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Figure 1. Screening for Bacterial Vaginosis: Analytic Framework

The analytic framework begins with a population of pregnant women asymptomatic for BV who are at average risk (the general population of pregnant women) or high risk for preterm delivery. Women were considered to be at high risk for preterm delivery if they had a previous preterm delivery. Asymptomatic patients were defined as those who presented for routine prenatal visits and not for evaluation specifically of vaginal discharge, odor, or itching. Under this definition, asymptomatic could include both patients who were without symptoms and those who were unaware of symptoms. This population was felt to be most reflective of that encountered in everyday practice.

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