Factors associated with the rates of coronary artery bypass graft and percutaneous coronary intervention

Table 2 Regression analysis of CABG and PCI rates

Variables	CABG rate			PCI rate
	Coefficient	95% CI		Coefficient	95% CI
		Lower bound	Upper bound		Lower bound	Upper bound
Baseline (intercept)	9.095	.434	17.756	170.672	−4.021	345.365
District-level
Deprivation index	−.272**	−.457	−.087	3.077	−.403	6.556
Log (population size)	−.378	−2.085	1.329	−5.943	−37.995	26.109
No. of primary care physicians per 100,000	.007	−.025	.039	.118	−.244	.480
PCI rate (CABG rate¹)	.002	−.010	.013	−1.478	−4.462	1.506
Hospital service area-level
No. of CABG (PCI²)	.001	.000	.002	−.002	−.004	.000
No. of cardiothoracic surgeons in general hospitals per 100,000	−.354	−2.054	1.346	−65.534**	− 106.809	− 24.260
No. of cardiologists in general hospitals per 100,000	.141	−.836	1.117	2.644	−18.122	23.411
No. of beds in general hospitals per 1000	−.386	−1.090	.317	59.406***	37.910	80.902
R²	.115			.402

**p < 0.01, ***p < 0.001, CABG and PCI rates are per 100,000 persons aged 20 and over. 1. For the regression analysis with the dependent variable of PCI rate, CABG rate was used as an independent variables. 2. For the regression analysis with the dependent variable of PCI rate, the number of PCI in the hospital service areas was used

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