Table 2.
Laboratory variables of the study patients.
| Variables | All patients (n = 1334) | Stroke group | Group without stroke | p value |
|---|---|---|---|---|
| Preoperative variables | ||||
| Hemoglobin (gm/L) | 119 (104, 137) | 108 (99, 127) | 121 (105,137) | < 0.001 |
| Hematocrit (%) | 38 (33, 42) | 34 (31, 39) | 39 (33, 42) | < 0.001 |
| Platelet count (109/L) | 228.5 (170, 278) | 223 (160, 284) | 229 (171, 278) | 0.513 |
| White blood cells (109/L) | 7.54 (5.68, 10.36) | 8.39 (6.06, 11.7) | 7.48 (5.66, 10.16) | 0.043 |
| INR | 1.2 (1.1, 1.4) | 1.3 (1.1, 1.6) | 1.2 (1.1, 1.4) | 0.043 |
| Fibrinogen (g/L) | 2.95 (2.39, 3.51) | 2.78 (2.22, 3.29) | 2.96 (2.4, 3.56) | 0.132 |
| Serum creatinine (umol/L) | 80 (65, 104) | 85 (67,107) | 80 (65,103) | 0.221 |
| Serum bilirubin (umol/L) | 10.7 (6.4, 19) | 13 (7, 24) | 10.3 (6.3, 19) | 0.025 |
| Blood urea (mmol/L) | 5.9 (4.5, 8.8) | 6.3 (4.9, 9.6) | 5.8 (4.5, 8.8) | 0.182 |
| Serum Na (mmol/L) | 140 (137, 142) | 140 (135, 143) | 140 (138, 142) | 0.619 |
| Albumin (gm/L) | 39.2 (35, 42.6) | 36.3 (31, 39.2) | 39.5 (35.6, 42.8) | < 0.001 |
| Postoperative variables | ||||
| Peak blood lactate (mmol/L) | 6.8 (5.4, 9.4) | 11.4 (8.2, 15.7) | 6.4 (5.3, 8.6) | < 0.001 |
| Lactate at 24 h (mmol/L) | 1.7 (1.3, 2.4) | 3.1 (1.9, 4.7) | 1.6 (1.3, 2.3) | < 0.001 |
| Hemoglobin-D1 (gm/L) | 97 (87, 107) | 93 (84.5, 103) | 97 (87, 107) | 0.015 |
| Hematocrit-D1 (%) | 30 (27, 32) | 28 (26, 31) | 30 (27, 32) | 0.003 |
| Hemoglobin-D2 (gm/L) | 92 (85, 101) | 88 (79, 100) | 92 (85, 101) | < 0.001 |
| Platelet count-D1 (109/L) | 148 (105.5, 197) | 124 (80, 170) | 151 (108, 198) | < 0.001 |
| Platelet count-D2 (109/L) | 134 (97, 171) | 113 (77, 152) | 136 (101, 173) | < 0.001 |
| aPTT-D1 | 38.2 (35.1, 42.9) | 42.55 (36.5, 54) | 38 (35, 41) | < 0.001 |
| aPTT-D2 | 42 (38.2, 52) | 42 (38.6, 47.5) | 42 (38.2, 52.3) | 0.95 |
| Fibrinogen-D1 (g/L) | 3 (2.5, 3.66) | 2.7 (2.23, 3.29) | 3.01 (2.52, 3.69) | 0.001 |
| Fibrinogen-D2 (g/L) | 3.79 (2.88, 4.84) | 3 (2.45, 4.01) | 3.88 (2.93, 4.92) | < 0.001 |
| Serum creatinine-D1 (umol/L) | 83 (67, 114) | 88 (74, 124) | 83 (67, 114) | 0.105 |
| Serum bilirubin-D1 (umol/L) | 18.6 (10.9, 29.7) | 24.25 (13.9, 37.5) | 18 (10.7, 28.5) | < 0.001 |
| Blood urea-D1 (mmol/L) | 6.3 (4.9, 9.4) | 7.2 (5.15, 9.85) | 6.2 (4.8, 9.4) | 0.068 |
| Blood urea-D2 (mmol/L) | 7.6 (5.3, 12) | 8.2 (6.7, 11.8) | 7.5 (5.2, 12) | 0.033 |
| Albumin-D1 (gm/L) | 37 (34.1, 40.6) | 34.45 (30.7, 38) | 37 (34.3, 40.7) | < 0.001 |
| Albumin-D2 (gm/L) | 37.3 (34.5, 40.2) | 35 (31.8, 38) | 37.6 (34.8, 40.4) | < 0.001 |
Note: Data are presented as median with the 25th and 75th quartiles.
Abbreviations: APTT, activated partial thromboplastin time; INR, international normalized ratio.