Table 3.

Demographic Information Collected From Those Who Completed the Primary Caregiver Phone Interview for Enrolled Families, According to Enrollment Site, Study to Explore Early Development, United States, 2007–2011

	Enrollment Site						Total (n = 2,989),%a
Demographic Factor	California (n = 462), %a	Colorado (n = 550), %a	Georgia (n = 585), %a	Maryland (n = 425), %a	North Carolina (n = 540), %a	Pennsylvania (n = 427), %a
Total household income before taxes (previous 12 months), $b
<30,000	14	22	23	22	20	23	21
30,000–70,000	16	29	23	23	30	26	25
70,000–110,000	22	27	23	26	29	19	24
>110,000	34	21	28	27	18	30	26
Missing	14	2	3	3	2	1	4
Language spoken at home
English	71	84	94	98	97	95	90
Spanish	16	13	2	<1	1	<1	5
Other	12	3	4	2	2	5	5
Missing	<1	<1	<1	0	<1	<1	<1
No. of adults in the household (previous 12 months)
1	7	7	15	15	12	13	12
2	73	85	76	76	81	79	78
≥3	16	7	9	9	7	8	9
Missing	3	<1	<1	0	1	<1	1
No. of other siblings with special needs
0	87	71	85	79	86	70	80
1	10	22	10	16	11	20	15
≥2	1	5	4	4	3	9	4
Missing	2	2	2	1	0	1	1

^aTotals may not sum to 100% due to rounding.

^bInstrument was designed with overlapping income ranges. Ranges are presented as offered to respondents.