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iCEB according to gender and age. (A) Index of cardio‐electrophysiological balance (iCEB) according to sex. Females have a significantly increased value of iCEB compared to males (P < 0.0001). (B) iCEB according to different age quartiles. Data demonstrating age has no major influence on iCEB. Bonferroni's posttest indicated that no single age group significantly differed from another age group.
