Table 1.

Definition of ANS profile scores and descriptive statistics, CHAMACOS, n = 278.

ANS profile	RSA reactivity	PEP reactivity	n (%)
Co-activation of PNS and SNS	+	−	54 (19.4)
Co-inhibition of PNS and SNS	−	+	77 (27.7)
Reciprocal PNS activation, SNS not activated	+	+	41 (14.8)
Reciprocal PNS withdrawal, SNS activation	−	−	106 (38.1)

ANS, autonomic nervous system; PNS, parasympathetic nervous system; SNS, sympathetic nervous system; RSA, respiratory sinus arrhythmia; PEP, preejection period; +, positive reactivity score; −, negative reactivity score; ANS reactivity score, mean challenge minus resting condition.