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. 2009 Jan 26;30(9):2766–2788. doi: 10.1002/hbm.20708

Table V.

Corrected P‐values for correlations between hippocampal atrophy and various clinical covariates broken down by diagnosis

Left Right
MMSE AD 0.0994 0.226
MMSE MCI 0.104 0.0209
MMSE controls 0.334 0.605
Global CDR AD 0.00894 0.00377
Global CDR MCI 1 1
Global CDR controls 1 1
Sum of boxes CDR AD 0.0181 0.000230
Sum of boxes CDR MCI 0.0372 0.00923
Sum of boxes CDR control 0.194 0.475

Those in italics are deemed significant. The values of 1 (i.e., not significant) for the global CDR measurements arise because all MCI patients have a global CDR value of 0.5 and all controls have a global CDR of 0, so there is no within‐group variation with which to correlate atrophy.