JOURNAL ARTICLE
RANDOMIZED CONTROLLED TRIAL

The influence of health literacy level on an educational intervention to improve glaucoma medication adherence

Kelly W Muir, Alice Ventura, Sandra S Stinnett, Abraham Enfiedjian, R Rand Allingham, Paul P Lee
Patient Education and Counseling 2012, 87 (2): 160-4
22000272

OBJECTIVE: To test an educational intervention targeted to health literacy level with the goal of improving glaucoma medication adherence.

METHODS: One hundred and twenty-seven veterans with glaucoma were randomized to glaucoma education or standard care. The intervention included a video scripted at a 4th, 7th, or 10th grade level, depending on the subject's literacy level. After six months, the number of days without glaucoma medicine (DWM) according to pharmacy records for the intervention and control groups was compared.

RESULTS: The number of DWM in the six months following enrollment was similar for control and intervention groups (intervention, n=67, DWM=63 ± 198; standard care, n=60, DWM=65 ± 198; p=0.708). For each subgroup of literacy (adequate, marginal, inadequate), subjects in the intervention group experienced less mean DWM than subjects in the control group and the effect size (ES) increased as literacy decreased: adequate literacy, ES 0.069; marginal, ES 0.183, inadequate, ES 0.363. Decreasing health literacy skills were associated with decreasing self-reported satisfaction with care (slope=0.017, SE=0.005, p=0.002).

CONCLUSIONS: Patients with decreased health literacy skills may benefit from educational efforts tailored to address their health literacy level and learning style.

PRACTICE IMPLICATIONS: Providers should consider health literacy skills when engaging in glaucoma education.

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