Impact of specialized nursing outpatient case management on post-coronary artery bypass grafting patients

Table 2 Comparison of psychological status scores between the two groups (mean ± SD, scores)

Norm	Timing	Control group (n = 51)	Case management unit (n = 52)	t	P value
SDS score	Before intervention	57.01 ± 4.51	56.36 ± 4.85	0.704	0.483
	After intervention	48.78 ± 3.26a	42.95 ± 3.21a	9.145	0.000
SAS score	Before intervention	61.74 ± 4.05	62.07 ± 3.87	0.423	0.673
	After intervention	53.23 ± 3.45a	47.05 ± 3.21a	7.891	0.000

^aP < 0.05, compared with the group before intervention.

SDS: Self-rating depression scale; SAS: Self-rating anxiety scale.