Table 4 The multivariate linear regression analysis of the factors affecting FIS

Intercept

5.87 (1.05–14.18)

1.14

4.87

= 0.011

 Age/years

0.02 (− 0.34–0.37)

0.23

0.09

= 0.928

 Heart rate (beat/min)

0.13 (− 0.15–0.41)

0.12

0.96

= 0.343

 Chest pain duration (h)

1.04 (0.28–1.80)

0.41

2.75

= 0.009

 APG (mg/dl)

0.08 (0.04–0.11)

0.02

4.09

< 0.001

 Peak CK-MB (ng/ml)

0.16 (0.08–0.24)

0.04

3.99

< 0.001

 Sum ST elevation

0.71 (0.38–1.04)

0.16

4.35

< 0.001

 Max ST elevation

2.57 (1.03–4.10)

0.76

3.38

= 0.002

 Echo WMSI

-1.73 (− 5.29–1.95)

0.91

0.84

= 0.624

 CMR WMSI

1.89 (1.01–3.51)

0.18

4.62

= 0.005

 Infarction site (anterior)

4.07 (− 2.84–10.98)

3.40

1.29

= 0.240