Table 1 –
Patient characteristics according to preoperative anemia category*
| None (N=2883) | Mild (N=1092) | Moderate severe (N=142) | |
|---|---|---|---|
| Age, years | 68.5 (59.3, 76.3) | 72.6 (63.7, 79.2) | 69.6 (63.0, 76.6) |
| Sex | |||
| Female | 1349 (47%) | 373 (34%) | 65 (46%) |
| Male | 1534 (53%) | 719 (66%) | 77 (54%) |
| BSA, m2 | 1.9 (1.8, 2.1) | 2.0 (1.8, 2.1) | 1.9 (1.8, 2.0) |
| Ejection fraction, percent; n=2708/1032/135 | 62 (56, 66) | 61 (55, 66) | 62 (56, 65) |
| NYHA class, n=2367/922/126 | |||
| 1 | 360 (15%) | 132 (14%) | 19 (15%) |
| 2 | 1015 (43%) | 367 (40%) | 55 (44%) |
| 3 | 887 (37%) | 384 (42%) | 50 (40%) |
| 4/5 | 105 (4%) | 39 (4%) | 2 (2%) |
| Smoking history | |||
| Current | 246 (9%) | 84 (8%) | 12 (8%) |
| Former | 1083 (38%) | 484 (44%) | 70 (49%) |
| Never | 1554 (54%) | 524 (48%) | 60 (42%) |
| History of moderate/severe kidney disease | 232 (8%) | 317 (29%) | 59 (42%) |
| History of MI | 270 (9%) | 172 (16%) | 20 (14%) |
| History of CVA | 215 (7%) | 139 (13%) | 23 (16%) |
| History of DM | 613 (21%) | 391 (36%) | 59 (42%) |
| Preoperative hemoglobin, g/dL | 13.8 (13.2, 14.5) | 11.7 (11.0, 12.2) | 9.3 (8.9, 9.7) |
| Preoperative creatinine, mg/dL | 1.0 (0.8, 1.1) | 1.1 (0.9, 1.4) | 1.2 (0.9, 2.0) |
| Preoperative platelet count, x 109/L | 209 (176, 248) | 205 (166, 260) | 213 (154, 287) |
| Type of procedure | |||
| Valve | 2043 (71%) | 734 (67%) | 103 (73%) |
| CABG | 840 (29%) | 358 (33%) | 39 (27%) |
| Total Bypass Time, minutes | 78 (55, 102) | 84 (63, 111) | 83 (62, 112) |
*
Preoperative anemia defined as moderate/severe (<10 g/dL), mild (10 to 12 g/dL and 10 to 13 g/dL for females and males respectively). Values are median (Q1, Q3) for continuous variables and number (percent) for categorical variables. When not all data are available, numbers with complete information are presented.
BSA = body surface area; NYHA = New York Heart Association; MI = myocardial infarction; CVA = cerebrovascular accident; DM = diabetes mellitus.