Table 2.
Comorbidities and Operative Variables for Those With and Without Preoperative Anemia.a
| Nonanemic, N = 367 | Anemic, N = 106 | ||||
|---|---|---|---|---|---|
| n | % | n | % | P | |
| Comorbidities | |||||
| Pulmonary comorbidity | 24 | 6.54% | 9 | 8.49% | .4873 |
| Cardiac comorbidity | 190 | 51.77% | 66 | 62.26% | .0562 |
| Peripheral vascular disease | 5 | 1.36% | 3 | 2.83% | .3019 |
| Diabetes | 49 | 13.35% | 31 | 29.25% | .0001 |
| Neuromuscular injury | 27 | 7.36% | 15 | 14.15% | .0303 |
| Stroke | 13 | 3.54% | 10 | 9.43% | .013 |
| Steroid use | 13 | 3.54% | 5 | 4.72% | .5576 |
| Recent weight loss | 1 | 0.27% | 0 | 0.00% | .5906 |
| Bleeding disorder | 6 | 1.63% | 7 | 6.60% | .0058 |
| Operative Variables and Labs | Mean | SD | Mean | SD | |
| Albumin | 4.2 | 0.4 | 3.49 | 0.6 | <.0001 |
| HCT | 42.07 | 3.14 | 34.42 | 3.66 | <.0001 |
| PTT | 29.23 | 4.39 | 30.12 | 5.81 | .1976 |
| INR | 1 | 0.12 | 1.06 | 0.16 | .0019 |
| Total RVU | 54.17 | 27.71 | 53.99 | 31.74 | .9549 |
| Procedure Subtypes | n | % | n | % | |
| Multilevel fusion | 250 | 68.12% | 72 | 67.92% | .9697 |
| Operative time >4 hours | 102 | 27.79% | 34 | 32.08% | .3908 |
Abbreviation: HCT, hematocrit; PTT, partial thromboplastin time; INR, international normalized ratio; RVU, relative value unit.
aBold values represent P < .05.