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Table 1 Comparisons of pre- and intraoperative findings between the two groups

From: Preemptive intravenous iron therapy versus autologous whole blood therapy for early postoperative hemoglobin level in patients undergoing bimaxillary orthognathic surgery: a prospective randomized noninferiority trial

Group Intravenous iron Autologous whole blood p
n 32 32
Preoperative findings
 Sex (male) 16 (50%) 17 (53%) 0.802
 Age (years) 21 (20–25) 21 (20–24) 0.47
 Height (cm) 170.0 (160.7–176.8) 169.5 (164.0–177.0) 0.527
 Weight (kg) 60.5 (54.0–71.8) 63.0 (50.0–77.0) 0.591
 Body mass index (kg/m2) 22.0 ± 3.9 22.6 ± 5.3 0.579
 ASA physical status I 32 (100%) 32 (100%)
Vital signs
 Systolic blood pressure (mmHg) 116 ± 9 118 ± 13 0.325
 Diastolic blood pressure (mmHg) 72 ± 10 71 ± 9 0.664
Heart rate (beats/min) 81 ± 12 81 ± 12 0.96
Intraoperative findings
 Total operation duration (min) 213 ± 39 230 ± 35 0.07
Average during surgery
 Systolic blood pressure (mmHg) 94 (90–97) 93 (88–99) 0.851
 Diastolic blood pressure (mmHg) 52 (46–55) 53 (48–59) 0.371
 Heart rate (beats/min) 79 (72–90) 78 (77–91) 0.51
Total amount of fluid input (mL)
 Crystalloid (mL) 1250 (1000–1975) 1500 (645–2250) 0.968
 Colloid (mL) 650 (500–750)
 Autologous whole blood (mL) 640 (640–640)
Hemorrhage (mL) 900 (500–1138) 1000 (700–1425) 0.424
Urine output (mL) 150 (120–250) 215 (50–400) 0.491
  1. Values are expressed as mean ± SD, median (interquartile) and number (proportion)
  2. ASA American Society of Anesthesiologist