title: Risk Factors for premature birth in a hospital.
abstract: OBJECTIVE
  to determine the risk factors for premature birth.
  
  
  METHODS
  retrospective case-control study of 600 pregnant women assisted in a hospital, with 298 pregnant women in the case group (who gave birth prematurely <37 weeks) and 302 pregnant women who gave birth to a full-term newborn in the control group. Stata software version 12.2 was used. The Chi-square test was used in bivariate analysis and logistic regression was used in multivariate analysis, from which Odds Ratios (OR) and Confidence Intervals (CI) of 95% were derived.
  
  
  RESULTS
  risk factors associated with premature birth were current twin pregnancy (adjusted OR= 2.4; p= 0.02), inadequate prenatal care (< 6 controls) (adjusted OR= 3.2; p <0.001), absent prenatal care (adjusted OR= 3.0; p <0.001), history of premature birth (adjusted OR= 3.7; p <0.001) and preeclampsia (adjusted OR= 1.9; p= 0.005).
  
  
  CONCLUSIONS
  history of premature birth, preeclampsia, not receiving prenatal care and receiving inadequate prenatal care were risk factors for premature birth.
authors.affiliation: Facultad de Ciencias de la Salud, Universidad Católica Sedes Sapientiae, Lima, Peru.
authors.forename: Margarita E
authors.initials: ME
authors.lastname: Ahumada-Barrios
authors.affiliation: Facultad de Ciencias de la Salud, Universidad Católica Sedes Sapientiae, Lima, Peru.
authors.forename: German F
authors.initials: GF
authors.lastname: Alvarado
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D005260:Female; D006761:Hospitals; D006801:Humans; D007231:Infant, Newborn; D011247:Pregnancy; D047928:Premature Birth / Q000453:epidemiology*; D012189:Retrospective Studies; D018570:Risk Assessment; D012307:Risk Factors