Table 8.

Multivariable logistic regression model for satisfaction

	I can comprehend the information that the health care providers supplied for the surgery		The information that the health care providers supplied will help me make decisions for the surgery		I am satisfied with the informed consent process for the surgery
	Odds ratio	95% CI	Odds ratio	95% CI	Odds ratio	95% CI
Intervention group (reference group = control group)	3.299***	1.614–6.746	3.246**	1.567–6.727	3.702***	1.747–7.843
Age (reference group = age < 36)	0.703	0.326–1.515	0.379*	0.175–0.822	0.371*	0.168–0.821
Sex (reference group = female)	0.552	0.260–1.175	0.770	0.359–1.653	0.578	0.264–1.264
Education (reference group = <high school)	1.243	0.412–3.752	1.230	0.414–3.654	1.119	0.379–3.303
Injury severity score (ISS) (reference group = ISS≦4)	0.654	0.268–1.595	0.849	0.353–2.039	1.031	0.421–2.523
Transferred (reference group = non-transferred)	1.307	0.578–2.955	0.883	0.383–2.036	0.669	0.287–1.563
Arrived time (reference group = other)	1.222	0.582–2.568	0.972	0.459–2.058	0.923	0.430–1.981
Physician (reference group = physician A)	0.733	0.313–1.715	0.904	0.381–2.145	0.938	0.387–2.273
Baseline knowledge score (BKS) (reference group = BKS < 60)	0.965	0.453–2.057	1.195	0.557–2.567	1.134	0.520–2.473
Likelihood ratio test for model	χ2 = 19.41; P = 0.022		χ2 = 22.13; P = 0.009		χ2 = 24.83; P = 0.003

*p < 0.05; **p < 0.01; ***p < 0.001. Sample size of regression model = 142