Table 3.

Degree of Involvement of Each Clinical Factor in the Change From Pre- to Post-LVEF

Dependent variable	Univariate regression analysis				Multiple regression analysis (R2=0.252)
	β	St. β	95% CI	P value	β	St. β	95% CI	P value	VIF
Age	0.101	0.267	−0.002, 0.203	0.054	0.071	0.188	−0.029, 0.171	0.160	1.059
Body mass index	−0.207	−0.210	−0.479, 0.065	0.132	−0.141	−0.143	−0.418, 0.135	0.309	1.185
HbA1c	−0.292	−0.066	−1.530, 0.945	0.637	0.221	0.050	−1.034, 1.477	0.724	1.224
Chest pain (/month)	0.079	0.174	−0.047, 0.205	0.212	0.022	0.048	−0.102, 0.145	0.725	1.115
Current smoker	1.437	0.125	−1.779, 4.653	0.374	1.267	0.110	−1.727, 4.261	0.399	1.020
Change from pre- to post-total QCA areaA	0.027	0.429	0.011, 0.042	0.001	0.022	0.352	0.004, 0.040	0.018	1.257
Constant	–	–	–	–	−2.589	–	−12.807, 7.628	0.612

^ATotal quantitative coronary angiography (QCA) area was defined as the area of the left anterior descending plus left circumflex plus right coronary arteries. β, regression coefficient; CI, confidence interval; LVEF, left ventricular ejection fraction; St. β, standardized regression coefficient; VIF, variance inflation factor.