Table 2.

Maternal and Child Characteristics by Sex (N=1,334 mother-child pairs)

		All Children				Boys (N=701)				Girls (N=633)
Maternal or Child Characteristic		Mean	SD	Min	Max	Mean	SD	Min	Max	Mean	SD	Min	Max	pc
Mother	Age [years]	31	5	18	45	31	5	18	45	31	5	18	45	0.90
	Weight [kg]	69	13	42	147	69	13	45	147	69	1	42	121	0.86
	Parity [count]	1.8	1	1	10	1.8	1	1	6	1.8	1	1	10	0.67
	Serum Cotinine [ng/mL]a	0.2	26	0	366	0.2	27	0	339	0.3	26	0	366	0.37
	Prenatal Sample Collection [weeks]	10	2	4	27	10	2	4	27	10	2	4	18	0.54
	Prenatal PFOAa [ng/mL]	1.6	1.8	0.2	21.2	1.6	1.7	0.2	13.4	1.6	1.8	0.3	21.2	0.48
Child	Birth Weight [g]	3,617	551	960	5695	3659	571	960	5480	3570	524	1650	5695	<0.01
	Gestational Age (weeks)	39	2	28	43	39	2	28	43	40	2	29	43	0.22
	Postnatal Weight Observations [N]b	12	2	8	15	12	2	8	15	12	2	8	15	0.20

^aGeometric mean and standard deviation reported

^bNumber of weight observations available for each child

^cp-value based on t-test for differences between sexes