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Table 2: Percentage parameter change (mean ± SD) on administration of O₂ for the young and elderly groups
Δ = (O₂/no O₂ − 1) × 100 Young P Value, Δ Young = 0 Elderly P Value, Δ Elderly = 0
T2′ Cortex O₂ 1.1 ± 8.8 P = .34 −2.5 ± 6.6 P = .245
T2′ GM frontoparietal O₂ 0.0 ± 4.4 P = .73 1.1 ± 5.8 P = .522
T2′ Thal O₂ −1.8 ± 4.0 P = .52 1.5 ± 16.4 P = .674
T2′ WM O₂ 0.3 ± 3.5 P = .68 −0.1 ± 4.2 P = .784
T2* Cortex O₂ 0.4 ± 2.4 P = .3 −0.8 ± 4.1 P = .498
T2* GM frontoparietal O₂ 0.7 ± 1.4 P = .09 0.3 ± 3.6 P = .452
T2* Thal O₂ 0.3 ± 3.3 P = .91 1.4 ± 9.6 P = .756
T2* WM O₂ −0.7 ± 4.3 P = .68 −0.2 ± 2.5 P = .596
T2 Cortex O₂ 0.4 ± 1.5 P = .38 4.1 ± 7.6 P = .033^{^a}
T2 GM frontoparietal O₂ −8.1 ± 8.2 P = .01^{^a} 8.9 ± 13.8 P = .005^{^a}
T2 Thal O₂ 0.3 ± 10.4 P = .57 −0.8 ± 6.4 P = .812
T2 WM O₂ −1.9 ± 3.4 P = .11 1.8 ± 3.3 P = .04^{^a}
PASL_O₂ −2.4 ± 3.0 P = .02^{^a} −2.5 ± 16.5 P = .539

Note:—Thal indicates thalamus; Cortex, frontoparietal paramedian.
↵a Significant.