Preoperative medical and cardiac surgical characteristics of CABG surgery cluster subtypes
| Variable | Cluster subgroup | Critical value* | ||
|---|---|---|---|---|
| Memory spared (n = 41) | Retrieval deficit (n = 30) | Encoding deficit (n = 14) | ||
| CCS score, Canadian Cardiovascular Society score (n = 73); CPB time, cardiopulmonary bypass time; diabetes, n = 79; hypertension, n = 79; Interventions, number of perfusionist interventions; LVF, left ventricular function (n = 75); MCPP, mean cerebral perfusion pressure; Mflow, mean blood flow rate; Rhythm, spontaneous return to sinus rhythm. | ||||
| †χ2 test (asymptotic two sided), df = 2 (except LVF df = 4). All other comparisons one way ANOVA F(2, 82), except MAP F(2, 73) and ICU stay F(2, 80). | ||||
| *All p>0.05. | ||||
| Preoperative | ||||
| Hypertension (yes/no) | 16/21 | 14/15 | 9/4 | 2.62† |
| Diabetes (yes/no) | 7/30 | 5/24 | 2/11 | 0.90† |
| LVF (normal/altered/poor) | 21/9/5 | 18/7/1 | 9/5/0 | 3.98† |
| CCS score (⩽2/⩾3) | 13/19 | 15/13 | 8/5 | 1.95† |
| Surgical | ||||
| Grafts | 2.4 (0.7) | 2.3 (0.8) | 2.6 (1.0) | 0.61 |
| Cross clamp time (min) | 23.2 (9.0) | 22.4 (7.9) | 26.1 (9.7) | 0.84 |
| CPB time (min) | 42.8 (15.5) | 41.9 (15.2) | 45.7 (17.5) | 0.28 |
| MCCP (mm Hg) | 42.4 (6.2) | 42.5 (4.5) | 39.9 (5.4) | 1.30 |
| Mflow (l/min) | 3.8 (0.4) | 3.8 (0.4) | 3.9 (0.5) | 0.36 |
| Interventions | 5.7 (2.8) | 4.9 (2.2) | 7.1 (4.1) | 2.96 |
| Hypothermic/normothermic | 19/22 | 17/13 | 6/8 | 0.90† |
| Rhythm (yes/no) | 29/12 | 24/6 | 11/3 | 1.03† |
| ICU stay (h) | 31.4 (16.1) | 32.7 (23.0) | 34.4 (22.9) | 0.13 |