The impact of myocardial infarction on basal and stress-induced heart rate variability and cortisol secretion in women: A pilot study.

The correlation was not significant between STAI-SA and RSA in the whole sample, r (51) = −0.15, p = .30, CI 95% [-0.41, 0.13], nor the NoMI group, r (27) = 0.06, p = .76, CI 95% [-0.33, 0.43], but close to significance for the MI group, r (23) = −0.39, p = .053, CI 95% [-0.69, 0.02] (see Fig. 8 ).

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However, group-specific correlations failed to reach significance [MI group, r (23) = 0.22, p = .29, CI 95% [-0.21, 0.58]; NoMI group, r (31) = 0.53, p = .002, CI 95% [0.21, 74]].

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A statistical trend suggests that the difference started emerging earlier: at T 7 , the MI group ( M = 0.38, SE = 0.02) showed reduced cortisol values compared to the NoMI group ( M = 0.45, SE = 0.03); mean difference of 0.07, BCa 95% [0.01, 0.12], t (26) = 2.00, p = .062, Hedges’ g = 0.69, CI 95% [−0.06, 1.44].

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