Table 2.
Neonatal characteristics of children who were included in the INTERGROWTH-21st Preterm Postnatal Growth Standards22 who were evaluated at 2 years of age compared with children lost to follow-up
| Characteristic | Evaluated at 2 years of age (n=143) | Not evaluated at 2 years of agea (n=24) |
|---|---|---|
| Gestational age at delivery, wkb | 35.5±1.6 | 35.7±1.4 |
| Birthweight, kgb | 2.5±0.5 | 2.4±0.5 |
| Birth length, cmb | 45.7±2.7 | 45.6±2.3 |
| Head circumference, cmb | 31.8±1.7 | 31.8±1.5 |
| Apgar at 5 minb | 9.2±0.9 | 9.2±1.2 |
| Age at hospital discharge, dc | 4 (2–9) | 4 (2–7) |
| Early preterm, <34 weeks gestation, n (%) | 19 (13.3) | 3 (12.5) |
| Boys, n (%) | 73 (51.0) | 8 (33.3) |
| Neonatal intensive care unit stay >1 but <3 d, n (%) | 59 (41.3) | 11 (45.8) |
| Hyperbilirubinemia, n (%) | 29 (20.3) | 3 (12.5) |
| Respiratory distress syndrome, n (%) | 20 (14.0) | 6 (25.0) |
| Transient tachypnea of the newborn infant, n (%) | 23 (16.1) | 1 (4.2) |
| Exclusive breastfeeding at discharge, n (%) | 106 (74.1) | 19 (79.2) |
Villar et al. Validation of the INTERGROWTH-21st fetal growth standards. Am J Obstet Gynecol 2018.
a
Children lost to follow-up before evaluation at 2 years of age
b
Data are given as mean±standard deviation
c
Data are given as median (interquartile range).