Measurement of health literacy in patients with cardiovascular diseases: A systematic review

While many instruments have been developed, validated, and used to assess health literacy skills, their use and appropriateness among patients with cardiovascular diseases (CVDs) are not widely studied. To identify, appraise, and synthesize available health literacy assessment instruments used in patients with CVDs. Electronic databases were searched for studies that used validated measures to assess health literacy in patients with CVDs. Included studies were assessed for risk of bias and the identified instruments were evaluated based on their psychometric properties. Data were synthesized using a narrative approach. Forty-three studies were included in the review, of which 20 were cross-sectional studies and 12 were randomized controlled trials. Eleven health literacy assessment instruments were identified, of which only one was disease-specific. The Abbreviated version of the Test of Functional Health Literacy in Adults (S-TOFHLA) (n = 19) and the Rapid Estimate of Adult Literacy in Medicine (REALM) (n = 13) were found to be the most commonly used instruments to assess health literacy in CVDs. The S-TOFHLA and the REALM are the most widely used instruments to evaluate health literacy in CVD population. More CVD-specific health literacy screening instruments are warranted. Assessment of health literacy should be a standard of care in patients with CVDs and effective interventions should be developed to improve the impact of limited health literacy on health outcomes in this population.