Table 1:

Characteristics of study participants who were assigned to paper diary and text messages or smartphone app (N=25, includes 4 participants who submitted paper diaries only and 4 who submitted app data only)

	Paper (n=21)	Text (n=7)	App (n=14)
Age in years
Mean	30	31	28
Range	25–42	35–35	21–36
Missing	4	0	1
Race/ethnicity	N (%)	N (%)	N (%)
White	16 (76.2)	7 (100.0)	9 (64.3)
Asian/Pacific Islander	3 (14.3)	0 (0.0)	5 (35.7)
Other	2 (9.5)	0 (0.0)	0 (0.0)
Education	N (%)	N (%)	N (%)
High school or less	1 (4.8)	1 (14.3)	0 (0.0)
Some college	5 (23.8)	2 (28.6)	4 (28.5)
Bachelor’s degree or higher	15 (71.4)	4 (57.1)	10 (71.4)
Employed	N (%)	N (%)	N (%)
Yes	18 (85.7)	7 (100.0)	10 (71.4)
Marital status	N (%)	N (%)	N (%)
Single/divorced	8 (38.1)	3 (42.9)	5 (35.7)
Married/remarried	4 (19.0)	0 (0.0)	4 (28.6)
Other	9 (42.9)	4 (57.1)	5 (35.7)
Household income (annual)	N (%)	N (%)	N (%)
< $10,000	1 (4.8)	0 (0.0)	2 (14.3)
$10,000-$39,999	11 (52.4)	4 (57.1)	7 (50.0)
$40,000–74,999	8 (38.1)	3 (42.9)	3 (21.4)
Over $75,000	1 (4.8)	0 (0.0)	2 (14.3)
Parity	N (%)	N (%)	N (%)
Nulliparous	13 (61.9)	3 (42.9)	10 (71.4)
1+	8 (38.1)	4 (57.1)	4 (28.6)