Table 3 Predictors of higher knowledge scores in patients and surrogates
Characteristic | Total knowledge score, median (IQR) | p value |
|---|---|---|
Age, years | Â | .03 |
  ≥ 60 | 7(5–9) |  |
  < 60 | 9(7–12) |  |
Sex | Â | .05 |
  Female | 9(7–12) |  |
  Male | 7(5–10) |  |
Race | Â | .23 |
  Non-Caucasian race | 8(5–10) |  |
  Caucasian | 10(8–12) |  |
Marital status | Â | .02 |
  Single | 10(8–13) |  |
  Married | 8(5–10) |  |
  Widowed | 5.5(2–6) |  |
  Divorced | 7(5–8) |  |
Education | Â | .03 |
  ≥ college graduate | 7(5–10) |  |
  < college graduate | 10(7–12) |  |
Self-reported health status | Â | .07 |
  Fair or poor | 7(5–10) |  |
  Good or better | 9(7–12) |  |
How confident are you in filling out medical forms by yourself? (health literacy) | Â | .01 |
  Somewhat confident or less | 7(3–9) |  |
  Extremely or quite a bit confident | 9(7–11) |  |
Prior health care experience | Â | .002 |
  Yes | 10(7–13) |  |
  No | 7(5–10) |  |
Have you performed CPR on somebody else? | Â | .17 |
  Yes | 11(7–13) |  |
  No | 8(5–10) |  |
Has CPR been performed on you? | Â | .03 |
  Yes | 5(2–7) |  |
  No | 8(6–11) |  |
Primary ICU service | Â | .84 |
  Medical patient | 7(5–12) |  |
  Surgical patient | 8(6–10) |  |
ICU admission APACHE III score | Â | .19 |
  ≥ 70 | 7(4-10 |  |
  < 70 | 8(7–11) |  |
Code status on ICU admission | Â | .27 |
  Full code | 8(6-10 |  |
  DNR | 6(2–10) |  |