Multivariate Regression Analysis for Any Difficulty Understanding OTC Medication Labels, With and Without Health Literacy Level

Model 1 (Without Health Literacy)aModel 2 (Inclusion of Health Literacy)b
aORc95% CIdPaORc95% CIdP
    16–18 y1.
    19–24 y1.40.2––12.3
    25–39 y0.70.1––4.7
    40–49 y0.90.1––6.4
    50–64 y0.70.1––4.10
    ≥65 ye
    In school3.1f1.0–9.6<.0012.00.7–5.5.2
    <High school2.9f1.9–4.41.8f1.02–3.00
    High school/equivalent1.7f1.0––2.7
    >High school1.01.0
    White, non-Hispanic1.
    Black, non-Hispanic0.50.2––1.5
Country of birth
    Outside of US8.4f3.5–20.46.8f2.6–18.1
    Below poverty threshold2.0f1.3––2.7.08
    100%–175% of poverty threshold1.50.9––2.3
    >175% of poverty threshold1.01.0
Health literacy
    Below basic3.4f1.6–7.4<.001
  • English proficiency was left out of the model because this question only assessed for those who learned at least 1 language other than English before starting school and stated that they do not read English “very well.” MSA indicates metropolitan statistical area.

  • a Overall test of fit for model 1 (Wald's χ2 = 132.8; df = 19; P < .001).

  • b Overall test of fit for model 2 (Wald's χ2 = 144.2; df = 21; P < .001).

  • c aOR for each category within each factor compared to the reference group.

  • d 95% CI for each aOR.

  • e No parents in the ≥65 age group who answered this question.

  • f Wald's test with aOR significantly different from reference group at a P < .05 significance level.

  • g Intermediate/proficient categorized together, because only 1.4% of those eligible to answer this question were in the proficient category.