Table 1: Characteristics of participants at baseline.

Characteristics of each of the groups, based on enrollment status and group assignment. N = count SD = standard deviation N/A = not applicable. * (all participants selecting other wrote in a form of private insurance).

	Control (N=27)		Intervention (N=28)		Enrolled, Not Randomized (N=49)
	Mean	SD	Mean	SD	Mean	SD
Age (years)	50	12	49	13	48	13
	N	percent	N	percent	N	percent
Female	9	33%	15	54%	30	61%
Hispanic	2	7%	0	0%	3	6%
Race
Asian	0	0%	0	0%	1	2%
Black / African American	5	19%	7	25%	12	24%
White	21	78%	20	71%	32	65%
Other, N/A or not disclosed	0	0%	1	4%	5	10%
Desired text frequency
Once every other day	16	59%	12	43%	27	55%
Once per day	9	33%	14	50%	18	37%
Twice per day	2	7%	2	7%	4	8%
Health Insurance (multiple types could be selected)
Private	17	63%	19	68%	22	45%
Medicaid	2	7%	3	11%	11	22%
Medicare	4	15%	3	11%	9	18%
Uninsured	0	0%	0	0%	2	4%
Other (all wrote in a form of private insurance)	7	26%	6	21%	13	27%
Routine place for primary medical care	22	81%	28	100%	44	90%
Previous diagnosis of hypertension	20	74%	21	75%	35	71%
Prior hospitalization for hypertension	4	15%	2	7%	6	12%
Prior medication for hypertension	13	48%	17	61%	26	53%
Current number of hypertension medications taking
0	18	67%	12	43%	25	51%
1	4	15%	10	36%	14	29%
2	1	4%	6	21%	4	8%
3	1	4%	0	0%	3	6%
4	1	4%	0	0%	2	4%
5	2	7%	0	0%	0	0%
Smoke cigarettes	6	22%	7	25%	3	6%
Most commonly used communication method
In person conversations	5	19%	6	21%	16	33%
Internet/social media	1	4%	2	7%	3	6%
Other	1	4%	0	0%	1	2%
Phone calls	13	48%	10	36%	18	37%
Text messages	7	26%	10	36%	11	22%