Table 3.

Logistic Regression Models for Situation 1—Low Chance of Survival

	Model 1		Model 2
	Parameter (Standard Error)	Odds Ratio (Confidence Limits)	Parameter (Standard Error)	Odds Ratio (Confidence Limits)
Intercept	−1.536 (1.253)	0.22 (0.09, 2.51)	−1.194 (1.464)	0.30 (0.02, 5.35)
Patient age	0.004 (0.013)	1.00 (0.98, 1.03)	0.0007 (0.016)	1.00 (0.97, 1.03)
Patient education level	−0.080 (0.354)	0.92 (0.46, 1.85)	0.457 (0.414)	1.58 (0.70, 3.56)
Patient knowledge of ACP	0.104 (0.075)	1.11 (0.96, 1.29)	0.080 (0.090)	1.08 (0.91, 1.29)
Study site	0.392 (0.380)	1.48 (0.70, 3.11)	0.374 (0.457)	1.45 (0.59, 3.56)
Surrogate education	0.062 (0.3197)	1.06 (0.57, 1.99)	0.121 (0.373)	1.13 (0.54, 2.35)
Surrogate knowledge	0.119 (0.074)	1.13 (0.97, 1.30)	0.108 (0.085)	1.11 (0.94, 1.32)
Intervention group	*1.653 (0.346)	5.22 (2.65, 10.28)	0.123 (3.070)	1.13 (0.003, 464.21)
Interaction
Age × group			0.015 (0.028)	1.02 (0.96, 1.07)
Patient education × group			*−2.118 (0.808)	0.12 (0.25, 0.59)
Patient knowledge × group			0.040 (0.172)	1.041 (0.74, 1.46)
Site × group			0.104 (0.848)	1.109 (0.21, 5.85)
Surrogate education × group			0.115 (0.779)	1.122 (0.24, 5.16)
Surrogate knowledge × group			0.087 (0.177)	1.091 (0.77, 1.54)

^*P < .05