Bacterial Vaginosis, Educational Level of Pregnant Women, and Preterm Birth: A Case-Control Study

Table 2

Amsel criteria (used at the present study).

Homogeneous vaginal discharge
Amine (fishy) odor when potassium hydroxide solution is added to vaginal secretions
Presence of clue cells (greater than 20%) on microscopy
Vaginal pH > 4.5