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Table 1 Characteristics of included patients admitted to the emergency department in primary cohort (2010) and validation cohort (2013)

From: Routine blood tests are associated with short term mortality and can improve emergency department triage: a cohort study of >12,000 patients

  Primary cohort (n = 5371) Validation cohort (n = 5738) p-value
Age (median, IQR) 63.8 [46.92–76.52] 63.0 [46.0–76.0] 0.21
Male gender (n, %) 2578 (48.0) 2835 (49.4) 0.14
30-day mortality (n, %) 284 (5.3) 234 (4.1) <0.01
48-h mortality (n, %) 61 (1.1) 50 (0.9) 0.19
C-reactive protein, nmol/L (median, IQR) 5.8 [1.7–29.17] 4.9 [2.9–22.2] <0.001
Potassium, mmol/L (median, IQR) 4.1 [3.8–4.4] 4.0 [3.9–4.3] <0.001
Sodium, mmol/L (median, IQR) 137.5 [135.0–139.4] 139 [136.9–140.7] <0.001
Haemoglobin, mmol/L (median, IQR) 8.4 [7.6–9.1] 8.4 [7.6–9.1] 0.52
Creatinine, μmol/L (median, IQR) 71.2 [59.0–87.0] 71.0 [60.0–87.0] 0.77
Leukocyte count, 109/L (median, IQR) 8.7 [6.8–11.5] 8.2 [6.5–10.6] <0.001
Albumin, g/L (median, IQR) 42.0 [38.6–44.7] 37.2 [33.6–39.8] <0.001
Lactate dehydrogenase, U/L (median, IQR) 178.1 [153.3–213.6] 182.2 [157.0–216.9] 0.50
Arterial oxygen saturation, % (median, IQR) 98 [96–99] 98 [96–99] 0.31
Respiratory rate, min−1 (median, IQR) 16 [16–20] 16 [15–19] <0.001
Heart rate, min−1 (median, IQR) 82 [71–95] 80 [70–92] <0.001
Systolic blood pressure, mmHg (median, IQR) 140 [125–157] 134 [119–150] <0.001