title: [Risk factors associated with dystocic delivery].
abstract: BACKGROUND
  the dystocic delivery is a frequent complication and its perinatal repercussions vary from minor lesions to severe brain damage. It has been reported diverse factors associated with this medical complication.
  
  
  OBJECTIVE
  to identify the risk factors with significant association with dystocic delivery.
  
  
  METHODS
  a case-control study was carried out. There were included 750 patients, divided into 250 women with dystocic deliveries (cases) and 500 women with eutocic deliveries (controls). Demographic and clinical variables were registered. The statistical analysis was performed with percentages, arithmetic media, standard deviation, Student t test, chi2 and logistic regression analysis. An alpha value was set at 0.05.
  
  
  RESULTS
  the factors with statistical significance were: advanced age (p < 0.001), major patient's height (p < 0.001), major new born's weight (p = 0.009), lower parity (p < 0.001), and prolonged duration of labor (p = 0.04). Other variables such as number of pregnancies, previous cesarean sections, spontaneous abortions, weight of the patient, weight earned during pregnancy, number of medical appointments during antenatal care, previous dystocic delivery, and premature rupture of the membranes, were not significant.
  
  
  CONCLUSIONS
  there are clinical and demographic risk factors associated with dystocic delivery. To identify this risk factors during the antenatal care could diminish the frequency of dystocic deliveries and therefore to avoid the associated maternal-fetal complications.
authors.affiliation: División de Investigacíon en Salud, Unidad Médica de Alta Especialidad, Hospital de Gineco-Pediatría 48, León, Guanajuato, Instituto Mexicano del Seguro Social. gustavo.romero@imss.gob.mx
authors.forename: Gustavo
authors.initials: G
authors.lastname: Romero Gutiérrez
authors.forename: Juan Carlos
authors.initials: JC
authors.lastname: Ríos López
authors.forename: Patricia
authors.initials: P
authors.lastname: Cortés Salim
authors.forename: Ana Lilia
authors.initials: AL
authors.lastname: Ponce Ponce de León
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D004420:Dystocia / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008800:Mexico; D011247:Pregnancy; D012307:Risk Factors