Table 2.

Comparison of angina pectoris attacks between the two groups of patients (x̅ ± s).

Groups	Number of cases	Attack times (times)		Duration (min)
		Before treatment	After treatment	Before treatment	After treatment
Control group	100	6.85 ± 0.85	4.28 ± 0.41*	2.79 ± 0.33	1.63 ± 0.14*
Study group	100	6.78 ± 0.76	2.17 ± 0.34*	2.83 ± 0.39	0.68 ± 0.08*
t-value		0.614	8.576	0.783	7.935
p-value		0.540	<0.001	0.435	<0.001

Note: Compared with the same group of patients before treatment, *p < 0.05.