Skip to main content
. Author manuscript; available in PMC: 2009 Jun 8.
Published in final edited form as: Neuroimage. 2005 Nov 21;29(2):368–382. doi: 10.1016/j.neuroimage.2005.08.065

Table 3.

Here we present the zero lag correlation (Pearson’s) coefficients for the six comparisons between HbX and fMRI for study II

Subject HbO:ASL HbT:ASL HbR:ASL
F 0.74 (3 × 10−06) 0.81 (6 × 10−08) −0.15 (4 × 10−01)
G 0.95 (1 × 10−15) 0.98 (1 × 10−22) 0.71 (1 × 10−05)
H 0.90 (2 × 10−11) 0.92 (4 × 10−13) −0.15 (4 × 10−01)
I 0.93 (8 × 10−14) 0.89 (4 × 10−11) 0.30 (1 × 10−01)
J 0.50 (5 × 10−03) 0.64 (2 × 10−03) 0.19 (4 × 10−01)
ALL 0.83 (1 × 10−08) 0.91 (4 × 10−12) 0.13 (5 × 10−01)
HbO:1/BOLD HbT:1/BOLD HbR:1/BOLD
F 0.80 (1 × 10−07) 0.55 (2 × 10−03) 0.75 (2 × 10−06)
G 0.63 (2 × 10−04) 0.55 (2 × 10−03) 0.78 (6 × 10−07)
H 0.14 (5 × 10−01) 0.05 (8 × 10−01) 0.57 (6 × 10−04)
I 0.50 (5 × 10−03) −0.10 (6 × 10−01) 0.91 (4 × 10−12)
J 0.25 (2 × 10−01) 0.49 (6 × 10−03) 0.59 (6 × 10−04)
ALL 0.62 (3 × 10−04) 0.30 (1 × 10−01) 0.80 (9 × 10−08)

The values in parentheses are the P values for each coefficient. For all calculations, the window of 0 –15 s was used. The correlations for the group-averaged responses show a significantly better correlation between the HbT:ASL responses compared to the HbO:ASL or HbR:ASL responses. As was seen in study I, the BOLD:HbR correlations were also much more statistically significant then the other two hemoglobin measures.