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. Author manuscript; available in PMC: 2022 Feb 28.
Published in final edited form as: N Engl J Med. 2021 Jul 29;385(5):436–444. doi: 10.1056/NEJMoa1913569

Table 3.

Other Neonatal Secondary Outcomes.*

Outcome Hyperimmune Globulin (N = 203) Placebo (N = 191) Difference Relative Risk (95% CI)
All neonates
Gestational age at delivery — wk 38.2±4.1 38.6±3.6 −0.41 (−1.17 to 0.35)
Preterm birth at <37 wk gestation — no. (%) 25 (12.3) 16 (8.4) 1.47 (0.81 to 2.67)
Preterm birth at <34 wk gestation — no. (%) 12 (5.9) 7 (3.7) 1.61 (0.65 to 4.01)
Fetal or neonatal death — no. (%) 10 (4.9) 5 (2.6) 1.88 (0.66 to 5.41)
Termination of pregnancy — no. (%) 5 (2.5) 2 (1.0) 2.35 (0.47 to 21.95)
Live-born infants
Head circumference — cm 33.9±2.1 34.1±1.9 −0.25 (−0.66 to 0.15)
Birth weight — g 3268±657 3303±548 −35 (−157 to 87)
Birth weight <5th percentile — no./total no. (%) 20/194 (10.3) 10/186 (5.4) 1.92 (0.92 to 3.99)
Head circumference <3rd percentile — no./total no. (%) 6/193 (3.1) 5/186 (2.7) 1.16 (0.36 to 3.72)
Grade 3 or 4 intraventricular hemorrhage — no./total no. (%) 1/193 (0.5) 0/186
Ventriculomegaly — no./total no. (%) 1/194 (0.5) 0/186
Retinopathy of prematurity — no./total no. (%) 1/193 (0.5) 1/186 (0.5) 0.94 (0.03 to 31.5)
Respiratory distress syndrome — no./total no. (%) 5/193 (2.6) 10/186 (5.4) 0.48 (0.17 to 1.38)
Chronic lung disease — no./total no. 0/193 0/186
Necrotizing enterocolitis (stage 2 or 3) — no./total no. 0/193 0/186
Hyperbilirubinemia — no./total no. (%) 13/150 (8.7) 19/138 (13.8) 0.63 (0.32 to 1.23)
Suspected sepsis — no./total no. (%) 14/193 (7.3) 16/186 (8.6) 0.84 (0.42 to 1.68)
Confirmed sepsis — no./total no. 0/193 0/186
Pneumonia — no./total no. (%) 1/193 (0.5) 2/186 (1.1) 0.47 (0.17 to 5.23)
Seizures or encephalopathy — no./total no. 0/193 0/186
Median hospital stay (95% CI) — days 2 (2 to 2) 2 (2 to 2) 0
Admission to intermediate or intensive care nursery
 Admission — no./total no. (%) 33/193 (17.1) 25/186 (13.4) 1.27 (0.79 to 2.05)
 Median stay (95% CI) — days 7 (4 to 12) 5 (3 to 10) 1 (−1 to 5)
*

Plus–minus values are means ±SD. Confidence intervals (CI) were not adjusted for multiplicity, so the intervals should not be used to infer definitive treatment effects.

Exact confidence intervals were calculated for rare outcomes with the use of StatXact software (Cytel).