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Table 1 Demographic and clinical data by group

From: Monitoring of brain oxygen saturation (INVOS) in a protocol to direct blood transfusions during cardiac surgery: a prospective randomized clinical trial

  Group A Group B P
  (INVOS, n = 75) (Control, n = 75)  
Age (yrs) 67.3 ± 8.5 65.9 ± 9.5 0.329
Female n (%) 12 (16.0%) 15 (20.0%) 0.523
Weight (kg) 79.1 ± 14.4 75.9 ± 13.0 0.140
Height (cm) 166.9 ± 8.3 166.7 ± 8.9 0.893
BMI 28.4 ± 4.6 27.2 ± 3.5 0.084
BSA (m2) 1.86 ± 0.19 1.83 ± 0.20 0.281
LVEF (%) 47.4 ± 10.8 48.3 ± 8.0 0.536
Prior MI, n (%) 42 (56.0%) 40 (53.3%) 0.742
Diabetes, n (%) 17 (22.6%) 19 (25.3%) 0.702
Hypertension, n (%) 62 (82.6%) 59 (78.6%) 0.535
COPD, n (%) 16 (21.3%) 16 (21.3%) 1.000
Preoperative Hct (%) 39.5 ± 3.90 40.4 ± 4.53 0.246
Operation    
CABG (isolated), n (%) 63 (84.0%) 58 (77.3%) 0.348
Number of grafts 207 in 67 pts 192 in 66 pts  
MVR, n (%) 3 (4.0%) 3 (4.0%)  
MVR/CABG, n (%) 1 (1.3%) 0 (0.0%)  
AVR, n (%) 5 (6.6%) 4 (5.3%)  
AVR/CABG, n (%) 3 (4.0%) 8 (10.6%)  
ASD repair, n (%) 0 (0.0%) 2 (2.6%)  
CPB time (min) 88.8 ± 18.2 93.7 ± 29.8 0.216
Operation time (min) 249.9 ± 41.9 248.0 ± 59.2 0.812
Postoperative data    
hmv* 16.4 ± 24.7 14.6 ± 10.3 0.558
ICU LOS** 2.7 ± 3.8 2.7 ± 3.6 0.999
hospital LOS*** 10.9 ± 3.6 10.2 ± 10.7 0.181
LOS > 9, n (%) 51 (68.0%) 41 (54.7%) 0.132
Complications, n (%) 14 (18.6%) 12 (16.0%) 0.666
Death, n (%) 1 (1.3%) 1 (1.3%) 1.000
  1. * hmv hours of mechanical ventilation (ICU).
  2. ** ICU length of stay in nights.
  3. *** Hospital LOS in days (not including days in hospital before surgery).
  4. denotes the number of patients with hospital LOS greater than 9 days.