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. 2020 Apr 8;9(2):e000854. doi: 10.1136/bmjoq-2019-000854

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© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

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Box and whisker plots to describe % of mothers in each obstetric unit (OU) with measured (vs estimated) blood loss for different modes of delivery in sequential audit cycles. Median, mean, IQR and range are illustrated. Data for elective caesarean sections in December 2017 are skewed by one elective caesarean section occurring in a single OU in which the blood loss was estimated.