Table 3.
Sensitivity analysis
| Lowest Hb during hospitalization <12 g/dL (n = 132) |
Lowest Hb during hospitalization ≥12 g/dL (n = 226) |
P-value | Adjusted OR (95% CI) |
Adjusted P-value |
|
| Male, n (%) | 64 (48) | 129 (57) | 0.12 | 0.92 (0.48-1.78) | 0.82 |
| Gestational age (weeks), median (IQR) | 33.4 (31.7-34.2) | 35.0 (34.1-35.4) | <0.001 | 0.48 (0.33-0.70) | <0.001 |
| SGA, n (%) | 36 (27) | 39 (13) | 0.03 | 4.24 (1.60-11.2) | 0.004 |
| Caesarian section, n (%) | 112 (85) | 157 (69) | <0.001 | 1.03 (0.43-2.47) | 0.95 |
| Twin birth, n (%) | 31 (23) | 53 (23) | 0.99 | 0.88 (0.40-1.95) | 0.76 |
| Placental abruption | 6 (4.5) | 8 (3.5) | 0.64 | 1.52 (0.35-6.66) | 0.58 |
| Maternal Hb before birth (g/dL), mean (SD) | 10.8 (1.5) | 11.0 (1.3) | 0.14 | 0.92 (0.72-1.17) | 0.52 |
| Laboratory data at birth | |||||
| Hb (g/dL), mean (SD) | 16.2 (2.3) | 17.3 (2.0) | <0.001 | 0.52 (0.42-0.65) | <0.001 |
| MCV (fL), mean (SD) | 110 (6.7) | 108 (5.6) | <0.001 | 1.01 (0.95-1.07) | 0.77 |
| MCHC (%), mean (SD) | 34.1 (1.1) | 34.3 (1.0) | 0.009 | 1.00 (0.95-1.06) | 0.86 |
| Ret (×104/μL), mean (SD) | 26.2 (7.2) | 24.6 (6.0) | 0.01 | 1.01 (0.95-1.06) | 0.86 |
| High intensity breastfeeding, n (%) | 53 (40) | 50 (22) | <0.001 | 0.84 (0.42-1.70) | 0.63 |
| Treatment for jaundice, n (%) | 102 (77) | 118 (52) | <0.001 | 0.86 (0.36-2.04) | 0.73 |
| Number of blood samplings, median (IQR) | |||||
| Large sampling | 7.5 (6-10) | 3 (2-5) | <0.001 | 1.35 (1.14-1.59) | <0.001 |
| Small sampling | 13 (10-21) | 9 (7-13) | <0.001 | 1.09 (1.02-1.16) | 0.01 |
SGA, small for gestational age; Hb, hemoglobin; MCHC, mean corpuscular hemoglobin concentration; MCV, mean corpuscular volume; Ret, absolute reticulocyte count