Type of intervention	Example of intervention	Studies
1. Targeted client communication	Alerts or reminders Targeted health information	Baraz 2014; Cargill 2003; Cooney 2015; Giacoma 1999; Han 2016; Henriksson 2016; iChoose 2016; iDiD 2016; InformMe 2017; Jammalamadaka 2015; Kargar Jahromi 2016; Li 2014b; McGillicuddy 2013; Poorgholami 2016a; Potter 2016; Reese 2017; Reilly‐Spong 2015; Robinson 2014a; Robinson 2015; SUBLIME 2016; TAKE‐IT 2014
2. Untargeted client communication	Untargeted information to undefined population	‐‐
3. Client‐to‐client information	Peer group	‐‐
4. Personal health tracking	Client accesses own medical record Self‐monitoring of health data Active data capture by client	BALANCEWise‐HD 2011; BALANCEWise‐PD 2011; Durand 2000; Hardstaff 2002; Koprucki 2010; Kullgren 2015; Ong 2017; Rifkin 2013; Schulz 2007; Welch 2013; Williams 2017
5. Citizen based reporting	Reporting of public health events	‐‐
6. On‐demand information services to clients	Client look‐up of health information	Diamantidis 2015
7. Client financial transactions	Manage out‐of‐pocket expenses	‐
One study could not be classified (Halleck 2017) Eight studies used multiple strategies (e.g. targeted client communication and personal health tracking) (BalanceWise‐HD 2013; BRIGHT 2013; Ishani 2016; MESMI 2010; Navaneethan 2017; Russell 2011; Schmid 2016; Swallow 2016; White 2010)