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Concordance between two instruments for health literacy assessment
Luana Resende Cangussú1, Eduardo Antonio Sartori Alho1, Felipe Esdras Lucas Cardoso1
1Universidade Federal do Vale do São Francisco, Paulo Afonso, BA, Brasil.
Summary
The Short Assessment of Health Literacy for Portuguese-speaking Adults (SAHLPA-18) and Short Test of Functional Health Literacy in Adults (S-TOFHLA) show poor agreement, indicating different constructs. Researchers should use distinct instruments for health literacy measurement.
Area of Science:
- Health literacy research
- Cross-cultural adaptation of health instruments
- Psychometrics
Background:
- Health literacy is crucial for effective healthcare.
- Validated instruments are needed to assess health literacy accurately.
- Comparing existing tools like SAHLPA-18 and S-TOFHLA is essential for understanding their utility.
Purpose of the Study:
- To determine the agreement between SAHLPA-18 and S-TOFHLA for assessing health literacy.
- To evaluate the concurrent validity of these two measurement instruments.
- To assess health literacy levels in Brazilian National Health System users.
Main Methods:
- Cross-sectional study design.
- Involved 372 users of the Brazilian National Health System.
- Employed a weighted Kappa test for concurrent validity assessment.
Main Results:
- 66% (SAHLPA-18) and 62% (S-TOFHLA) of participants had inadequate health literacy.
- A strong correlation (r=0.60) was observed between the instruments.
- However, the agreement was weak (Kappa=0.35), indicating poor concordance.
Conclusions:
- SAHLPA-18 and S-TOFHLA possess different constructs and exhibit poor agreement.
- Using distinct instruments is recommended for health literacy research.
- Developing condition-specific instruments is advised for more contextually relevant results.
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