Association between small-for-gestational age and poor school performance in 2 500 000 children born 1973-2002.

Aim: To examine the association between infant weight for gestational age and school performance when leaving school at 16 years of age.

Methods: Out of 2 525 571 infants born near- or at term, between 1 January 1973 and 31 December 2002, identified from the Swedish Medical Birth Register, 65 912 (2.6%) were born small-for-gestational age (SGA).