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Psychometric properties of the brief health literacy screen in clinical practice.
Wallston KA, Cawthon C, McNaughton CD, Rothman RL, Osborn CY, Kripalani S
(2014) J Gen Intern Med 29: 119-26
MeSH Terms: Academic Medical Centers, Adult, Aged, Ambulatory Care Facilities, Educational Measurement, Female, Health Literacy, Humans, Male, Mass Screening, Middle Aged, Nursing Service, Hospital, Patient Admission, Primary Care Nursing, Psychometrics, ROC Curve, Reproducibility of Results, Tennessee
Show Abstract · Added December 10, 2013
BACKGROUND - The three-item Brief Health Literacy Screen (BHLS) has been validated in research settings, but not in routine practice, administered by clinical personnel.
OBJECTIVE - As part of the Health Literacy Screening (HEALS) study, we evaluated psychometric properties of the BHLS to validate its administration by clinical nurses in both clinic and hospital settings.
PARTICIPANTS - Beginning in October 2010, nurses in clinics and the hospital at an academic medical center have administered the BHLS during patient intake and recorded responses in the electronic health record.
MEASURES - Trained research assistants (RAs) administered the short Test of Functional Health Literacy in Adults (S-TOFHLA) and re-administered the BHLS to convenience samples of hospital and clinic patients. Analyses included tests of internal consistency reliability, inter-administrator reliability, and concurrent validity by comparing the nurse-administered versus RA-administered BHLS scores (BHLS-RN and BHLS-RA, respectively) to the S-TOFHLA.
KEY RESULTS - Cronbach's alpha for the BHLS-RN was 0.80 among hospital patients (N = 498) and 0.76 among clinic patients (N = 295), indicating high internal consistency reliability. Intraclass correlation between the BHLS-RN and BHLS-RA among clinic patients was 0.77 (95 % CI 0.71-0.82) and 0.49 (95 % CI 0.40-0.58) among hospital patients. BHLS-RN scores correlated significantly with BHLS-RA scores (r = 0.33 among hospital patients; r = 0.62 among clinic patients), and with S-TOFHLA scores (r = 0.35 among both hospital and clinic patients), providing evidence of inter-administrator reliability and concurrent validity. In regression models, BHLS-RN scores were significant predictors of S-TOFHLA scores after adjustment for age, education, gender, and race. Area under the receiver operating characteristic curve for BHLS-RN to predict adequate health literacy on the S-TOFHLA was 0.71 in the hospital and 0.76 in the clinic.
CONCLUSIONS - The BHLS, administered by nurses during routine clinical care, demonstrates adequate reliability and validity to be used as a health literacy measure.
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