Figure 1.

OR of ever heated tobacco product (HTP) smokers with hypertensive disorders of pregnancy and low birth weight, compared with never HTP smokers. Age was adjusted in model 1, and other covariates (combustible cigarette smoking, educational attainment, occupation, household income and comorbidity) were additionally adjusted in model 2. The samples for each analysis in model 2 were as follows: n=494 (overall), n=370 (never combustible cigarette smokers), and n=124 (ever combustible cigarette smokers) for hypertensive disorders of pregnancy; and n=478 (overall), n=310 (never combustible cigarette smokers) and n=118 (ever combustible cigarette smokers) for low birth weight.