Helicobacter pylori Exposure in Nausea and Vomiting of Pregnancy Increases Risk of Preterm Delivery

Figure 2

Positive H. pylori test results are associated with risk of vomiting in pregnancy and hyperemesis gravidarum in US populations. A positive H. pylori test result within 5 years preceding pregnancy is more frequently seen in patients with hyperemesis gravidarum or vomiting in pregnancy (odds ratio (OR)1.3-1.4). values represent the number of subjects with pregnancy and H. pylori test results in the University of Washington discovery and large multi-institutional validation cohorts. Results are considered significant if the 95% confidence interval does not include 1 (no risk).