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Table 1 Characteristics of patients surviving or not surviving until hospital discharge (developmental set)

From: Identification of high-risk subgroups in very elderly intensive care unit patients

Variable Survivors (n = 3,145) Non-survivors (n = 1,433) p valuea
Age in yearsb 83.2 ± 3.3 83.6 ± 3.4 < 0.05
Male 45.7% 47.8% 0.554
Maximum temperature in degrees Celsiusb 37.5 ± 0.82 37.4 ± 1.37 0.397
Heart rate in beats per minuteb 69.6 ± 16.7 67.4 ± 29.1 0.0107
Sodium in millimoles per literb 137 ± 4.5 137 ± 5.87 0.00329
Potassium in millimoles per literb 3.7 ± 0.544 3.78 ± 0.739 < 0.001
Creatinine in micromoles per literb 104 ± 71.8 143 ± 105 < 0.001
Bicarbonate in millimoles per literb 21.4 ± 4.02 18.7 ± 5.53 < 0.001
Albumin in grams per literb 22.3 ± 6.8 20 ± 7.71 < 0.001
pHb 7.38 ± 0.0837 7.32 ± 0.124 < 0.001
Urine output in liters per 24 hoursb 2.65 ± 2.02 1.75 ± 1.78 < 0.001
Glasgow Coma Scale    
   Score = 15 2,950 1,029 < 0.05
   Score less than 15 195 (6.2%) 404 (28.2%)  
APACHE II scoreb 16.7 ± 5.46 22.5 ± 8.16 < 0.001
APACHE II predicted mortalityb 0.197 ± 0.178 0.432 ± 0.262 < 0.001
SAPS II scoreb 36.2 ± 12.1 54.2 ± 20.4 < 0.001
SAPS II predicted mortalityb 0.219 ± 0.193 0.513 ± 0.305 < 0.001
Cardiopulmonary resuscitation before admission 2.7% 15.2% < 0.001
Length of stay at intensive care unit in daysc 1.0 (0.8–2.9) 1.9 (0.7–5.7) < 0.001
Length of stay at hospital in daysc 14 (9–25) 10 (3.2–24) 0.04
  1. ap value less than 0.05 is significant; bmean ± standard deviation; cmedian (interquartile range). APACHE II, Acute Physiology and Chronic Health Evaluation II; SAPS II, Simplified Acute Physiology Score II.
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