Table 3. Logistic regression model for the use of epinephrine for anaphylaxis.

Characteristics		OR (95% CI)	P value	P trend
Age (yr)
	< 7	0.34 (0.15–0.67)	0.004	< 0.001
	7–12	0.56 (0.28–1.03)	0.072
	13–18	0.79 (0.45–1.33)	0.386
	19–65 (reference)	1.00 (reference)
	> 65	1.24 (0.92–1.65)	0.150
Past history
	Anaphylaxis	0.81 (0.52–1.24)	0.348
	Cardiovascular disease	1.01 (0.82–1.25)	0.914
Miscellaneous
	City dweller	1.10 (0.83–1.46)	0.504
	Upper income class	0.94 (0.77–1.14)	0.510
	Larger hospital (300 or more)	0.99 (0.80–1.23)	0.927

OR, odds ratio; CI, confidence interval.