Table 1.

Sample demographics.

Variable		PFa, n	IFb, n	χ2	Total, N=49	dfc	P
Sex				.004	49	1	.947
	Male	7	6
	Female	19	17
Race				0.3	42	1	.607
	Caucasian	19	20
	African American	1	2
	Not reported	6	1
Ethnicity				0.9	42	1	.335
	Hispanic or Latino	0	1
	Not Hispanic or Latino	20	21
	Not reported	6	1
Education				2.4	42	1	.448
	<High school graduate	1	0
	High school graduate	0	1
	College or vocational school degree	8	11
	Graduate level degree	11	10
	Not reported	6	1
Income				3.9	42	6	.701
	< US $40,000 per year	4	4
	> US $40,000 per year	9	14
	Prefer not to answer	7	4
	Not reported	6	1

^aPF=Paper-first group

^bIF=iPad-first group

^cdf=degrees of freedom