Table 1.

Questionnaire constructs and their measurement items scored using a 5-point Likert scale.

Construct, item code			Item description [citations of validated studies]		Score, mean (SD)a
Information quality (IQ)
	IQ1	Information provided by the BPb Assistant is relevant for my needs [28,29,32].		4.310 (0.745)
	IQ2	Information provided by the BP Assistant is sufficient for my needs [28,32].		4.318 (0.757)
	IQ3	Information provided by the BP Assistant has been updated in a timely manner [28,32].		3.953 (0.879)
System quality (SysQ)
	SysQ1	The BP Assistant is easy to learn [29].		4.519 (0.572)
	SysQ2	The BP Assistant is easy to use [28,29].		4.481 (0.624)
Service quality (SerQ)
	SerQ1	The health manager can resolve problems that I encountered when using the BP Assistant [28].		4.271 (0.745)
	SerQ2	The health manager gives me individual guidance in the follow-up phone calls [28,32].		4.085 (0.778)
Perceived usefulness (PU)
	PU1	The BP Assistant is of benefit to me [26].		4.202 (0.730)
	PU2	Overall, using the BP Assistant is advantageous to my hypertension management [27].		4.380 (0.587)
User satisfaction (US)
	US1	I am content with my use of BP Assistant [27,41,42].		4.504 (0.599)
	US2	I am satisfied with my use of BP Assistant [27,29,41,42].		4.488 (0.544)
Perceived health status (PHS)
	PHS1	Currently, my BP is back to normal [8,43].		4.101 (0.796)
	PHS2	Currently, my BP is under control [8,43,44].		4.031 (0.787)
	PHS3	Currently, I don’t worry about my health [13].		4.225 (0.707)
Continuous use intention (CUI)
	CUI1	I intend to continue using the BP Assistant rather than discontinue its use [27,42].		4.519 (0.558)
	CUI2	If I could, I would like to discontinue my use of the BP Assistant (reverse coded) [27].		4.116 (0.850)

^aScored on a 5-point Likert scale. Each question was anchored between 1 (strongly disagree) and 5 (strongly agree).

^bBP: blood pressure.