Table 5.

Conjoint analysis of sub groups | Levels 2 and 3 compared to level 1

Attribute	Level	LogLike Diff.
		Total	Patient group	Age	Portal use experience	Gender
Accessibility	1. Portal can be accessed via a computer (laptop and/or desktop)	*
	2. Portal can be accessed via a tablet (for example iPad)	−0.922	0.146	−0.301	0.376	−0.360
	3. Portal can be accessed via a smartphone (for example iPhone)	−1.086	0.228	−0.494	0.441	−0.549
Login	1. Username and password	*
	2. DigiD with SMS verification	0.004	−0.064	−0.200	0.358	0.127
	3. Username, password and SMS verification	0.018	0.058	−0.124	0.236	0.038
Interoperability	1. No export of data	*
	2. Export of data to non-interoperable format (e.g. PDF)	0.259	0.050	−0.217	0.297	−0.101
	3. Export of data to interoperable format (e.g. Continuous Care Document)	0.165	−0.008	0.169	0.335	0.140
Content	1. Reports and basic information (e.g. medication overviews)	*
	2. Reports and basic information and professional summary	0.312	−0.031	−0.219	0.347	−0.099
	3. Complete uncensored medical file	0.303	0.069	−0.236	0.362	−0.045
Number of providers	1. Contains information about one provider (e.g. hospital or general practitioner)	*
	2. Contains information about multiple providers (e.g. hospitals and general practitioner)	0.290	−0.018	−0.120	0.304	−0.113
Patient-provider communication	1. No possibility to ask online questions	*
	2. Possibility to ask questions about medical data in the portal or about earlier visits	0.684	−0.003	−0.212	0.399	−0.158
	3. Online in-patient consult	0.539	0.005	−0.150	0.265	−0.039

* The asterisk indicates the base value