Extended Data Fig. 2: Overview of birth data from DHS surveys and study regions in Africa.
From: Robust relationship between air quality and infant mortality in Africa
a, Location of DHS clusters included in our sample. b, The number of births observed in each year in our sample. More births are observed in earlier years because births are recalled in the surveys so each new survey round potentially adds births from all previous years. c, Regional categorization of countries, for regional analysis in Fig. 2c. Sample countries assigned to West Africa region are Benin, Burkina Faso, Ivory Coast, Ghana, Guinea, Liberia, Mali, Nigeria, Senegal, Sierra Leone and Togo. Sample countries assigned to ‘rest of Africa’ are Angola, Burundi, Cameroon, Comoros, DRC, Ethiopia, Gabon, Kenya, Lesotho, Madagascar, Malawi, Mozambique, Namibia, Rwanda, Swaziland, Uganda, Zambia and Zimbabwe. Country outlines were obtained from Global Administrative Areas, version 2.030.
