.12 8.66 ± 14.20
Baseline to Last Visit .74 5.52 7.80 ± 12.80

Note. Test-retest reliability coefficients based on the correlation between the mean CERAD Total Score at baseline, (M = 79.8, SD = 9.4), and each subsequent visit.

CERAD = Consortium to Establish a Registry for Alzheimer's Disease; NC = normal control; SEm = standard error of measurement; SEdiff = standard error of difference; RC = reliable change; CI = confidence interval.