Variable

Correlation statistic

r (p-value)

Gender (0 = female, 1 = male)

0.01 (0.4)

Age

0.14 (<0.001) *

Level of education (1 primary or less, 2 higher than primary)

−0.16 (<0.001)

History of hypertension (1 = yes, 0 = no)

0.09 (0.001) *

History of diabetes (1 = yes, 0 = no)

0.12 (<0.001) *

History of sickle cell disease (1 = yes, 0 = no)

0.09 (0.001) *

History of leg swelling (1 = yes, 0 = no)

0.14 (<0.001) *

History of facial swelling (1 = yes, 0 = no)

−0.01 (0.61)

Snuff (1 = yes, 0 = no)

0.08 (<0.01)

Alcohol/week (0 = none, 1 = 1 - 3 drinks, 2 = 4 - 6 drinks, 3 = 7 or more days)

0.04 (0.87)