title: Use of a simple clinical tool for airway assessment to predict adverse pregnancy outcomes.
abstract: OBJECTIVE
  Obstructive sleep apnea (OSA) is a risk factor for adverse perinatal outcomes. We aimed to test the hypothesis that maternal Mallampati class (MC), as a marker for OSA, is associated with adverse perinatal outcomes.
  
  
  METHODS
  We performed a retrospective secondary analysis of a prospective cohort of term births (≥ 37 weeks). Fetal anomalies and aneuploidy were excluded. Primary outcome was small for gestational age (SGA). Secondary outcomes included preeclampsia, neonatal cord arterial blood gas pH < 7.10 and < 7.05, base excess <  - 8 and <  - 12 mEq/L. Outcomes were compared between mothers with low MC airways and high MC airways using logistic regression.
  
  
  RESULTS
  A total of 1,823 women met the inclusion criteria. No significant differences were found in the risk of SGA (adjusted odds ratio [aOR] 0.9, 95% confidence interval [CI] 0.6-1.2), preeclampsia (aOR 1.2, 95% CI 0.8-1.9) or neonatal acidemia (aOR 0.8, 95% CI 0.3-2.0), between high and low MC.
  
  
  CONCLUSIONS
  High MC is not associated with adverse perinatal outcomes.
authors: Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, Missouri.
authors: Amanda S
authors: AS
authors: Trudell
authors: Department of Obstetrics and Gynecology, University of South Florida, Tampa, Florida.
authors: Judette M
authors: JM
authors: Louis
authors: Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, Missouri.
authors: Methodius G
authors: MG
authors: Tuuli
authors: Department of Obstetrics and Gynecology, Oregon Health and Sciences University, Portland, Oregon.
authors: Aaron B
authors: AB
authors: Caughey
authors: Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, Missouri.
authors: Anthony O
authors: AO
authors: Odibo
authors: Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, Missouri.
authors: Alison G
authors: AG
authors: Cahill
mesh_terms: D000328:Adult; D001784:Blood Gas Analysis; D015992:Body Mass Index; D005260:Female; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D007236:Infant, Small for Gestational Age; D016015:Logistic Models; D015999:Multivariate Analysis; D016017:Odds Ratio; D017286:Polysomnography; D011225:Pre-Eclampsia / Q000453:epidemiology; D011247:Pregnancy; D011248:Pregnancy Complications / Q000453:epidemiology*; D011256:Pregnancy Outcome; D011379:Prognosis; D011446:Prospective Studies; D012189:Retrospective Studies; D012307:Risk Factors; D020181:Sleep Apnea, Obstructive / Q000145:classification* / Q000453:epidemiology*; D055815:Young Adult