2.4 STUDY VARIABLES
The main outcome variable was GBS colonization, defined as positive sample culture from the lower vagina duct. Potential interfering factors were chosen a priori on the basis of literature review, including age (years), marrietal status (single, married, widow), level of education (Primary, secondary and high education), income ( low, moderate and hight) occupation ( Student, housewife,femer, business, nurse, teacher,hustle, other), gestationnal age (in weeks), parity (number of previous births), induce abortion (yes or no), spontaneaous abortions (yes, no), stillborn (yes, no), previous surgy (yes, no),electropic pregnancy (yes, no), induce labour (yes, no), PROM (yes, no), Number of prenatal visit, used of contraceptive (yes, no), Used of antibiotic (yes, no), fever (yes, no), diabetic (yes, no), HIV status (yes, no), heart disease (yes, no), anemia (yes, no) and UTI during pregnancy (yes, no)