TABLE 1.

LTLs and Descriptive Data for Trios With Complete Data

Variable	N	Mean	SD	Minimum	Median	Maximum
Newborn LTL	490	9.50	0.70	7.01	9.50	11.6
Mother LTL	490	7.92	0.67	6.19	7.89	9.81
Father LTL	490	7.70	0.71	5.83	7.66	9.88
Maternal age, y	490	28.4	5.5	17	29	42
Paternal age, y	490	30.7	6.6	17	30	56
Birth weight, g	490	3337	534	970	3340	4880
Length of gestation, wka	462	39.7	1.93	29.6	40	44.3

^aAny lengths of gestation estimated to be >45 weeks (n = 3) were excluded.