Table 2.

Patient demographics by site—Boston Medical Center (BMC) and Boston Children’s Hospital (BCH; N=45).

Patients		BCH (n=20)	BMC (n=25)	Total	P value
Age (years)						.84
	Mean (SD)	20.21 (2.5)	20.04 (2.9)	20.11 (2.7)
	Median (range)	20 (16-26)	20 (14-25)	20 (14-26)
Ethnicity and race, n (%)						.32
	Hispanic and Latino	2 (10)	6 (24)	8 (18)
	Non-Hispanic White	3 (15)	1 (4)	4 (9)
	Non-Hispanic Black	9 (45)	15 (60)	24 (53)
	Non-Hispanic other (including American Indian or Alaska Native, Asian and Pacific Islander, or more than one)	4 (20)	2 (8)	6 (13)
	Unknown	2 (10)	1 (4)	3 (7)
Sex, n (%)						.64
	Female	11 (55)	12 (48)	23 (51)
	Male	9 (45)	13 (52)	22 (49)
Education—highest level, n (%)						.04
	High school graduate or less	7 (35)	17 (68)	24 (53)
	Some college credit or more	12 (60)	8 (32)	20 (44)
	N/Aa (missing)	1 (5)	0 (0)	1 (2)
Income (US $), n (%)						.13
	<20,000	5 (25)	13 (52)	18 (40)
	20,000-49,999	6 (30)	7 (28)	13 (29)
	≥50,000	5 (25)	2 (8)	7 (16)
	N/A (missing)	4 (20)	3 (12)	7 (16)
Time in years since positive HIV diagnosis, n (%)						.91
	1-3	4 (20)	6 (24)	10 (22)
	3-5	1 (5)	5 (20)	6 (13)
	>5	15 (75)	14 (56)	29 (64)
Smartphone ownership, n (%)						.06
	iPhone	20 (100)	20 (80)	40 (89)
	Android	0 (0)	5 (20)	5 (11)
Hours spent on phone per day, n (%)						.46
	0-3	4 (20)	4 (16)	8 (18)
	4-6	10 (50)	9 (36)	19 (42)
	>7	6 (30)	12 (48)	18 (40)
Health or HIV apps, n (%)						.73
	Yes	4 (20)	7 (28)	11 (24)
	No	15 (75)	17 (68)	32 (71)
	N/A (missing)	1 (5)	1 (4)	2 (4)
Tech savvy						.15
	Personal score, mean (SD)	8.3 (1.63)	7.6 (1.50)	7.9 (1.58)
	N/A (missing), n (%)	0 (0)	1 (4)	1 (2)

^aN/A: not applicable.