Table 1.

Factors, variables, measures, and time data collected.

Factors and variables		Measures	Time data collected
Individual characteristics
	Age	Years	Baseline
	Sex	Male and female	Baseline
	BMI	Weight and height	Baseline and 8 weeks
Physiological factors
	Metabolite profile	24-hour urinary sample	Baseline and 8 weeks
	Salt sensitivity gene	Single-nucleotide polymorphism genotyping	Baseline
Feasibility measures
	Retention rate	Number of subjects that came to the follow-up visit	Over 8 weeks
	Attendance at education sessions	Number of education sessions attended on the internet	Over 8 weeks
	Adherence to dietary sodium intake monitoring	Logging a meal in the app/manual	Over 8 weeks
	Adherence to in-home blood pressure monitoring	Logging BP using BP monitor device	Over 8 weeks
Outcomes
	Blood pressure	WelchAllyn Vital Signs Monitor	Baseline and 8 weeks
	Sodium intake	24-hour urinary sodium excretion	Baseline and 8 weeks