Following the publication of the report and in response to the feedback received, the NMPA is now undertaking further analysis to determine the nature and extent of the impact that missing data may have had on some of the published results. The aim of this analysis is to determine whether changes in how we handle missing data are required.
An initial summary of the findings of this review can be found here. The review has found that, for approximately one quarter of participating maternity services, missing data on fetal presentation have affected the rates reported for mode of birth, post-partum haemorrhage, induction of labour and vaginal birth after caesarean section. In one site, missing data on gestational age have had a similar effect. The participating sites that have been most affected by this issue have been contacted. Our preliminary analysis suggests that the other measures are not affected, although our review will continue to examine all of the published results.
Once this work is completed, a revised report will be published on our website and will be communicated with you. We anticipate that this will be in early 2018. In the meantime, the NMPA website has been updated to reflect the fact that some of the results will change.
Thank you for continuing to support the NMPA as we address this issue. The second round of data collection is now taking place using the same approach as the first report. Please be assured that our methodology will be updated to avoid the same situation arising again. You can also help us by continuing your efforts locally to ensure that data submitted to the NMPA is as complete as possible.
We would like to apologise for any inconvenience you may have experienced as a result of this issue and would greatly welcome your feedback. Please do not hesitate to contact us should you have any concerns about this, or any other aspect of the NMPA.