Table 2.

Logistic regression analyses comparing decision tree availability and expert level across three scenarios

	Expert vs. novice			With tree vs. without tree
	OR (95% CI)a	p value		OR (95% CI)	p value
Scenario 1			Scenario 1
Without tree	3.3 (1.1, 10.1)	.03	Novice	1.8 (0.8, 3.9)	.15
With tree	0.8 (0.3, 2.0)	.56	Expert	0.4 (0.1, 1.4)	.15
Scenario 2			Scenario 2
Without tree	0.3 (0.1, 3.2)	.10	Novice	0.7 (0.3, 1.5)	.30
With tree	1.0 (0.3, 3.2)	.97	Expert	2.0 (0.4, 10.0)	.39
Scenario 3			Scenario 3
Without tree	3.3 (1.2, 8.8)	.02	Novice	4.4 (1.8, 10.4)	.001
With tree	1.2 (0.6, 3.6)	.70	Expert	1.7 (0.5, 5.4)	.40

^a OR odds ratio, CI confidence interval