Development and validation of a nomogram model for predicting the risk of pre-hospital delay in patients with acute myocardial infarction

Table 2 Results of univariate and multivariate Logistic regression analysis on risk of pre-hospital delay in development group

Variables	Univariate logistic regression		Multivariate logistic regression
	OR (95%CI)	P value	OR (95%CI)	P value
BMI	0.956 (0.867, 1.050)	0.35
Killip Grade 1	Reference
Killip Grade 2	1.061 (0.429, 2.464)	0.894
Killip Grade 3	3.143 (0.666, 16.536)	0.145
Killip Grade 4	4.714 (0.440, 103.073)	0.211
Timi Grade 0	Reference
Timi Grade 1	1.855 (0.501, 6.615)	0.337
Timi Grade 2	0.890 (0.294, 2.420)	0.826
Timi Grade 3	1.012 (0.474, 2.109)	0.975
Living alone	3.059 (1.138, 8.476)	0.027	4.654 (1.386, 16.957)	0.015
Daytime onset	Reference
Nighttime onset	2.831 (1.434, 5.853)	0.004	2.200 (0.968, 5.188)	0.064
Combined with atrial fibrillation	1.875 (0.520, 6.497)	0.317
Combined with hypertension	2.862 (1.493, 5.649)	0.002	1.990 (0.906, 4.473)	0.089
Combined with hyperlipidemia	2.467 (1.024, 5.957)	0.042	3.151 (1.095, 9.373)	0.035
Have a regular job	0.791 (0.395, 1.541)	0.497
Number of diseased coronary artery	1.109 (0.743, 1.656)	0.61
Marital status: married	Reference
Marriage: Divorced or widowed	0.792 (0.168, 2.864)	0.739
Marriage: Unmarried	0.704 (0.034, 5.648)	0.764
Prior history of AMI	3.361 (0.542, 26.068)	0.191
Family monthly income < 3000 yuan	Reference
The monthly income of the family = 3000–5000 yuan	0.922 (0.449, 1.872)	0.822
Family monthly income > 5000 yuan	1.560 (0.660, 3.636)	0.304
Type of residence: town	0.387 (0.201, 0.737)	0.004	0.576 (0.258, 1.281)	0.175
Complicated with cerebral infarction	1.691 (0.533, 5.112)	0.353
Age	1.043 (1.020, 1.069)	< 0.001	1.034 (1.004, 1.065)	0.027
Complicated with renal insufficiency	1.845 (0.668, 4.959)	0.225
Complicated with diabetes	3.211 (1.662, 6.278)	0.001	3.208 (1.466, 7.228)	0.004
Education level is junior high school or below	Reference
High school education	1.669 (0.766, 3.610)	0.193
Education level is university or above	0.417 (0.146, 1.035)	0.076
Smoking	0.404 (0.207, 0.771)	0.007	0.682 (0.279, 1.652)	0.395
Complicated with digestive system diseases	2.733 (1.154, 6.533)	0.022	3.937 (1.433, 11.236)	0.009
Complicated with heart failure	1.490 (0.478, 4.355)	0.471
Female sex	2.737 (1.309, 5.753)	0.007	1.419 (0.531, 3.776)	0.482
Drinking	0.841 (0.413, 1.659)	0.622
Payment method: medical insurance reimbursement	1.252 (0.347, 5.886)	0.747
Number of stents placed	1.300 (0.916, 1.856)	0.142

AMI: Acute myocardial infarction; BMI: Body mass index; OR: Odds ratio.