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Table 2 Vital signs and laboratory tests upon presentation

From: Serum lactate is an independent predictor of hospital mortality in critically ill patients in the emergency department: a retrospective study

  <2 mmol/L (N = 150) 2–4 mmol/L (N = 150) >4 mmol/L (N = 150) p-value
HR (bpm) (Mean ± SD) 95.22 ± 21.27 100.69 ± 24.14 103.59 ± 23.74 0.007
RR (Breaths/min) (Mean ± SD) 21.91 ± 5.54 22.09 ± 5.54 23.22 ± 6.11 0.110
SBP (mmHg) (Mean ± SD) 120.03 ± 28.23 124.56 ± 28.54 114.13 ± 29.92 0.009
DBP (mmHg) (Mean ± SD) 66.31 ± 17.88 67.31 ± 18.24 65.12 ± 22.06 0.626
O2 saturation (%) (Mean ± SD) 95.09 ± 7.83 95.03 ± 9.28 93.37 ± 8.30 0.147
Temperature (°C) (Mean ± SD) 37.23 ± 1.04 37.42 ± 1.04 37.05 ± 1.10 0.013
Lactate level (mmol/L) (Mean ± SD) 1.42 ± 0.38 2.72 ± 0.55 7.18 ± 3.42 <0.001
WBC (x109cells/L) (Mean ± SD) 11,071.33 ± 6908.81 12,728.00 ± 6860.88 15,583.33 ± 12,135.99 <0.001
Hemoglobin (mg/dl) (Mean ± SD) 11.54 ± 3.37 11.58 ± 2.19 11.30 ± 2.56 0.640
Hematocrit (mg/dl) (Mean ± SD) 33.46 ± 7.10 34.69 ± 6.55 34.30 ± 8.10 0.331
Arterial pH (Mean ± SD)a 7.35 ± 0.09 7.38 ± 0.09 7.31 ± 0.16 0.001
PaCO2 (mmHg) (Mean ± SD)a 41.63 ± 21.57 37.35 ± 13.22 34.98 ± 16.22 0.098
PaO2 (mmHg) (Mean ± SD)a 97.03 ± 47.74 97.45 ± 48.05 109.53 ± 70.75 0.350
Troponins (mg/dl) (Mean ± SD)b 0.10 ± 0.22 0.07 ± 0.12 0.11 ± 0.13 0.254
Creatinine (mg/dl) (Mean ± SD) 1.63 ± 1.94 1.44 ± 1.35 1.90 ± 1.65 0.053
  1. aObtained from 205 patients: 41 (<2 mmol/L), 64 (2–3.9 mmol/L) and 100 (>4 mmol/L)
  2. bObtained from 158 patients: 39 (<2 mmol/L), 56 (2-4 mmol/L) and 63 (>4 mmol/L)