Table 1.

Subject demographic variables between Development and Composite samples

Respondent	Demographic variables	Child			Adolescent
		Development	Composite	P-value	Development	Composite	P-value
Patient	Number of respondents	237	527	–	311	470	–
	The Children's Hospital of Philadelphia	237	–		311	–
	Cincinnati Children's Hospital Medical Center	–	155		–	129
	Children's Hospital Boston	–	97		–	103
	Children's Hospital of Wisconsin	–	114		–	63
	University of California San Francisco Children's Hospital	–	44		–	52
	University of Texas Southwestern Medical Center Dallas	–	97		–	94
	Phoenix Children's Hospital	–	20		–	29
	Age distribution by sample (%)	43.2	52.9	–	56.8	47.1	–
	Gender (% male)	54.0	52.9	0.784	54.7	59.1	0.224
	Race (% Caucasian)	84.2	85.7	0.587	87.3	85.7	0.521
	Ethnicity (% non-Hispanic)	94.9	93.9	0.018	97.4	94.3	0.036
	Age (years, mean)	10.0	9.8	0.071	15.2	15.2	0.694
Parent	Number of respondents	247	547	–	318	471	–
	The Children's Hospital of Philadelphia	247	–		318	–
	Cincinnati Children's Hospital Medical Center	–	161		–	128
	Children's Hospital Boston	–	100		–	105
	Children's Hospital of Wisconsin	–	117		–	65
	University of California San Francisco Children's Hospital	–	49		–	51
	University of Texas Southwestern Medical Center Dallas	–	100		–	93
	Phoenix Children's Hospital	–	20		–	29
	Gender (% male)	13.2	14.2	0.700	14.2	20.2	0.027
	Race (% Caucasian)	84.0	85.7	0.551	87.0	86.0	0.685
	Ethnicity (% non-Hispanic)	98.0	94.0	0.014	97.2	94.5	0.072
	Age (years, mean)	41.1	40.4	0.128	45.4	45.0	0.260
	Annual household Income (% ≤$50,000)	20.9	25.7	0.153	22.3	26.2	0.230
	Hollingshead SES score (mean)	45.6	46.5	0.404	46.2	45.5	0.474

A P value<0.008 was determined to be statistically significant

SES socioeconomic status