Table 4.

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

Characteristic	Cognitive Composite		Language Composite
	Adjusted mean difference (SE)	p	Adjusted mean difference (SE)	P
Object Permanence Mastery	12.03 (1.10)	< 0.001	8.75 (1.47)	< 0.001
Ventilation
Early Extubation and CPAP	1.55 (1.04)	0.144	0.81 (1.39)	0.562
Early Surfactant and Ventilation	REF		REF
Oxygen level
High target SpO2 (91-95%)	0.09 (1.05)	0.929	−0.19 (1.41)	0.891
Low target SpO2 (85-89%)	REF		REF
Gestational age	0.64 (0.54)	0.246	1.04 (0.72)	0.159
Male	−2.81 (1.01)	0.008	−4.25 (1.36)	0.003
IVH III-IV/cPVL	−4.85 (1.47)	0.002	−1.53 (1.95)	0.439
Severe ROP	3.94 (1.74)	0.029	2.92 (2.32)	0.216
BPD	−4.02 (1.19)	0.002	−3.58 (1.60)	0.031
Corrected age at follow-up visit	−0.60 (0.24)	0.015	−0.22 (0.33)	0.509
Education
Less than high school	−1.73 (1.39)	0.220	−5.35 (1.85)	0.006
High school	−2.14 (1.24)	0.091	−3.99 (1.65)	0.020
Some college or more	REF		REF
Race/Ethnicity
Black	−0.01 (1.36)	0.991	−1.92 (1.83)	0.300
White	REF		REF
Hispanic	−0.81 (1.62)	0.621	−6.25 (2.18)	0.007
Other/Unknown	−2.46 (3.07)	0.428	−1.25 (4.21)	0.768

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 mastery, ventilation type, oxygen level, gestational age, gender, IVH III-IV/cPVL, severe ROP, BPD, corrected age at follow-up, maternal education, and race/ethnicity.