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. Author manuscript; available in PMC: 2014 Jan 1.
Published in final edited form as: Crit Care Med. 2013 Jan;41(1):9–14. doi: 10.1097/CCM.0b013e318265f340

Table 2.

Patient versus population norms for baseline quality of life using EQ-5D

EQ-5D section Na Mean
Patient
Score		 Mean Age- and
Sex-Matched
Population norm		 Mean paired difference
[95% CI]
(population - patient)		 P value for
difference > 0b 		P value for
difference ≥
MIDc
Visual Analogue Score 136 69.2 79.8 10.6 [14.9, 6.3] <0.001 N/A
Utility Score 134 0.752 0.860 0.108 [0.151, 0.065] <0.001 0.121

Abbreviations: CI – confidence intervals. MID - minimal important difference

a

Four patients were missing VAS scores and 6 had missing data for at least one domain, which prevents calculation of the utility score

b

P-value for testing if the mean paired difference is greater than zero

c

P-value for testing if the mean paired difference is greater than the minimum important difference 0.074 (27)