Table 2.
Hematologic features at birth by bronchopulmonary dysplasia status
| Variables | Infants without BPD(n = 55) | Infants with moderate or severe BPD (n = 60) | P value |
|---|---|---|---|
| WBC count,109/l | 9.12 (6.28–15.89) | 11.2 (6.9–20.9) | 0.141 |
| RBC count,1012/l | 4.22 (3.74–4.59) | 4.2 (3.9–4.5) | 0.523 |
| platelet count,109/l | 194.00 (131.00–245.00) | 228 (189–259)** | 0.004 |
| Neutrophils count,109/l | 2.95 (1.68–6.46) | 5.0 (2.4–13.1)* | 0.023 |
| lymphocyte count,109/l | 4.14 (3.17–6.94) | 4.1 (3.0–6.7) | 0.675 |
| Eosinophil count,109/l | 0.12 (0.05–0.18) | 0.11 (0.06–0.22) | 0.492 |
| Basophil count,109/l | 0.02 (0.01–0.06) | 0.02 (0.01–0.03) | 0.060 |
| monocyte count,109/l | 0.63 (0.37–1.12) | 0.88 (0.57–1.55)* | 0.026 |
| Neutrophil percentage, % | 37.40 (26.50–57.30) | 49.1 (36.6–63.0)* | 0.032 |
| Lymphocyte percentage, % | 53.45 (33.35–64.83) | 38.5 (29.4–54.3)* | 0.022 |
| Eosinophil percentage, % | 1.20 (0.60–2.03) | 1.1 (0.6–1.6) | 0.845 |
| Basophil percentage, % | 0.30 (0.10–0.50) | 0.2 (0.1–0.3)* | 0.011 |
| Monocyte percentage, % | 6.80 (4.55–8.63) | 8.0 (4.9–10.3)* | 0.040 |
| Hb level, g/l | 161.00 (138.75–179.75) | 156 (143–167) | 0.523 |
| Hematocrit, % | 50.70 (45.40–56.08) | 50 (45–52) | 0.171 |
| MCV, fl | 120.40 (113.35–128.70) | 120 (114–124) | 0.549 |
| MCH, pg | 38.40 (36.05–39.95) | 38 (36–40) | 0.582 |
| MCHC, g/l | 315.00 (306.75–325.50) | 319 (307–326) | 0.910 |
| RDW, % | 16.5 (15.4–17.8) | 15.7 (15.3–16.4) | 0.079 |
| MPV, fl | 9.4 (9.00–9.85) | 9.1 (8.7–9.4)** | 0.002 |
| PDW, % | 16.75 (16.60–17.10) | 16.7 (16.4–17.0) | 0.273 |
Data were displayed as median (interquartile range). *p < 0.05 and **p < 0.01 are compared with no BPD group. WBC white blood cell, RBC red blood cell, Hb hemoglobin, MCV mean corpuscular volume, MCH mean corpuscular hemoglobin, MCHC mean corpuscular hemoglobin concentration, RDW red cell distribution width, MPV mean platelet volume, PDW platelet distribution width