Table 1.

eHeals-Carer (eHealth Literacy Scale for Carers of People With Chronic Diseases) items: item difficulty, corrected item-total correlation, and factor loading.

Questions per factor		Mean (SD)	Median	Corrected item-total correlation	Factor loadings
Factor 1
	Item 1: “I know what resources/information are available on the Internet concerning the health and caregiving issues of my friend/relative (practical, financial, legal issues, information about the disease and available services).”	3.51 (0.93)	4	0.48	0.485
	Item 2: “I know where to find helpful information on the Internet concerning the health and caregiving of my friend/relative (e.g. which websites I will search).”	3.35 (1.06)	4	0.59	0.540
	Item 3: “I know how to find helpful information on the Internet concerning the health and caregiving of my friend/relative (e.g concerning the process: google search).”	4.08 (0.82)	4	0.55	0.735
	Item 4: “I know how to use the Internet to answer my questions about the health and caregiving of my friend/relative (e.g how to ask in order to receive a proper reply to my question).”	3.83 (1)	4	0.53	0.656
	Item 5: “I know how to use the information about the health and caregiving of my friend/relative I find on the Internet to help me (practical, financial, legal issues, information about the disease and available services).”	3.75 (0.85)	4	0.55	0.500
	Total	18.49 (19)	19	—a	—
Factor 2
	Item 6: “I have the skills I need to evaluate the resources/information I find on the Internet concerning the health and caregiving of my friend/relative.”	3.70 (1.05)	4	0.59	0.756
	Item 7: “I can tell high quality resources/information from low quality resources/information on the Internet concerning the health and caregiving of my friend/relative.”	3.75 (1)	4	0.59	0.731
	Item 8: “I feel confident in using information from the Internet to make decisions concerning the health and caregiving of my friend/relative.”	3.30 (1.08)	3	0.57	0.595
	Total	10.77 (2.62)	11	—	—
Total scores from both factors		29.27 (5.30)	29	—	—

^aNot applicable.