0 = female
1 = male

gender
1 = male
2 = female

education level (4 categories)
1 = primary
2 = secondary
3 = diploma
4 = bachelor or higher

primary education only
0 = secondary or higher
1 = primary education only

on prescription for anti-hypertensive medications
0 = no
1 = yes

smoking category (3 categories)
1 = never
2 = former
3 = current

never or former smoker
0 = current
1 = never/former

current or former smoker
0 = never
1 = current/former

alcohol category (3 categories)
1 = less than one
2 = 1-14
3 = >14

non or moderate drinker
0 = high level consumption
1 = non or moderate

regular drinker
0 = never
1 = regular drinker

ipaq categories (3 categories)
1 = low
2 = moderate
3 = high

moderate or high physical activity
0 = low
1 = moderate or high physical activity

low level physical activity
0 = moderate or high
1 = low level physical activity

high diet quality (DASH upper 40%)
0 = bottom 60%
1 = top 40th percentile DASH score

high body mass index (>= 25kg/m2)
0 = normal
1 = high