Table 2.

eHealth Literacy Scale (eHEALS) mean items scores, scale reliability, and principal component analysis

Item	Study 1		Study 2		Factor loading		item-total correlationa
	Mean	SD	Mean	SD	Study 1	Study 2	Study 1	Study 2
1: I know what health resources are available on the Internet	3.6	0.83	3.4	0.86	.82	.77	.80	.70
2: I know where to find helpful health resources on the Internet	3.6	0.87	3.3	0.88	.85	.79	.84	.73
3: I know how to find helpful health resources on the Internet	3.7	0.81	3.5	0.94	.85	.86	.85	.72
4: I know how to use the Internet to answer my health questions	3.6	0.85	3.6	0.88	.83	.86	.83	.70
5: I know how to use the health information I find on the Internet to help me	3.5	0.88	3.4	.087	.84	.77	.85	.67
6: I have the skills I need to evaluate the health resources I find on the Internet	3.6	0.89	3.6	0.90	.82	.77	.84	.67
7: I can tell high-quality from low-quality health resources on the Internet	3.4	0.95	3.4	1.00	.80	.75	.82	.76
8: I feel confident in using information from the Internet to make health decisions	3.3	0.99	3.1	1.12	.74	.80	.78	.82
Mean (SD) sum score	28.2	5.9	27.6	5.9
Eigenvalue first component	5.36		5.06
Variance accounted for	67%		63%
Cronbach alpha	.93		.92

^a All item-total correlations were significant at P < .001.