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FIGURE 4. (A and C) Linear regression analysis (A) showed good correlation between T1 and T2 poststress EFs (y = 0.968x + 1.428; r = 0.95; SEE = 0.03; P < 0.0001), whereas Bland–Altman method (C) showed good agreement between the 2 sets of measures. (B) Similarly, linear regression analysis showed good correlation between T1 and T2 resting EFs (y = 0.961x + 1.641; r = 0.94; SEE = 0.03; P < 0.0001). (D) Bland–Altman method showed shift in mean value of difference of +0.51 ± 4.13.
