Table 2.

Indicators of Prematurity and School Readiness Outcomes at Ages 4–5 (N=8,060; Weighted; Standard Errors in Parentheses)

A: Birth Weight

(Ref: Normal Birth Weight)	PPVT^a Score	WAI^b Score	SDQ^c: Pro-Social Scale	SDQ^c: Externalizing Behaviors Scale

Moderately Low Birth Weight (1.5–2.49kg)	−0.11 (0.06)	−0.23^* (0.05)**	−0.03 (0.06)	−0.02 (0.06)
Very Low Birth Weight (<1.5kg)	−0.40^ (0.15)**	−0.55^* (0.13)**	−0.12 (0.13)	0.15 (0.16)
Preschool Attendance	0.13^* (0.03)**	0.24^* (0.03)**	−0.07 (0.04)	0.01 (0.03)

B: Gestational Age

(Ref: Term)	PPVT^a Score	WAI^b Score	SDQ^c: Pro-Social Scale	SDQ^c: Externalizing Behaviors Scale
Moderately Preterm (32–37wks)	−0.03 (0.05)	−0.16^ (0.05)**	−0.02 (0.06)	−0.05 (0.06)
Very Preterm (<32wks)	−0.16 (0.09)	−0.46^* (0.09)**	−0.18 (0.10)	0.07 (0.10)
Preschool Attendance	0.13^* (0.03)**	0.24^* (0.03)**	−0.07 (0.04)	0.01 (0.04)

C: Small for Gestational Age

(Ref: Appropriate for Gestational Age)	PPVT^a Score	WAI^b Score	SDQ^c: Pro-Social Scale	SDQ^c: Externalizing Behaviors Scale
Small for Gestational Age	−0.10^* (0.05)	−0.09^* (0.04)	0.06 (0.04)	0.07 (0.04)
Preschool Attendance	0.13^* (0.03)**	0.24^* (0.03)**	−0.07 (0.04)	0.10 (0.03)

Note: All regression analyses controlled for hours of preschool attendance each week, duration of preschool attendance, receiving child care benefit, child age at the time of assessments, gender, multiple birth, maternal age at child birth, maternal immigration status, aboriginal status or Torres Strait islander, prenatal drinking, prenatal smoking, diabetes during pregnancy, high blood pressure during pregnancy, average weekly household income, maternal education, family structure, speaking non-English at home, and states.

PPVT = Peabody Picture Vocabulary Test

WAI = Who Am I?

SDQ = Strength and Difficulties Questionnaire

p<0.05,

^**

p<0.01,

^***

p<0.001