Table 9.

Evaluation methods used by included studies (N=18).^a

Method		Count, n (%)	References
Asking the users
	Questionnaires or surveys	9 (50)	[23,24,26,28,31,33,35,36,38]
	Interviews	2 (11)	[33,38]
Evaluating user behavior
	eHealth data analysis	10 (56)	[21,22,27-31,34,36,37]
	System usage log analysis	4 (22)	[21,27,29,35]
Evaluating usefulness of the interface
	Expert method	1 (6)	[26]
	Usability user study	3 (17)	[24,33,38]

^aIncluded studies may have more than 1 evaluation method.