Table 1. Patient characteristics.

	Group A	Group B	Group C	ANOVA
Age (years)	68.2±10.6	69.1±10.3	69.6±9.6	p _ 0.90
Body weight (kg)	57.4±6.0	55.3±5.9	56.2±7.8	p _ 0.70
Heart rate (beats per min)	53.8±7.6	55.7±7.7	59.0±12.2	p _ 0.46
Data acquisition time (s)	10.4±0.9	10.4±1.1	10.1±1.4	p _ 0.48

Data are the mean ± standard deviation. ANOVA, analysis of variance.