Early atherosclerosis and cardiac autonomic responses to mental stress: a population-based study of the moderating influence of impaired endothelial function

Table 1 Characteristics of study participants

Variable	Min	Max	Mean	(SD)	N
Age in 2001, years	24.00	39.00	30.89	4.92	81
Baseline brachial diameter, mm	2.36	5.32	3.53	0.62	74
Flow-mediated dilatation, FMD, %	-0.26	23.43	6.78	5.00	74
Carotid intima-media thickness, IMT, mm	0.43	0.96	0.59	0.09	81
Baseline HR, bpm	46.30	94.48	71.63	9.30	75
Baseline RSA, log ms²	2.17	3.30	2.84	0.23	76
Baseline PEP, ms	74.00	128.67	96.94	11.17	75
HR reactivity score, bpm	-4.23	46.28	16.33	10.74	72
RSA reactivity score, log ms²	-0.88	0.34	-0.11	0.24	73
PEP reactivity score, ms	-44.33	5.30	-14.80	10.65	70
HR recovery score, bpm	-14.02	12.37	-2.03	4.84	71
RSA recovery score, log ms²	-0.49	0.64	0.01	0.18	72
PEP recovery score, ms	-17.33	17.00	2.20	6.27	70

HR = heart rate (bpm); RSA = respiratory sinus arrhythmia (log ms²); PEP = pre-ejection period (ms).

ISSN: 1471-2261