Coverage of urinary iodine surveys
Population coverage (school-age children, 6-12 years) by urinary iodine surveys carried out between 1993-2003, by WHO region. Number of countries with national, and if not available, sub-national urinary iodine surveys.
Table adapted from the following document:
de Benoist B et al., eds. Iodine status worldwide. WHO Global Database on Iodine Deficiency
Geneva, World Health Organization, 2004
| WHO Regiona | Total number of school-age children (in millions)b | School-age children covered (in millions) | Coverage (%) | Number of countriesa with | ||
| National surveys | Sub-national surveys | No Data | ||||
| Africa | 128.9 | 116.9 | 90.7 | 17 | 17 | 12 |
| Americas | 109 | 98.8 | 90.6 | 13 | 7 | 15 |
| South East Asia | 242.4 | 239.4 | 98.8 | 7 | 2 | 2 |
| Europe | 81.2 | 70.5 | 86.8 | 21 | 17 | 14 |
| Eastern Mediterranean | 87.1 | 72.6 | 83.4 | 11 | 4 | 6 |
| Western Pacific | 199.4 | 183 | 91.8 | 6 | 4 | 17 |
| Total | 848 | 781.2 | 92.1 | 75 | 51 | 66 |
a 192 WHO Members States
b Based on population estimates for the year 2002 (United Nations, Population Division, World Population Prospects: The 2002 Revision)