Table 8.

Description of various research factors and quantitative methods.

Variables	Study factors	Code	Unit of quantification
Dependent variable	Prevalence of hypothyroidism	Y	0= no hypothyroidism 1= hypothyroidism
Independent variable	Degree of education	X1	0= never attended school 1= primary and junior high school
	Smoking status	X2	2= high school/technical school/technical secondary school
	Alcohol Consumption status	X3	3= college/university degree or above
	Salt intake habits	X4	0= smoking 1= no smoking
	Eating seafood habits	X5	0= alcohol consumption 1= no alcohol consumption
	Annual household income	X7	0= mild 1= moderate 2= severe