title: Combining 2nd-trimester maternal serum homocysteine levels and uterine artery Doppler for prediction of preeclampsia and isolated intrauterine growth restriction.
abstract: OBJECTIVE
  To evaluate the efficacy of a combined 2nd-trimester maternal serum homocysteine and uterine artery Doppler screening at 20 weeks of gestation for complications of pregnancy: preeclampsia, isolated intrauterine growth restriction (IUGR), placental abruption, and stillbirths.
  
  
  METHODS
  Consecutive singleton pregnancies without previous risk factors who had homocysteine measured as part of a serum-screening program for trisomy 21 had uterine artery Doppler performed. Sensitivity, specificity, positive and negative predictive values, odds ratio, and positive and negative likelihood ratios for the subsequent development of preeclampsia, isolated IUGR, placental abruption, stillbirth, and preterm delivery were calculated for the following methods (1) homocysteine cut-off level 6.3 micromol/l (95th centile); (2) on Doppler ultrasound bilateral notches with a mean resistance index (RI) >0.55 (50th centile), all unilateral notches with a mean RI >0.65 (80th centile), and absence of notches with a mean RI >0.7 (95th centile), and (3) Doppler ultrasound notch evaluation (bilateral, unilateral, absence as in method 2) combined with the homocysteine cut-off level of 6.3 micromol/l.
  
  
  RESULTS
  By using a logistic regression model, methods 1 and 2 predicted preeclampsia (p < 0.001), isolated IUGR (p < 0.01), and "any complication" (p < 0.01). The sensitivity for prediction of preeclampsia using the combined method (3) was 61.3% for a false-positive rate of 2%, better than that for isolated IUGR (54%) below the 5th centile and "any complication" (56%).
  
  
  CONCLUSIONS
  This prospective study confirms the potential of a combined method of elevated homocysteine and uterine artery Doppler screening for preeclampsia, isolated IUGR, and any obstetric complication.
authors.affiliation: Centrum Clinic, Nenehatun, No. 59 GOP, TR-06700 Ankara, Turkey. gogsenonalan@yahoo.com
authors.forename: Reside
authors.initials: R
authors.lastname: Onalan
authors.forename: Gogsen
authors.initials: G
authors.lastname: Onalan
authors.forename: Ziya
authors.initials: Z
authors.lastname: Gunenc
authors.forename: Erdem
authors.initials: E
authors.lastname: Karabulut
mesh_terms: D000037:Abruptio Placentae / Q000097:blood / Q000175:diagnosis / Q000209:etiology; D000328:Adult; D001158:Arteries / Q000000981:diagnostic imaging / Q000378:metabolism; D015415:Biomarkers / Q000097:blood; D005260:Female; D005317:Fetal Growth Retardation / Q000097:blood / Q000175:diagnosis* / Q000209:etiology; D006710:Homocysteine / Q000097:blood*; D006801:Humans; D020138:Hyperhomocysteinemia / Q000097:blood / Q000150:complications / Q000175:diagnosis; D016015:Logistic Models; D008403:Mass Screening / Q000379:methods*; D011225:Pre-Eclampsia / Q000097:blood / Q000175:diagnosis* / Q000209:etiology; D011237:Predictive Value of Tests; D011247:Pregnancy; D011256:Pregnancy Outcome; D011262:Pregnancy Trimester, Second; D011446:Prospective Studies; D012680:Sensitivity and Specificity; D050497:Stillbirth; D018608:Ultrasonography, Doppler; D014599:Uterus / Q000098:blood supply*
chemical_list: D015415:Biomarkers; D006710:Homocysteine