Fig. 1
From: Trends in smoking during pregnancy by socioeconomic characteristics in the United States, 2010–2017
Trend of the prevalence of smoking during pregnancy by race, 2010–2017. Cochran–Armitage tests were used to assess the statistical significance of changes in the trend of the prevalence of smoking during pregnancy stratified by race (p < 0.001 for all race subgroups). Logistic regression results show the odds of smoking during pregnancy and whether the trend differed significantly between races (p < 0.0001)