title: Risk factors for a prolonged length of stay in women hospitalized for preeclampsia in Texas.
abstract: OBJECTIVE
  To identify correlates of a prolonged length of stay (PLOS) in women hospitalized for preeclampsia/eclampsia in Texas, USA.
  
  
  METHODS
  Statewide hospital data were obtained, and the records of women who were discharged in 2004 and/or 2005 with a principal discharge diagnosis of preeclampsia or eclampsia were extracted using ICD-9-CM codes. PLOS was defined as a stay greater than 5 days. Odds ratios (OR) for PLOS were calculated. Generalized estimating equations were used to account for a small group of women who were hospitalized multiple times during the study period for preeclampsia. A total of 21,203 records were analyzed.
  
  
  RESULTS
  The crude incidence of PLOS was 17.5%. Advancing maternal age was positively associated with PLOS: for every 10-year increase, there was a 20% increase in the odds of PLOS (adjusted OR = 1.20,95% confidence interval (CI): 1.13, 1.28). The strongest risk factor for PLOS was the presence of renal disease: adjusted OR 5.81 (95% CI: 3.97, 8.50). Protective factors included Medicaid beneficiary status, and being admitted from the emergency department.
  
  
  CONCLUSIONS
  The strongest correlate of PLOS in a large cohort of women hospitalized for preeclampsia was the presence of renal disease.
authors.affiliation: Department of Obstetrics and Gynecology, Texas Tech University Health Sciences Center, El Paso, Texas 79905, USA. zuber.mulla@ttuhsc.edu
authors.forename: Zuber D
authors.initials: ZD
authors.lastname: Mulla
authors.forename: Bahij S
authors.initials: BS
authors.lastname: Nuwayhid
authors.forename: K Michelle
authors.initials: KM
authors.lastname: Garcia
authors.forename: Kellie
authors.initials: K
authors.lastname: Flood-Shaffer
authors.forename: James W
authors.initials: JW
authors.lastname: Van Hook
authors.forename: R Moss
authors.initials: RM
authors.lastname: Hampton
mesh_terms: D015897:Comorbidity; D016001:Confidence Intervals; D004461:Eclampsia / Q000453:epidemiology*; D005260:Female; D006801:Humans; D038801:International Classification of Diseases; D007674:Kidney Diseases / Q000453:epidemiology*; D007902:Length of Stay; D008423:Maternal Age; D008484:Medicaid; D016017:Odds Ratio; D010351:Patient Discharge; D011225:Pre-Eclampsia / Q000453:epidemiology*; D011247:Pregnancy; D018570:Risk Assessment; D012307:Risk Factors; D012720:Severity of Illness Index; D013781:Texas; D014481:United States