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

Table 5 Comparison of knowledge mastery scores between the two groups (mean ± SD, scores)

Norm	Timing	Control group (n = 51)	Case management unit (n = 52)	t	P value
Understanding of coronary heart disease	Before intervention	17.85 ± 3.02	18.04 ± 2.88	0.327	0.744
	After intervention	21.12 ± 2.11a	23.65 ± 1.74a	6.645	0.000
Necessity of taking medicine regularly	Before intervention	16.52 ± 2.47	16.41 ± 2.58	0.221	0.826
	After intervention	21.53 ± 2.11a	23.74 ± 1.06a	6.736	0.000
Key points of self-care after CABG	Before intervention	14.24 ± 2.69	13.97 ± 3.78	0.417	0.678
	After intervention	20.14 ± 3.23a	23.12 ± 1.58a	5.965	0.000
Precautions after CABG surgery	Before intervention	18.85 ± 2.25	19.04 ± 2.11	0.442	0.659
	After intervention	22.05 ± 1.07a	23.74 ± 0.77a	9.214	0.000

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

CABG: Coronary artery bypass grafting.