Table 2.

Operationalization of health literacy concepts in selected studies (N=68).

Type of measure	Thematic category, n (%)
	General and skill-based (n=23)	Multidimensional (n=6)	Domain-specific (n=39)
Reading comprehension and numeracy	11 (16.2)	0 (0)	1 (1.5)
Self-efficacy	6 (8.8)	2 (2.9)	34 (50.0)
Knowledge	2 (2.9)	0 (0)	3 (4.4)
Performance tasks	1 (1.5)	0 (0)	0 (0)
Qualitative assessment	1 (1.5)	0 (0)	0 (0)
Several	2 (2.9)	4 (5.9)	1 (1.5)