Table 2 Logistic regression model obtained from backward stepwise selection using Akaike Information Criterion (AIC)

	Estimate	Standard error	p Value
Intercept	−8.56	1.09	<0.001
Question 1A	1.02	0.54	0.060
Question 2A	0.84	0.43	0.051
Question 4A	2.53	0.54	<0.001
Question 5A	3.05	0.94	0.001
Question 6	1.89	0.41	<0.001
Question 8	0.77	0.41	0.060
Question 10	2.34	0.70	0.001
Question 11	−1.36	0.43	0.002
Residual deviance (df)	572.73 (469)
AIC	192.62