Table 1.

Sample Descriptive Statistics for Children with Oral Clefts and Their Classmates

Variable	Children with Oral Clefts		Classmates
	N	%	N	%
Oral Clefts
All Cleft Types	586	100
CL only	218	37.2
CP only	135	23.0
CLP	233	39.8
Child sex
Female	248	42.3	798	42.6
Male	338	57.7	1075	57.4
Child first born
No	360	61.4	1163	62.1
Yes	226	38.6	710	37.9
Child birth weight (grams)
<2500	34	5.8	100	5.3
2500–4000	467	79.7	1511	80.7
>4000	85	14.5	262	14.0
Apgar score < 7
No	510	87.0	1662	88.7
Yes	74	12.6	210	11.2
Missing	2	0.3	1	0.1
Mother married
No	118	20.1	361	19.3
Yes	467	79.7	1504	80.3
Missing	1	0.2	8	0.4
Maternal age (years)
< 20	59	10.1	172	9.2
20–25	181	30.9	584	31.2
26–35	295	50.3	972	51.9
> 35	51	8.7	144	7.7
Missing			1	0.1
Maternal education
< High school	78	13.3	216	11.5
High school or some college	402	68.6	1278	68.2
≥4 years of college	101	17.2	368	19.7
Missing	5	0.9	11	0.6
Prenatal visits
≤6	25	4.3	84	4.5
7–9	77	13.1	221	11.8
10–12	272	46.4	952	50.8
13–15	155	26.5	449	24.0
≥15	40	6.8	125	6.7
Missing	17	2.9	42	2.2
N	586		1873

Notes: The Table reports the percentages of the demographic, socioeconomic, and health variables for children with testing data in at least one academic domain.