Table 2.

Comparison of cardiac function index (mean ± standard deviation).

Time	Groups	Cases	CO (L/min)	CI (L·min−1·m−2)	LVEF (%)
Before treatment	The study group	49	3.32 ± 0.46	2.73 ± 0.39	37.79 ± 4.21
	The control group	49	3.19 ± 0.51	2.69 ± 0.42	39.05 ± 3.97
	t value		1.325	0.489	1.524
	P value		0.188	0.626	0.131
After treatment	The study group	49	4.69 ± 0.37	3.78 ± 0.29	54.48 ± 4.10
	The control group	49	4.18 ± 0.40	3.43 ± 0.32	49.98 ± 3.82
	t value		6.552	5.673	5.621
	P value		0.001	0.001	0.001