Table 1 Inclusion and exclusion criteria

Inclusion criteria

 − The study was conducted on people with hearing impairment;

 − Studies reporting levels of health literacy, influencing factors, measurement methods or health care outcomes;

 − Studies in which the control group was non-disabled, or studies conducted on people with hearing disabilities alone;

 − Studies conducted after 2000

Exclusion criteria

 − Research not related to the topic;

 − Studies not simultaneously related to people with hearing impairment and health literacy;

 − Studies not conducted after 2000;

 − Non-original research;

 − Articles not written in Korean or English