Fig. 2: Adjusted odds ratio for below average subject performance.

Odds ratio for student to have below average performance as rated by the teacher from kindergarten through fifth grade in subjects: reading for A 32–34 6/7 weeks gestation children and B 35–36 6/7 weeks gestation children; mathematics for C 32–34 6/7 weeks gestation children and D 35–36 6/7 weeks gestation children; and science for E 32–34 6/7 weeks gestation children and F 35–36 6/7 weeks gestation children. Higher number indicates worse performance. Analyses were adjusted for gender, race, household income level, school type, and home setting. K stands for Kindergarten.