Table 3 Unadjusted and adjusted odds ratios (OR) from logistic regression analysis of all correct sodium knowledge questions

Age, years

0.99 [0.97,1.02]; p 0.55

0.99 [0.96,1.01]; p 0.35

Sex

  Male

Reference

Reference

  Female

0.61 [0.32,1.18]; p 0.14

0.36 [0.16,0.81]; p 0.01

Race

  White

Reference

Reference

  Non-white

0.32 [0.15,0.69]; p <0.01

0.33 [0.14,0.76]; p 0.01

Formal educational attainment

  < H.S. Graduate

Reference

Reference

  ≥ H.S. Graduate

1.44 [0.42, 4.95]; p 0.56

0.67 [0.15,2.98]; p 0.59

Health literacy

  <9th grade

Reference

Reference

  ≥9th grade

2.00 [0.92, 4.33]; p 0.08

2.27 [0.86,5.98]; p 0.10

Self-reported hypertension

  No hypertension

Reference

Reference

  Hypertension

1.79 [0.67,4.82]; p 0.25

3.16 [0.94,10.59]; p 0.06

CKD stage

  Stages 1-2

Reference

Reference

  Stage 3

0.81 [0.34, 1.93]; p 0.64

0.95 [0.32.2.86]; p 0.93

  Stages 4-5

0.90 [0.36, 2.29]; p 0.83

1.05 [0.33,3.37]; p 0.93

Kidney disease education class

  Did not attend

Reference

Reference

  Did attend

1.49 [0.58,3.84]; p 0.41

1.67 [0.57,4.92]; p 0.35