Table 3.

Comparison of myocardial bridge parameters between the myocardial bridge-coronary heart disease subgroup and the simple myocardial bridge subgroup

Parameter	Group		t/X2 value	P-value
	MB-CHD subgroup (n = 236)	Simple MB subgroup (n = 52)
MB type (Superficial /Deep)	125/111	38/14	7.016	0.008
Systolic compression (%)	50.28 ± 11.24	39.86 ± 12.08	7.326	0
Diastolic compression (%)	34.25 ± 10.20	24.74 ± 10.75	7.424	0
MCA systolic stenosis rate (%)	44.35 ± 9.43	32.92 ± 6.60	10.865	0

MB: Myocardial bridge; MCA: Mural coronary artery; CHD: Coronary heart disease.