To aid in cause-of-death and burden-of-disease analyses, the 192 Member States of the World Health Organization have been divided into five mortality strata on the basis of their levels of mortality in children under five years of age (5q0) and in males 15-59 years old (45q15). This classification was carried out using population estimates for 1999 (using United Nations Population Division data) and estimates of 5q0 and 45q15 based on WHO analyses of mortality rates for 1999.
Quintiles of the distribution of child mortality for both sexes combined (5q0) were used to define some countries as very low child mortality (1st quintile), some as low child mortality (2nd and 3rd quintiles) and others as high child mortality (4th and 5th quintiles). Adult mortality (the risk of death between ages 15 and 60 years, i.e. 45q15) was regressed on 5q0 and the regression line used to divide countries with high child mortality into high adult mortality (stratum D) and very high adult mortality (stratum E). Stratum E includes the countries in sub-Saharan Africa where HIV/AIDS has had a very substantial impact.
The adjacent table summarizes the five mortality strata. When these mortality strata are applied to the six WHO regions, they produce 14 subregions, which are used in the Annex Tables to present results. The WHO Member States in each region are grouped by subregion as listed opposite. This classification has no official status and is for analytical purposes only.
The total number of WHO Member States is 192, the latest addition being Timor-Leste, which is classified in the high-mortality developing region of Sear-D. In 2003, the Fifty-sixth World Health Assembly endorsed the reassignment of Cyprus to the European Region from the Eastern Mediterranean Region.
Definitions of morality strata used to define subregions Mortality stratum Child mortality Adult mortality A Very low Very low B Low Low C Low High D High High E High Very high WHO Member States, by region and mortality stratum Region and mortality stratum Description Broad grouping Africa Afr-D Africa with high child and High-mortality high adult mortality developing Afr-E Africa with high child and High-mortality very high adult mortality developing Americas Amr-A Americas with very Developed low child and very low adult mortality Amr-B Americas with low child Low-mortality and low adult mortality developing Amr-D Americas with high High-mortality child and high developing adult mortality South-East Asia Sear-B South-East Asia with Low-mortality low child and low adult developing mortality Sear-D South-East Asia with High-mortality high child and low adult developing mortality Europe Eur-A Europe with very Developed low child and very low adult mortality Eur-B Europe with low child and Developed low adult mortality Eur-C Europe with low child and Developed high adult mortality Eastern Mediterranean Emr-B Eastern Mediterranean Low-mortality with low child and low developing adult mortality Emr-D Eastern Mediterranean High-mortality with high child and developing high adult mortality Western Pacific Wpr-A Western Pacific with Developed very low child and very low adult mortality Wpr-B Western Pacific with Low-mortality low child and low adult developing mortality Region and mortality stratum Member States Africa Afr-D Algeria, Angola, Benin, Burkina Faso, Cameroon, Cape Verde, Chad, Comoros, Equatorial Guinea, Gabon, Gambia, Ghana, Guinea, Guinea-Bissau, Liberia, Madagascar, Mali, Mauritania, Mauritius, Niger, Nigeria, Sao Tome and Principe, Senegal, Seychelles, Sierra Leone, Togo Afr-E Botswana, Burundi, Central African Republic, Congo, Cote d'Ivoire, Democratic Republic of the Congo, Eritrea, Ethiopia, Kenya, Lesotho, Malawi, Mozambique, Namibia, Rwanda, South Africa, Swaziland, Uganda, United Republic of Tanzania, Zambia, Zimbabwe Americas Amr-A Canada, Cuba, United States of America Amr-B Antigua and Barbuda, Argentina, Bahamas, Barbados, Belize, Brazil, Chile, Colombia, Costa Rica, Dominica, Dominican Republic, El Salvador, Grenada, Guyana, Honduras, Jamaica, Mexico, Panama, Paraguay, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Suriname, Trinidad and Tobago, Uruguay, Venezuela (Bolivarian Republic Amr-D Bolivia, Ecuador, Guatemala, Haiti, Nicaragua, Peru South-East Asia Sear-B Indonesia, Sri Lanka, Thailand Sear-D Bangladesh, Bhutan, Democratic People's Republic of Korea, India, Maldives, Myanmar, Nepal, Timor-Leste Europe Eur-A Andorra, Austria, Belgium, Croatia, Cyprus, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Israel, Italy, Luxembourg, Malta, Monaco, Netherlands, Norway, Portugal, San Marino, Slovenia, Spain, Sweden, Switzerland, United Kingdom Eur-B Albania, Armenia, Azerbaijan, Bosnia and Herzegovina, Bulgaria, Georgia, Kyrgyzstan, Poland, Romania, Serbia and Montenegro, Slovakia, Tajikistan, The former Yugoslav Republic of Macedonia, Turkey, Turkmenistan, Uzbekistan Eur-C Belarus, Estonia, Hungary, Kazakhstan, Latvia, Lithuania, Republic of Moldova, Russian Federation, Ukraine Eastern Mediterranean Emr-B Bahrain, Iran (Islamic Republic of), Jordan, Kuwait, Lebanon, Libyan Arab Jamahiriya, Oman, Qatar, Saudi Arabia, Syrian Arab Republic, Tunisia, United Arab Emirates Emr-D Afghanistan, Djibouti, Egypt, (a) Iraq, Morocco, Pakistan, Somalia, Sudan, Yemen Western Pacific Wpr-A Australia, Brunei Darussalam, Japan, New Zealand, Singapore Wpr-B Cambodia, (b) China, Cook Islands, Fiji, Kiribati, Lao People's Democratic Republic, (b) Malaysia, Marshall Islands, Micronesia (Federated States of), Mongolia, Nauru, Niue, Palau, Papua New Guinea, (b) Philippines, Republic of Korea, Samoa, Solomon Islands, Tonga, Tuvalu, Vanuatu, Viet Nam (a) Following improvements in child mortality over recent years, Egypt meets criteria for inclusion in subregion Emr-B with low child and low adult mortality. …