TABLE 1

Background Characteristics of Participating Children

nGA GroupP
MPT (3207 to 336/7 Weeks)LPT (3407 to 366/7 Weeks)ET (3707 to 386/7 Weeks)FT(3907 to 416/7 Weeks)
ASQ form, n (%).799
 8 mo86442 (4.9)87 (10.1)274(31.7)461 (53.4)
 18 mo80335 (4.4)78 (9.7)272 (33.9)418 (52.1)
 Total166777 (4.6)165 (9.9)546 (32.7)879 (52.8)
Birth weight, mean (SD), g16551879 (504)2532 (548)3188 (414)3488 (400)<.001
Male gender, n (%)166748 (62.3)89 (53.9)258 (47.3)416 (47.3).034
811 (48.7)
Socioeconomic status: medium-low (vs medium-high), n (%)166743 (55.8)70 (42.4)363 (66.5)591 (67.2)<.001
1067 (64.0)
Adolescent mother, n (%)16679 (11.7)15 (9.1)81 (14.8)137 (15.6).154
242 (14.5)
NICU admission, n (%)166772 (93.5)87 (52.7)59 (10.8)61 (6.9)<.001
279 (16.7)
Multiple pregnancies, n (%)166736 (46.8)46 (27.9)11 (2.0)4 (0.5)<.001
67 (5.8)
Small for GA, n (%)165530 (39.0)50 (30.3)64 (11.9)88 (10.1)<.001
232 (14.0)