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. 2019 May 9;19:162. doi: 10.1186/s12884-019-2300-0

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© The Author(s). 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 2 — Map of explanatory variables in 251 districts (hospital obstetricians and hospital beds are based on the 56 hospital service areas). The figures were obtained using the data for the year 2013, except for the deprivation index which was based on the 2010 census