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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

VariablesControl (n = 100)ARDS (n = 121)P value
Age, years51.0 (39.75–65.75)61.0 (43.5–69.0)n.s.
Male/Female66/34 (66.0/34.0)84/37 (69.4/30.6)n.s.
Ethnicity  n.s.
 Hans100 (100)121 (100) 
Serum-S1P, nmol/L930.5 (733.2–1153.4)303.0 (221.3–418.5)< 0.001
RBC count, × 1012/L4.5 (3.89–5.063)2.8 (2.475–3.1)< 0.001
Platelet count, × 109/L199.5 (150.3–253.8)174 (92.5–259)0.025
Serum albumin, g/L40 (36–44.28)29.4 (27.3–31.95)< 0.001
HDL, mmol/L1.40 (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