Table 3.

Association between blood lead level and hypertension.

	Odds ratio for every doubling in blood lead level [95% Confidence Interval]
Crude	1.45 [1.40–1.50]
Model 1	0.98 [0.95–1.02]
Model 2	1.10 [1.06–1.14]
Model 3	1.07 [1.02–1.13]
Model 4	1.09 [1.04–1.14]

Figures are expressed as odds ratio [95% confidence interval].

Model 1: adjusted for age, gender and ethnicity.

Model 2: adjusted for age, gender, ethnicity and waist circumference.

Model 3: adjusted for age, gender, ethnicity, waist circumference, poverty to income ratio, education and ever cigarette smoking.

Model 4: adjusted for age, gender, ethnicity, waist circumference, poverty to income ratio, education, ever cigarette smoking, diabetes and stage 3–5 chronic kidney diseases.