Table 3.

Proof-of-concept pilot self-reported demographics (N=16).

Variable		Median (range) or n (%)
Age (years), mean (SD)		24 (18-35)
Race, n (%)
	African-American	11 (69)
	Asian Indian	1 (6)
	Hispanic/Latino	1 (6)
	Caucasian	1 (6)
	Mixed race, other	2 (12)
Income (in US $)
	0-5 k	6 (37)
	5-9999 k	2 (12)
	15-19,999 k	2 (12)
	20-24,999 k	2 (12)
	25-29,999 k	1 (6)
	30-49,999 k	0
	50-69,999 k	0
	70,000 k or more	0
	Respondent did not know	3 (19)
Education, n (%)
	Less than high school	2 (12)
	High school/GED	3 (19)
	Some college	9 (56)
	2-year college degree (associates)	2 (12)
	Bachelor’s degree	0
	Master’s degree	0
	Doctorate or professional degree	0
Previous smartphone ownership, n (%)
	Yes	16 (100)
Previously used a pregnancy app, n (%)
	Yes	13 (81)
	No	3 (19)
Pregnancy planned? n (%)
	Yes	4 (25)
	No	12 (75)
Gestational weeks at enrollment, mean (SD)		24.5 (11-30)
Had a previously very preterm birth? (<32 weeks), n (%)
	Yes	3 (19)
	No	13 (81)