TABLE 4.

Independent Effects of Sociodemographic Factors on Risk of CP in a Multivariable Model

	OR	95% CI
Ethnicitya
White	1.0	Ref
Indian	0.6	0.4–0.8
Pacific Islander	0.6	0.4–1.0
East Asian	0.8	0.7–0.9
Southeast Asian	0.7	0.6–0.8
Filipino	0.9	0.8–1.0
Samoan	1.5	0.96–2.3
Maternal age, y
<18	0.9	0.7–1.1
18–34	1.0	Ref
≥35	1.3	1.2–1.4
Maternal education, y
Primary school or none (0–5)	1.4	1.0 – 1.8
Secondary school (6–11)	1.3	1.1 – 1.4
High school graduate (12)	1.2	1.1 – 1.3
Some college (13–15)	1.1	1.0 – 1.2
College graduate (≥16)	1.0	Ref
Boy	1.4	1.3–1.5
Birth weight category
Very low (400–1499 g)	27	25–30
Moderately low (1500–2499 g)	5.4	4.9–5.9
Normal (2500–4499 g)	1.0	Ref
High (≥4500 g)	0.9	0.7–1.2

^aLogistic regression model includes all variables in the table.