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. Author manuscript; available in PMC: 2009 Apr 15.
Published in final edited form as: Neuroimage. 2008 Jan 5;40(3):1181–1194. doi: 10.1016/j.neuroimage.2007.12.040

Table 4.

ANCOVA Results for the Breath-Hold Task

Median Percent Signal Change
Effect df F-Value ProbF
Age 1, 10.0 8.16 0.017
Dx 1, 14.4 8.97 0.009
SMOK 1, 14.3 12.75 0.003
Dx*SMOK 1, 14.2 0.81 0.383
Mean Percent Signal Change
Effect df F-Value ProbF
Age 1, 8.5 5.77 0.0411
Dx 1, 13.6 8.27 0.0125
SMOK 1, 13.5 9.87 0.0075
Dx*SMOK 1, 13.3 0.34 0.5719
Activation Volume
Effect df F-Value ProbF
Age 1, 10.1 1.86 0.203
Dx 1, 09.6 3.21 0.105
SMOK 1, 09.7 0.62 0.448
Dx*SMOK 1, 09.4 0.06 0.818
Mean Time to Peak
Effect df F-Value ProbF
Age 1, 10.7 0.12 0.7366
Dx 1, 07.9 0.34 0.5740
SMOK 1, 08.0 1.81 0.2157
Dx*SMOK 1, 07.7 0.06 0.8137
Mean Time to Trough
Effect df F-Value ProbF
Age 1, 12.7 0.26 0.6177
Dx 1, 13.7 0.19 0.6682
SMOK 1, 13.7 0.18 0.6774
Dx*SMOK 1, 13.8 3.05 0.1029