Table 3 Multivariate analysis of in‐hospital death, including frequent ventricular extrasystoles and, separately, significant heart rate variability parameters in the logistic regression models.

	Odds ratio (95% CI)	p Value
First model
Age >70 years	8.60 (1.02 to 72.3)	0.047
⩾10 extrasystoles/h	5.13 (1.16 to 22.6)	0.031
SDNNi <39 ms	4.43 (1.01 to 19.4)	0.048
Second model
Age >70 years	8.04 (0.96 to 68.5)	0.056
⩾10 extrasystoles/h	5.27 (1.19 to 23.3)	0.029
LF <15.7 ms	4.49 (1.02 to 19.7)	0.047
Third model
Age >70 years	7.44 (0.86 to 64.3)	0.068
⩾10 extrasystoles/h	4.29 (0.96 to 19.1)	0.056
LF:HF ratio <1.12	2.76 (0.61 to 12.4)	0.18

HF, high frequency; LF, low frequency; SDNNi, mean of the standard deviations of RR intervals of all 5 min segments in 24 h.