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  • Title: Urine albumin/creatinine ratio for the assessment of albuminuria in pregnancy hypertension.
    Author: Nisell H, Trygg M, Bäck R.
    Journal: Acta Obstet Gynecol Scand; 2006; 85(11):1327-30. PubMed ID: 17091412.
    Abstract:
    BACKGROUND: An accurate method to assess albuminuria in pregnancy is mandatory to diagnose pre-eclampsia. Twenty-four-hour urine collection is still the only universally accepted method. This is, however, a cumbersome and inconvenient method. Therefore, the present study aimed at assessing the accuracy of a spot urine albumin/creatinine ratio in pregnant women with hypertension. MATERIAL AND METHODS: In 54 pregnant women with blood pressure >or=140/90 mmHg, 24-h albumin excretion and subsequent albumin/creatinine ratio on morning spot urine were analyzed in the individual patients. Altogether 75 paired samples were included. Receiver operating characteristic curves, relating different albumin/creatinine ratio cut-off values to 24-h albumin excretion >300 mg were constructed. Correlations were assessed by Spearman rank correlation tests. RESULTS: The area under the receiver operating characteristic curve was 0.985. At the optimal cut-off albumin/creatinine ratio value of 27 mg/mmol the sensitivity, specificity, positive and negative predictive value for detecting albuminuria >300 mg/24 h were: 95, 100, 100 and 86% respectively. There was a close correlation between albumin/creatinine ratio and 24-h albumin excretion values (r=0.95; p<0.001). CONCLUSIONS: It is suggested that in most cases the more cumbersome 24-h urine collection can be replaced by the more convenient albumin/creatinine ratio on spot urine.
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