Table 5 Descriptive statistics for all dichotomous (preoperative and intraoperative) predictors included in the model and for some essential postoperative variables in three groups of patients: group I, where the difference between the model estimate and the actual number of packs transfused was greater than two (303 patients); group II, where the absolute value of the difference between the number of packs transfused and the number estimated by model was not more than two packs (2574 patients); group III, where the difference between the actual number of packs transfused and the model estimate was greater than two packs (438 patients)
From: A simple clinical model for planning transfusion quantities in heart surgery
Variables | Frequency count and percentage in group I | Frequency count and percentage in group II | Frequency count and percentage in group III |
|---|---|---|---|
Preoperative and intraoperative predictors included in the model | |||
Hctadmission ≤ 40% | 257 (84.8%) | 1450 (56.3%) | 266 (60.7%) |
CBP time > 130 min | 222 (73.3%) | 929 (36.1%) | 200 (45.7%) |
Minimum HctCBP ≤ 20% | 108 (35.6%) | 333 (12.9%) | 92 (21.0%) |
Surgical procedure different from isolated CABG | 230 (75.9%) | 1098 (42.7%) | 231 (52.7%) |
Age > 70 years | 212 (70.0%) | 1146 (44.5%) | 241 (55.0%) |
Cardiogenic shock | 9 (29.0%) | 17 (54.8%) | 5 (16.1%) |
Preoperative dialysis | 7 (2.3%) | 8 (0.3%) | 6 (1.4%) |
Systemic arterial hypertension | 243 (80.2%) | 1701 (66.1%) | 28 (64.6%) |
Urgency | 22 (7.3%) | 220 (8.5%) | 4 (10.3%) |
Emergency | 19 (6.3%) | 37 (1.4%) | 10 (2.3%) |
Postoperative variables | |||
Morbidity | 150 (49.5%) | 812 (31.5%) | 311 (71.0%) |
Reoperation for bleeding | 14 (4.6%) | 57 (2.2%) | 118 (26.9%) |
Lung dysfunction | 58 (19.1%) | 280 (10.9%) | 178 (40.6%) |
Low cardiac output | 54 (17.8%) | 239 (9.3%) | 149 (34.0%) |
Cardiac arrhythmia | 37 (12.2%) | 193 (7.5%) | 64 (14.6%) |
Coma | 2 (0.7%) | 15 (0.6%) | 18 (4.1%) |
Stroke | 3 (1.0%) | 19 (0.7%) | 11 (2.5%) |
Acute kidney failure | 4 (1.3%) | 26 (1.0%) | 41 (9.4%) |
Kidney dysfunction | 16 (5.3%) | 103 (4.0%) | 21 (4.8%) |
Sepsis | 2 (0.7%) | 7 (0.3%) | 17 (3.8%) |
Pneumonia | 3 (1.0%) | 17 (0.7%) | 31 (7.8%) |
Sternal wound infection | 2 (0.7%) | 7 (0.3%) | 8 (1.8%) |
Death | 4 (1.3%) | 26 (1.0%) | 28 (6.4%) |
Mechanical ventilation > 1 day | 50 (16.5%) | 206 (8.0%) | 166 (37.9%) |
Intensive care > 5 days | 30 (5.2%) | 135 (9.9%) | 128 (29.2%) |