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Objective  1) To assess the correlation between urine albumin/creatinine ratio (ACR) and 24‐hour urine albumin excretion in women with pre‐eclampsia, 2) to study the influence of potential confounders on this correlation and 3) to assess the variability of ACR between voids during a 24‐hour period.

Design  Prospective study.

Setting  Fetal maternity ward, university hospital.

Population  Women with pre‐eclampsia scheduled for quantitative albumin measurement with a 24‐hour urine collection.

Methods  Random urine samples were obtained for analysis of ACRs during the time of 24‐hour urine collections in 31 women. ACRs were also measured from the complete 24‐hour collections. In five additional women, serial urine samples were obtained during the 24‐hour collection.

Main outcome measures  Correlation between ACRs and albumin amount in 24‐hour urine samples. Variability of the ACRs during …