Table 1.

Comparison of children followed up with original birth cohort population, Mount Sinai Medical Center, New York, New York, USA, 1998–2008.

	Original birth cohort (n = 404)		Children followed up (n = 188)a
Population characteristics	n	Percent	n	Percent	p-Value
Maternal age at enrollment (years)					0.04
< 20	142	35.2	58	30.9
20–24	132	32.7	62	33.0
25–29	44	10.9	29	15.4
≥ 30	86	21.3	39	20.7
Maternal race/ethnicity					0.92
White	86	21.3	38	20.2
Black	112	27.7	55	29.3
Hispanic	200	49.5	92	48.9
Other	6	1.5	3	1.6
Maternal education					0.09
< High school	118	29.2	46	24.5
High school	83	20.5	40	21.3
Some college	103	25.5	57	30.3
≥ College degree	100	24.8	45	24.0
Marital status at enrollment					0.10
Married	117	29.0	47	25.0
Living with father of child	98	24.3	42	22.3
Single/divorced/widowed	189	46.8	99	52.7
Smoke during pregnancy (ever)	67	16.6	31	16.9	0.86
Alcohol during pregnancy (ever)	59	14.9	28	15.6	0.78
LMWP (μM/L) (n = 177)	2.24b	0.90–5.65c	1.88b	0.83–4.59c	0.15
HMWP (μM/L) (n = 177)	0.43b	0.22–0.91c	0.43b	0.18–0.90c	0.54
Mother is primary caretaker			151	83.0
Breast-feeding of child (months)
< 1			70	40.0
1–4			38	21.7
> 4			67	38.3
Retention at each interview period (years)
4.5–5.5			102	54.3
6–6.5			113	60.1
7–9			146	77.7

^aIncludes five children who were not included in the birth cohort analyses because they were not born at Mount Sinai.

^bMedian.

^cInterquartile range.