Table 3.

Multivariable logistic regression analysis for on-scene time over 30 min

	OR (95% CI)	p Value
Age (years)	1.00 (0.99 to 1.01)	0.32
Gender
Male	0.92 (0.80 to 1.05)	0.22
Disease name as diagnosed at emergency departments
Cardiopulmonary arrest	0.30 (0.24 to 0.38)	<0.001
Trauma	1.19 (0.94 to 1.51)	0.15
Intoxication	1.82 (1.15 to 2.87)	0.011
Other external cause	0.58 (0.33 to 1.02)	0.058
Central neurological disease	0.48 (0.37 to 0.61)	<0.001
Respiratory disease	0.63 (0.49 to 0.80)	<0.001
Cardiovascular disease	0.37 (0.28 to 0.48)	<0.001
Gastrointestinal disease	0.68 (0.51 to 0.91)	0.010
Minor disease	1.65 (1.06 to 2.57)	0.023
Time of the day
Night shift	1.15 (0.96 to 1.36)	0.068
Evening shift	0.98 (0.84 to 1.15)	0.24
Day shift	1.00
Phone calls to hospitals	2.57 (2.43 to 2.72)	<0.001
Geographical area
North	3.20 (2.65 to 3.87)	<0.001
Middle	2.20 (1.85 to 2.61)	0.003
South	1.00