Correction to paper published in Human Reproduction: ‘Serum inhibin A and activin A are elevated prior to the onset of pre eclampsia’

, 2000). We have recently discoveredthat the web-based calculator (http://cebm.jr2.ox.ac.uk/docs/2 2table.html) uses an incorrect formula to calculate confi-dence intervals for sensitivity. We present revised Tables IIIand IV below. Confidence intervals were recalculated usingthe software Confidence Interval Analysis (2000). Thisresulted in the same point estimates, but wider confidenceintervals and minor alterations to post-test probabilities.We would like to thank Ed Juszczak (Centre for StatisticalMedicine, Institute of Health Sciences, Oxford, UK) for hisadvice and help in reanalysing the data.