Correlation of increased corrected TIMI frame counts and the topographical extent of isolated coronary artery ectasia

Table 3 Linear, Multiple Linear and Non-linear Correlation Models of CTFC_index and Topographical Parameters

Model	Dependent Variable	Independent Variables	Equation	Ra²	AIC	RSD
Linear model
1	CTFC _index	D_index	CTFC_index = −9.042 + 7.619* D_index	0.353	392.9	12.6
2	CTFC _index	ER_index	CTFC_index = −16.246 + 30.404* ER_index	0.410	385.7	12.0
3	CTFC _index	LD_index	CTFC_index = 16.360 + 0.444* L_index	0.242	405.0	13.6
4	CTFC _index	EEA_index	CTFC = 17.407 + 0.065EEA_index	0.444	381.1	11.6
Multiple linear model
1	CTFC _index	ER_index LD_index	CTFC = −18.970 + 24.842ER_index + 0.245LD_index	0.466	379.0	11.3
2	CTFC _index	D_index LD_index	CTFC = −14.396 + 0.285LD_index + 6.091D_index	0.436	393.3	11.7
3	CTFC _index	D_index ER_index LD_index EEA_index	CTFC = 17.248-3.935D_index + 19.005ER_index-0.354LD_index + 0.092EEA_index	0.481	378.7	11.0
Nonlinear model
1	CTFC _index	EEA _index	CTFC = 34.305-0.035EEA_index + 1.22⁻⁴EEA_index^2	0.526	367.8	10.7
2	CTFC _index	EEA _index	CTFC = 18.208 + 0.122EEA_index-2.94⁻⁴EEA_index^2+ 3.13⁻⁷EEA^3	0.546	363.5	10.4

Ra² Adjusted R square, AIC Akaike information criterion, RSD Residual standard deviation

ISSN: 1471-2261