Table 2:
Enteral iron and transfusion exposure within the cohort
| Iron exposure at 28 days | Enteral | Parenteral |
|---|---|---|
| Receipt of any iron supplementation, n (%) | 623 (76%) | 454 (55%) |
| Total cumulative iron exposure among all infants, median mg (IQR) | 34.7 (2.6, 78.8) | 1.2 (0, 3) |
| Total cumulative iron exposure among all infants, median mg/kg (IQR) | 39.5 (2.6, 82.8) | 1.5 (0, 3.5) |
| Total cumulative iron exposure among only infants receiving supplementation, median mg (IQR) | 55 (24.5, 93.3) | 2.9 (1.6, 4.8) |
| Total cumulative iron exposure among only infants receiving supplementation, median mg/kg (IQR) | 58.5 (27.7, 94.6) | 3.10 (1.8, 5.8) |
| Duration of supplementation among infants receiving supplementation, median d (IQR) | 13 (7, 18) | 2 (2, 4) |
| Iron exposure at 36 weeks | ||
| Receipt of any iron supplementation, n (%) | 798 (97%) | 474 (58%) |
| Total cumulative iron exposure among all infants, median mg (IQR) | 334 (202.7, 458.4) | 1.3 (0, 3.9) |
| Total cumulative iron exposure among all infants, median mg/kg (IQR) | 231.3 (144.4, 327.6) | 1.5 (0, 4.4) |
| Total cumulative iron exposure among infants receiving supplementation, median mg (IQR) | 342.9 (213.6, 466) | 3.1 (1.8, 6.6) |
| Total cumulative iron exposure among infants receiving supplementation, median mg/kg (IQR) | 235.8 (151.9, 329.7) | 3.6 (2.6, 7.0) |
| Duration of supplementation among infants receiving supplementation, median d (IQR) | 51 (37, 60) | 3 (2, 5) |
| RBC transfusions | ||
| Receipt of any packed red blood cell transfusions, n (%) | 670 (82%) | |
| Total cumulative volume transfused among all infants, median mL (IQR) at 28 days | 29 (12, 55) | |
| Total cumulative volume transfused among all infants, median mL/kg (IQR) at 28 days | 37 (15, 72) | |
| Total cumulative volume transfused among all infants, median mL (IQR) at 36 weeks | 45 (15, 85) | |
| Total cumulative volume transfused among all infants, median mL/kg (IQR) at 36 weeks | 47 (16, 95) | |