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Table 2 Short Form-36 data of the study patients shown as mean, Standard Deviation (SD), median and quartiles [Q1-Q3]. For each SF-36 dimension, the values for the study patients and the normative values are reported, with delta value (mean of study patients –normative mean). Negative delta values represent a quality of life of the study patients worse than that of the normal population

From: Fatigue in intensive care survivors one year after discharge

  Study patients Normative valuesa Delta p value *
SF-36b
PF mean 65.89 68.95 -3.1 0.510
SD 29.45 18.21   
Median 75    
Q1-Q3 44-90    
RP mean 48.66 64.61 -15.9** 0.006
SD 39.14 15.47   
Median 50    
Q1-Q3 0-100    
BP mean 73.98 63.95 +10 0.021
SD 29.81 11.37   
Median 84    
Q1-Q3 52-100    
GH mean 60.05 53.81 +6.2 0.074
SD 23.19 11.38   
Median 67    
Q1-Q3 39-77    
VT mean 65.63 55.34 +10.3 0.001
SD 20.45 8.14   
Median 68    
Q1-Q3 50-80    
SF mean 76.79 79.70 -2.9 0.435
SD 26.91 6.61   
Median 88    
Q1-Q3 59-100    
RE mean 72.02 68.06 -4.0 0.496
SD 42.06 10.16   
Median 100    
Q1-Q3 58-100    
MH mean 72.21 62.06 +10.1 0.001
SD 20.14 5.92   
Median 76    
Q1-Q3 60-88    
  1. a Data of the Italian normative sample collected by Apolone et al. [24] adjusted for gender and age
  2. b PF physical functioning, RP role limitation due to physical problems, BP bodily pain, GH general health, VT vitality, SF social functioning, RE role limitation due to emotional problems, MH mental health (range 0-100 with higher scores represent better functioning)
  3. * p value: statistical significance according to unpaired t test
  4. ** Delta value showing a minimum clinically significant difference of more than 5 points, consistent with quality of life worse than the adjusted normal population