Validation of the short assessment of health literacy (SAHL-D) and short-form development: Rasch analysis

Anke Woudstra, Corine Meppelink, H.L.W. Pander Maat, Janke Oosterhaven, Mirjam Franssen, Alexandra Dima

Research output: Contribution to journalArticleAcademicpeer-review


Accurate measurement of health literacy is essential to improve accessibility and effectiveness of health care and prevention. One measure frequently applied in international research is the Short Assessment of Health Literacy (SAHL). While the Dutch SAHL (SAHL-D) has proven to be valid and reliable, its administration is time consuming and burdensome for participants. Our aim was to further validate, strengthen and shorten the SAHL-D using Rasch analysis.

Available cross-sectional SAHL-D data was used from adult samples (N = 1231) to assess unidimensionality, local independence, item fit, person fit, item hierarchy, scale targeting, precision (person reliability and person separation), and presence of differential item functioning (DIF) depending on age, gender, education and study sample.

Thirteen items for a short form were selected based on item fit and DIF, and scale properties were compared between the two forms. The long form had several items with DIF for age, gender, educational level and study sample. Both forms showed lower measurement precision at higher health literacy levels.

The findings support the validity and reliability of the SAHL-D for the long form and the short form, which can be used for a rapid assessment of health literacy in research and clinical practice.
Original languageEnglish
Article number122
Number of pages10
JournalBMC Medical Research Methodology [E]
Issue number122
Publication statusPublished - 2019


  • Health literacy
  • Measurement
  • Public health
  • Rasch
  • SAHL-D
  • Short-form


Dive into the research topics of 'Validation of the short assessment of health literacy (SAHL-D) and short-form development: Rasch analysis'. Together they form a unique fingerprint.

Cite this