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Table 2 Characteristics of study groups

From: Serum sphingosine-1-phosphate levels and Sphingosine-1-Phosphate gene polymorphisms in acute respiratory distress syndrome: a multicenter prospective study

Variables Control (n = 100) ARDS (n = 121) P value
Age, years 51.0 (39.75–65.75) 61.0 (43.5–69.0) n.s.
Male/Female 66/34 (66.0/34.0) 84/37 (69.4/30.6) n.s.
Ethnicity    n.s.
 Hans 100 (100) 121 (100)  
Serum-S1P, nmol/L 930.5 (733.2–1153.4) 303.0 (221.3–418.5) < 0.001
RBC count, × 1012/L 4.5 (3.89–5.063) 2.8 (2.475–3.1) < 0.001
Platelet count, × 109/L 199.5 (150.3–253.8) 174 (92.5–259) 0.025
Serum albumin, g/L 40 (36–44.28) 29.4 (27.3–31.95) < 0.001
HDL, mmol/L 1.40 (1.04–2.13) 0.57 (0.36–0.89) < 0.001
  1. Continuous variables are presented as median (interquartile range); categorical variables are presented as No. (%)
  2. ARDS Acute respiratory distress syndrome, n.s. non-significant, S1P sphingosine-1-phosphate, RBC red blood cell, HDL high-density lipoprotein