Table 4.

Probit Models

Attribute or Variable	All Scenarios		Ambiguous Physical/Psychological Scenario		Minor Physical Scenario		Urgent Physical Scenario
^a P<.001.
^b P<.05.
Note: ρ² is a measure of goodness of fit of the discrete choice model. It is given by 1 − LL(β̂)/LL(0), where LL(β̂) is the log-likelihood of the reported models and LL(0) is the log-likelihood of a constant-only model.
Generic questionnaire
Attribute	Coefficient	t	Coefficient	t	Coefficient	t	Coefficient	t
Waiting time, days	−0.114^a	−21.80	−0.053^a	−5.81	−0.074^a	−7.72	−0.210^a	−21.82
Cost, £	−0.032^a	−40.22	−0.032^a	−23.12	−0.044^a	−29.79	−0.023^a	−16.58
Doctor knows you well	0.192^a	12.23	0.302^a	10.62	0.210^a	7.24	0.130^a	4.75
You get a choice of appointment times	0.105^a	6.73	0.031	1.11	0.120^a	4.09	0.137^a	5.03
Doctor is warm and friendly	0.134^a	8.55	0.145^a	5.29	0.187^a	6.42	0.070^b	2.59
Doctor gives you a thorough physical examination	0.643^a	39.28	0.756^a	25.50	0.599^a	19.50	0.679^a	23.40
Constant	−0.004	−0.20	−0.004	−0.12	−0.023	−0.70	0.020	0.62
Variable	Value		Value		Value		Value
Number of responses	9,953		3,343		3,243		3,367
Number of respondents	628		421		409		425
ρ²	0.303		0.326		0.374		0.321
Patient-centered care questionnaire
Attribute	Coefficient	t	Coefficient	t	Coefficient	t	Coefficient	t
Waiting time, days	−0.119^a	−22.08	−0.055^a	−5.65	−0.069^a	−7.30	−0.229^a	−23.04
Cost, £	−0.035^a	−43.14	−0.036^a	−25.48	−0.043^a	−29.34	−0.029^a	−20.00
Doctor knows you well	0.305^a	18.70	0.317^a	10.88	0.359^a	12.03	0.301^a	10.39
Doctor is interested in your ideas	0.254^a	15.87	0.292^a	10.26	0.305^a	10.50	0.225^a	7.86
Doctor asks about your social and emotional well-being	0.216^a	13.01	0.420^a	13.91	0.195^a	6.53	0.075^b	2.59
Doctor involves you in decision making	0.207^a	13.06	0.273^a	9.86	0.225^a	7.92	0.156^a	5.44
Constant	0.002	0.12	−0.004	−0.11	0.006	0.16	0.042	1.25
Variable	Value		Value		Value		Value
Number of responses	9,009		2,966		3,036		3,007
Number of respondents	565		372		381		377
ρ²	0.287		0.308		0.362		0.317