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Table 1 Patients' characteristics before surgery

From: Goal-directed fluid management based on pulse pressure variation monitoring during high-risk surgery: a pilot randomized controlled trial

Characteristic Group
  C (n = 16) I (n = 17)
Sex, M/F 12/4 11/6
Age (years) 62 ± 10 63 ± 16
Weight (kg) 68 ± 16 66 ± 16
Height (cm) 170 ± 8 164 ± 9
Body mass index (kg/m2) 23 ± 4 24 ± 5
ASA II score 3 3
ASA III score 9 8
ASA IV score 4 6
Chronic disease   
   Renal failure requiring dialysis 1 0
   Renal failure without dialysisa 5 6
   Cirrhosis 0 1
   Chronic obstructive pulmonary disease 6 8
   Hypertension 13 13
   Peripheral vascular disease 3 9b
   Coronary artery disease 1 3
   Other cardiopathy 5 8
   Diabetes mellitus 5 7
   Cerebrovascular disease 1 3
Preoperative biological tests   
   Serum creatinine (μmol/l) 124 ± 90 132 ± 55
   Prothrombin time (percentage) 87 ± 13 80 ± 19
   Hemoglobin (g/dl) 11.3 ± 2.0 11.9 ± 2.5
   Platelets (/μl) 305,000 ± 108,000 301,000 ± 110,000
  1. ASA, American Society of Anesthesiology physical status; C, control; I, intervention. aSerum creatinine more than 130 μmol/l; bP < 0.05, control group versus intervention group.