Table 3.

AN parameters of IGT patients and age-matched control subjects.

	Control	Patients with IGT
Heart rate (HR) variation during deep breathing (1/min)	16 ± 7	11 ± 8*
Valsalva ratio	1.7 ± 0.3	1.2 ± 0.1**
30/15 ratio	1.3 ± 0.3	1.2 ± 0.1
Systolic BP fall after standing up (mmHg)	8 ± 8	6 ± 7
Diastolic BP increase after sustained handgrip (mmHg)	11 ± 6	14 ± 6
AN score	2.4 ± 1.2	2.7 ± 1.3

Values are represented as mean ± SD. Values are considered statistically significantly different at P < 0.05 (*), P < 0.0001 (**) compared with the control group. n = 18 in each group.

IGT, impaired glucose tolerance; 30/15 ratio, immediate HR response to standing; BP, blood pressure; AN, autonomic neuropathy.