Table 2.

Comparison of vascular diameter, peak blood flow velocity, and vascular pressure between the two groups ($\overline{x}\pm s$).

Group	N	Vascular diameter (mm)		Peak velocity of blood flow (cm/s)		Vascular pressure (mmHg)
		Before nursing	After nursing	Before nursing	After nursing	Before nursing	After nursing
C group	50	4.43 ± 0.31	4.01 ± 0.12	12.85 ± 3.11	15.81 ± 4.22	0.04 ± 0.01	0.19 ± 0.05
R group	50	4.41 ± 0.35	4.86 ± 0.33	12.59 ± 3.44	18.83 ± 2.44	0.06 ± 0.01	0.12 ± 0.06
t		0.302	17.116	0.396	4.380	1.453	6.337
P		0.762	0.001	0.692	0.001	0.533	0.001