Table 1.

Exclusion and inclusion criteria.

Exclusion Criteria: Title and Abstract Screening (Screening Stage)
EC 1	Participants were not at least 18 years old.
EC 2	Studies did not report original research.
EC 3	Studies did not assess health literacy.
EC 4	Studies did not use a quantitative approach for the estimation of HL.
EC 5	Patients were not involved in the assessment of HL.
EC 6	HCPs were not involved in the assessment of HL.
Inclusion Criteria: Full-Text Screening (Eligibility Stage)
Article Requirements
IC 1	Studies were published in a peer reviewed journal.
IC 2	Studies reported original research.
IC 3	The methodology was reproducibly documented.
Assessment Requirements
IC 4	Studies addressed the analysis of agreement between patients’ HL assessment by patients and HCPs (i.e., providers that are in direct contact with patients).
IC 5	Patients (self- assessment) and HCPs (proxy assessment) assessed the same patient sample.
IC 6	HCP-rated patients’ HL measurement: HCPs assessed patients´ HL needs.
IC 7	Self-reported patients’ HL measurement: Studies used a standardized measurement of patients’ HL.