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Table 3 Predictors of higher knowledge scores in patients and surrogates

From: Development, validation, and results of a survey to measure understanding of cardiopulmonary resuscitation choices among ICU patients and their surrogate decision makers

Characteristic Total knowledge score, median (IQR) p value
Age, years   .03
  ≥ 60 7(5–9)  
  < 60 9(7–12)  
Sex   .05
  Female 9(7–12)  
  Male 7(5–10)  
Race   .23
  Non-Caucasian race 8(5–10)  
  Caucasian 10(8–12)  
Marital status   .02
  Single 10(8–13)  
  Married 8(5–10)  
  Widowed 5.5(2–6)  
  Divorced 7(5–8)  
Education   .03
  ≥ college graduate 7(5–10)  
  < college graduate 10(7–12)  
Self-reported health status   .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)   .01
  Somewhat confident or less 7(3–9)  
  Extremely or quite a bit confident 9(7–11)  
Prior health care experience   .002
  Yes 10(7–13)  
  No 7(5–10)  
Have you performed CPR on somebody else?   .17
  Yes 11(7–13)  
  No 8(5–10)  
Has CPR been performed on you?   .03
  Yes 5(2–7)  
  No 8(6–11)  
Primary ICU service   .84
  Medical patient 7(5–12)  
  Surgical patient 8(6–10)  
ICU admission APACHE III score   .19
  ≥ 70 7(4-10  
  < 70 8(7–11)  
Code status on ICU admission   .27
  Full code 8(6-10  
  DNR 6(2–10)  
  1. IQR, interquartile range; CPR, cardiopulmonary resuscitation; ICU, intensive care unit; DNR, do not resuscitate.
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