Table 4. Correlation coefficients of sub-scales of health literacy.

Sub-scalea	Overall	Print-prose	Print-document	Print-quantitative	Oral	Internet
Overall	1.000
Print-prose	0.721**	1.000
Print-document	0.791**	0.531**	1.000
Print-quantitative	0.691**	0.468**	0.497**	1.000
Oral	0.686**	0.413**	0.422**	0.339**	1.000
Internet	0.690**	0.327**	0.358**	0.256**	0.350**	1.000

Note: **P<0.01.

^aThe print-prose literacy scale measured the knowledge and skills needed to search, comprehend, and use information from texts that were organized in sentences or paragraphs.

The print-document literacy scale measured the knowledge and skills needed to search, comprehend, and use information from non-continuous texts in various formats.

The print-quantitative scale measured the knowledge and skills needed to identify and perform computations using numbers embedded in printed materials. [5].

The oral literacy scale measured the skills to comprehend and interpret information in the form of videos and recordings.

The internet literacy scale measured the skills to utilize the internet to obtain health information.