Patients' characteristics and blood pressure and heart rate values while supine and during head-up tilt.

Age (years); AAN: Autoimmune autonomic neuropathy; BMI: body mass index; DBP diastolic blood pressure (mmHg); Delta (Δ): differences between HUT and supine values; Dis Hx: disease history (years); Edu: years of education; F: female; HR: heart rate (b/m); HUT: mean value during the last minute of head-up tilt; M: male; PAF: pure autonomic failure; Pt: patient; SBP systolic blood pressure (mmHg); Supine: mean value during the last 5 minutes of supine rest.