Table I.
Subjects’ demographics and clinical characteristics (n=37).
| Gender | |
|
| |
| Male | 65% (24/37) |
| Female | 35% (13/37) |
|
| |
| Twin gestation | 19% (7/37) |
|
| |
| Ethnicity | |
| Caucasian | 43% (16/37) |
| African American | 14% (5/37) |
| Hispanic | 35% (13/37) |
| Asian | 8% (3/37) |
|
| |
| Measurements at birth | |
| Gestational age (weeks) | |
| Mean±SEM | 28.4±0.48 |
| Median; IQR | 270/7; 260/7–300/7 |
| Birth weight (g) | |
| Mean±SEM | 1,112±69.4 |
| Median; IQR | 1,000; 805–1,202 |
|
| |
| Measurements at transfusion | |
| Post-conceptional age at transfusion (weeks) | |
| Mean±SEM | 32.7±0.58 |
| Median; IQR | 326/7; 301/7–353/7 |
| Mean weight at transfusion (g) | |
| Mean±SEM | 1,403±78.2 |
| Median; IQR | 1,370; 1,045–1,780 |
|
| |
| Ventilation support status at transfusion | |
| Room air | 38% (14/37) |
| Nasal cannula | 30% (11/37) |
| Nasal continuous positive airway pressure | 16% (6/37) |
| Conventional ventilation | 16% (6/37) |
| Inspired fraction of oxygen, mean±SD | 0.26±0.06 |
|
| |
| Feeds and caffeine at transfusion | |
| Receiving enteral feeds prior to transfusion | 78% (29/37) |
| Volume of feeds if receiving (mL/kg/day), mean±SD | 114±53.3 |
| Receiving caffeine at time of transfusion | 59% (22/37) |
|
| |
| Transfusion information | |
| Pre-transfusion Hb level (g/dL), mean±SD | 9.3±1.2 |
| Post-transfusion Hb level (g/dL), mean±SD | 13.0±3.3 |
| Volume of transfusion (mL/kg), mean±SD | 15.3±1.4 |
| Transfusion duration (h), mean±SD | 3.8±0.5 |
SEM: standard error of the mean; IQR: interquartile range; SD: standard deviation; Hb: haemoglobin.