Correlates of Delayed Initial Contact to Emergency Services among Patients with Suspected ST-Elevation Myocardial Infarction

Table 5

Multivariate, stepwise logistic regression of predictors of DTB time within 90 minutes (n = 268).

Independent variable	B	SE	Wald’s χ^2	df		OR	95% CI
Gender (reference: male)	−1.01	0.52	3.78	1	0.05	0.36	(0.13–1.01)
Disability	1.23	0.50	5.93	1	0.02	3.41	(1.28–9.12)
Nondiagnostic ECG	2.53	0.44	11.88	1	0.001	6.62	(5.30–29.74)

Final model statistics: χ² (5) = 20.08, , Cox and Snell R² = 0.07, and Nagelkerke R² = 0.13; DTB = door‐to‐balloon; ECG = electrocardiogram.