Table 4: Medical and developmental characteristics of preterm children with positive versus negative screening for autism spectrum disorder.

Children with positive screeningChildren with negative screeningGroup differences

Gestational age (weeks) (n=100)
 M (SD), range30.34 (2.77), 24.71-3431.74 (2.35), 24.29-34PS < NS

Birth weight (grams) (n=100)
 M (SD), range1352.16 (470.46), 510-22841661.22 (444.23), 490-2400PS < NS

MSEL 18 months (n=100)
 M (SD), range88.44 (10.98), 70-12298.72 (11.77), 69-126PS < NS

MSEL 24 months (n=96)
 M (SD), range95.94 (14.06), 61–118109.81 (14.51), 65–139PS < NS

MSEL 36 months (n=94)103.03 (18.58), 49–137
 M (SD), range115.03 (13.47), 70–141PS < NS

Note. MSEL: Mullen Scales of Early Learning, PS: positive screening, and NS: negative screening. p <. 05, p < .01.