Table 3: Association between urinary bisphenol A (BPA) and hypertension, by stratification variables.

Stratification categorySample size (cases)Multivariable OR (95% CI)*† comparing BPA tertile 3 versus Tertile 1p-interaction

Race/ethnicity
 Non-Hispanic whites748 (316)1.42 (0.98–2.06)
 Non-Hispanic blacks244 (121)1.91 (0.44–8.33)0.507
 Mexican Americans and others388 (143)1.50 (0.60–3.72)
Smoking status
 Non-smokers691 (265)1.62 (1.01–2.59) 0.932
 Smokers689 (315)1.39 (0.74–2.62)
BMI categories
 Nonobese923 (334)1.37 (0.91–2.06) 0.729
 Obese457 (246)1.84 (0.85–3.99)
Diabetes mellitus/Prediabetes
 Absent896 (282)1.30 (0.87–1.95) 0.494
 Present484 (298)1.91 (1.08–3.37)

*OR (95% CI): Odds Ratio (95% Confidence Interval)
Adjusted for age (years), gender (male, female), race-ethnicity (non-Hispanic whites, non-Hispanic blacks, Mexican Americans, others), education categories (below high school, high school, above high school), smoking (never, former, current), alcohol intake (non-drinker, moderate drinker, heavy drinker), body mass index (normal, overweight, obese), diabetes (present, absent) and total cholesterol (mg/dL).