From: Basic vaginal pH, bacterial vaginosis and aerobic vaginitis: prevalence in early pregnancy and risk of spontaneous preterm delivery, a prospective study in a low socioeconomic and multiethnic South American population
% with BV
All clinically eligible patients (N = 1699)
Clinically eligible patients with pH score >=4.5(N = 1199)
White
28.1
40.6
Interracial
24.6
36.1
Black
32.5
44.6
All