title: [Predictive value of urinary calcium measurement on occurrence of pregnancy-induced hypertension].
abstract: OBJECTIVE
  To study the predictive value of urinary calcium excretion on occurrence of pregnancy-induced hypertension (PIH).
  
  
  METHODS
  Twenty-four-hour urinary calcium excretion, urinary calcium concentration and urinary calcium/creatinine (Ca/Cr) ratio were determined in 184 normal pregnant women and 30 patients with PIH.
  
  
  RESULTS
  Twenty-four-hour urinary calcium excretion, urinary calcium concentration, and Ca/Cr ratio in PIH group were significantly lower than that in normal pregnant group (P < 0.01). 3 mmol/L of urinary calcium concentration and 0.04 of Ca/Cr ratio were chosen as predictive thresholds for development of PIH, with sensitivity of 76.2%, 81.0% and specificity of 97.5%, 98.2% respectively.
  
  
  CONCLUSIONS
  Low urinary calcium excretion is a valuable marker for prediction of PIH.
authors: Affiliated Hospital, Qingdao Medical College.
authors: Y
authors: Y
authors: Ye
authors: S
authors: S
authors: Dai
authors: X
authors: X
authors: Geng
mesh_terms: D000328:Adult; D002118:Calcium / Q000652:urine*; D003404:Creatinine / Q000652:urine; D005260:Female; D006801:Humans; D011225:Pre-Eclampsia / Q000652:urine*; D011247:Pregnancy; D012680:Sensitivity and Specificity
chemical_list: D003404:Creatinine; D002118:Calcium