Table 3.

Comparison of psychological status of two groups before and after intervention（$\begin{array}{l}─\\ x\end{array}$ ±s）.

Item		Observation group（n = 41)	Control group (n = 41)	t	P
SAS	Before intervention	64.22 ± 2.87	64.20 ± 2.76	0.039	0.969
	After intervention	54.63 ± 2.1*	64.22 ± 2.78	17.895	＜0.001
SDS	Before intervention	14.12 ± 2.12	14.41 ± 1.69	0.691	0.492
	After intervention	7.73 ± 1.36*	13.71 ± 1.84	16.763	＜0.001

Note: *: The comparisons of indexes within-group was statistically significant. P＜0.05. SAS: Self-rating anxiety scale, SDS: Self-rating depression scale.