Table 3.

Concepts 7 to 12 identified in reviewed instruments (N=23).

Article	Concepts and model authors						Concepts not included in models
	Perceived ease of use [19,21-23]	Policies & procedures [20]	Risk & benefits [23]	Satisfaction/ acceptability/ preferences [23]	Social influence [21]	Usability [23]
Atkison, 2007 [29]	X					X
Bakken, 2006 [30]	X			X		X
Brockmeyer, 2013 [31]	X		X	X
Brooke, 1996 [32]				X		X
Bunz, 2004 [33]	X			X		X
Demiris, 2000 [34]	X		X	X		X
Finkelstein, 2012 [35]	X			X
Henkemans, 2013 [36]	X		X	X		X
Hudiberg, 1991-1996 [37-40]	X		X	X	X		Stress
Jay & Willis, 1992 [41]	X				X	X
Lewis, 1993 [42]	X		X	X		X
Lin, 2011 [43]	X			X		X
Martinez-Caro, 2013 [44]	X		X	X
Montague, 2012 [45]	X		X	X		X
Norman, 2006 [46]	X			X			eHealth literacy
Pluye, 2014 [47]	X			X
Schnall, 2011 [48]	X		X
Tariman, 2011 [49]	X			X
Wang, 2008 [50]	X			X		X
Wehmeyer, 2008 [27]	X			X			Symbolism; esthetics; perceived necessity
Wolfradt, 2001 [51]				X
Xie, 2013 [28]	X			X		X	Decision-making autonomy
Yip, 2003 [52]				X