Evaluation of the autonomic nervous system in patients with essential tremor

Table 2 Heart rate variability (HRV) tests in the study groups

	Group	Mean	Std. Devi	t	sig
Heart rate variability (HRV) tests
E/I ratio	Control	1.26	0.060	3.553	0.001
E/I ratio	ET patients	1.15	0.131	3.553	0.001
Valsalva ratio	Control	1.28	0.038	3.760	0.000
Valsalva ratio	ET patients	1.14	0.155	3.760	0.000
30:15 ratio	Control	1.07	0.023	3.561	0.00
30:15 ratio	ET patients	1.02	0.071	3.561	0.00

Independent sample t-test. E/I: expiratory/inspiratory ratio. HRV: heart rate variability