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

Table 2 CPR knowledge scores and discriminative validity

Question (%)	Patients (n = 32)	Surrogates (n = 37)	Physicians (n = 20)	P value
What do the letters CPR stand for?	41%	57%	90%	.002
What is the purpose of CPR?	56	76	100	.002
When would members of the medical team start performing CPR?	75	84	95	.17
What treatments are used in CPR?
Chest compressions	81	92	90	.38
Breathing assistance	56	76	95	.008
Defibrillation	23	35	75	<.001
Medications or fluids	9	24	90	<.001
Could correctly identify chest compressions and breathing assistance as components of CPR	12	27	85	<.001
What does intubation mean?	37	57	100	<.001
What does mechanical ventilation mean?	34	68	100	<.001
What are some possible complications of CPR?	59	76	100	.004
What do the letters “DNR” stand for?	41	59	100	<.001
What do the letters “DNI” stand for?	34	49	100	<.001
Response to full code	63	51	100	<.001
Response to DNR	69	81	100	.02
What does code status mean?	22	8	95	<.001
Total knowledge score, 0–15 points (IQR)	7(5–10)	9(7–12)	14.5(14–15)	<.001

CPR, cardiopulmonary resuscitation; DNR, do not resuscitate; DNI, do not intubate; IQR interquartile range.

ISSN: 1471-2253