Table 1.
Baseline characteristics of adult surgical intensive care unit patients (n=500) to investigate the association of red cell distribution width at initiation of critical care and 90-day mortality.
| RDW: >14.5% (n = 237) |
RDW: 11.5%–14.5% (n = 263) |
P- value |
|
|---|---|---|---|
| Age (years) | 65 ± 16 | 60 ± 18 | 0.001 |
| Sex (%) | 0.28 | ||
| Female | 20 | 17 | |
| Male | 27 | 36 | |
| Race (%) | 0.78 | ||
| Non-white | 20 | 24 | |
| White | 27 | 29 | |
| BMI (kg/m2) | 28 ± 7 | 27 ± 6 | 0.09 |
| NRS 2002 | 5 ± 1 | 4 ± 1 | <0.001 |
| DCCI | 3 ± 3 | 3 ± 3 | - |
| APACHE II | 19 ± 9 | 16 ± 8 | <0.001 |
| Creatinine (mg/dL) | 1.6 ± 1.5 | 1.2 ± 2.1 | 0.01 |
| Albumin (g/dL) | 3.0 ± 0.7 | 3.3 ± 0.7 | <0.001 |
| MCV (fL) | 90 ± 9 | 90 ± 7 | - |
| CRP* (mg/L) | 135 ± 94 | 132 ± 90 | 0.78 |
| RDW (%) | 17.1 ± 4.3 | 13.5 ± 0.7 | <0.001 |
| Hospital LOS (days) | 23 (14–40) | 21 (13–33) | 0.07 |
| 90-day mortality (%) | 0.01 | ||
| Alive | 28 | 44 | |
| Dead | 19 | 9 |
RDW = red cell distribution width; BMI = body mass index; NRS = Nutrition Risk Screening; DCCI = Deyo-Charlson Comorbidity Index; APACHE = acute physiologic and chronic health evaluation; MCV = mean corpuscular volume; CRP = C-reactive protein; LOS = length of stay. Data are presented as either mean ± standard deviation, median (interquartile range), or proportions, and compared using t-tests, log-rank tests, and chi-square tests, respectively. Statistically significant p-values are shown in bold.
(*) Data for CRP is based on the 300 patients in whom levels were measured at initiation of critical care