Table 5.

Regression Models of Bayley III Cognitive and Language Composite Scores by Object Permanence Score, Treatment Group and Demographic Characteristics

Characteristic	Cognitive Composite		Language Composite
	Adjusted mean difference (SE)	p	Adjusted mean difference (SE)	P
Object Permanence Score	5.80 (0.45)	< 0.001	4.42 (0.62)	< 0.001
Ventilation
Early Extubation and CPAP	1.14 (1.01)	0.264	0.53 (1.36)	0.701
Early Surfactant and Ventilation	REF		REF
Oxygen level
High target SpO2 (91-95%)	0.27 (1.01)	0.794	−0.12 (1.38)	0.929
Low target SpO2 (85-89%)	REF		REF
Gestational age	0.56 (0.52)	0.293	0.99 (0.71)	0.170
Male	−2.81 (0.97)	0.006	−4.17 (1.34)	0.003
IVH III-IV/cPVL	−3.87 (1.42)	0.009	−0.86 (1.94)	0.660
Severe ROP	4.52 (1.67)	0.010	3.18 (2.28)	0.170
BPD	−3.68 (1.15)	0.003	−3.34 (1.57)	0.040
Corrected age at follow-up visit	−0.74 (0.23)	0.002	−0.34 (0.33)	0.301
Education
Less than high school	−1.68 (1.34)	0.216	−5.23 (1.81)	0.006
High school	−2.36 (1.19)	0.055	−4.10 (1.61)	0.015
Some college or more	REF		REF
Race/Ethnicity
Black	−0.23 (1.32)	0.862	−2.18 (1.79)	0.231
White	REF		REF
Hispanic	−0.54 (1.57)	0.733	−6.15 (2.13)	0.006
Other/Unknown	−2.36 (2.96)	0.431	−1.13 (4.12)	0.785

Note: REF=reference category. N=511 for cognitive composite model and N=503 for language composite model. Mean differences are adjusted for research center, object permanence score, ventilation type, oxygen level, gestational age, gender, IVH III-IV/cPVL, severe ROP, BPD, corrected age at follow-up, maternal education, and race/ethnicity.