Table 4.

Aim 3 secondary data elements and data collection plan (data collected 6 months pre- and postexposure to implementation intervention).

Construct and variables			Measure		Data source
Secure messaging use
	Registration	Number of patients registered		VSSCa Compass PACTb data cubes or VSSC Transformation Initiative data cube or Veteran and Consumer Health Informatics Office CDWc data request
	Authentication	Number of patients authenticated
	Opted-in	Number of patients opted in
	Inbound SMd	Number of inbound messages
	Outbound SM	Number of outbound messages
MHVe Rx refills use
	Prescription refill orders	Number of prescription refill orders		VSSC Transformation Initiative data cube or Veteran and Consumer Health Informatics Office data request
Telephone use
	Encounters	Number of encounters		VSSC Compass PACT data cubes
Home telehealth use
	Encounters	Number of encounters		CDW Telehealth Visits Report, including secondary codes for Home Telehealth, Clinical Video, Store & Forward
	Visits	Number of visits
	Unique patients	Number of unique patients
VetLink kiosk use
	Check-in	Number of patients checked in		Local VetLink Kiosk administrative data report
	Demographic update	Number of patients who updated demographic data
	Assistance required	Number of patients requiring help at kiosk

^aVSSC: VHA Support Service Center

^bPACT: Patient-Aligned Care Team.

^cCDW: Corporate Data Warehouse.

^dSM: secure messaging.

^eMHV: My HealtheVet.