title: The angiotensin sensitivity test and low-dose aspirin are ineffective methods to predict and prevent hypertensive disorders in nulliparous pregnancy.
abstract: OBJECTIVE
  Our purpose was to assess the efficiency of the angiotensin sensitivity test as a predictive test for preeclampsia and the effectiveness of low-dose aspirin to prevent preeclampsia when commenced at 28 weeks' gestation in angiotensin II-sensitive women.
  
  
  METHODS
  A total of 495 healthy nulliparous women underwent the angiotensin sensitivity test at 28 weeks' gestation. The angiotensin II-sensitive women were randomized to 60 mg of aspirin or placebo as a subset of a large multicenter, randomized, controlled trial of low-dose aspirin therapy in pregnancy. Assessment of the efficiency of the angiotensin sensitivity test and low-dose aspirin in pregnancy was performed after detailed review of case notes after delivery. The Oxford definition of preeclampsia was used. This includes women without proteinuria but requires blood pressure increments that have been validated to bias the selection to primigravid women.
  
  
  RESULTS
  Five women had proteinuric preeclampsia in the angiotensin II-sensitive group randomized to aspirin compared with none in the group randomized to placebo. Overall, 11 (25%) of the women randomized to aspirin had preeclampsia compared with four (11%) randomized to placebo (p < 0.05, not significant). The positive and negative predictive values for the angiotensin sensitivity test were 19% and 87%, respectively.
  
  
  CONCLUSIONS
  The angiotensin sensitivity test is not an effective screening test for preeclampsia, and low-dose aspirin does not prevent preeclampsia when commenced at 28 weeks' gestation in angiotensin II-sensitive women.
authors.affiliation: Department of Obstetrics and Gynaecology, John Radcliffe Hospital, Oxford, United Kingdom.
authors.forename: P M
authors.initials: PM
authors.lastname: Kyle
authors.forename: D
authors.initials: D
authors.lastname: Buckley
authors.forename: J
authors.initials: J
authors.lastname: Kissane
authors.forename: M
authors.initials: M
authors.lastname: de Swiet
authors.forename: C W
authors.initials: CW
authors.lastname: Redman
mesh_terms: D000804:Angiotensin II; D001241:Aspirin / Q000008:administration & dosage / Q000627:therapeutic use*; D001794:Blood Pressure; D005260:Female; D005865:Gestational Age; D006801:Humans; D008403:Mass Screening / Q000379:methods / Q000706:statistics & numerical data; D010298:Parity; D010919:Placebos; D011225:Pre-Eclampsia / Q000175:diagnosis* / Q000503:physiopathology / Q000517:prevention & control*; D011247:Pregnancy
chemical_list: D010919:Placebos; D000804:Angiotensin II; D001241:Aspirin