Table 1.
Sample size (countries) and year of data used for analysis for all outcomes and distribution of income level of countries by outcome
| Years used to assess current relationship | Years used to assess relationship over time | Income level of countries included in analysis for current relationship [%(n)] | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Numbera | Educational attainment | Outcome and GNI per capita | Numberb | Educational attainment | Outcome and GNI per capita | Low | Lower middle | Upper middle | High | |
| Outcome | ||||||||||
| Anemia among < 5 y | 141 | 2010 | 2012 | 659 | 1985–2005 | 1990–2010 | 16.3 (23) | 24.1 (34) | 23.4 (33) | 36.2 (51) |
| Anemia among non-pregnant women | 141 | 2010 | 2012 | 659 | 1985–2005 | 1990–2010 | 16.3 (23) | 24.1 (34) | 23.4 (33) | 36.2 (51) |
| VAD among < 5 y | 93 | 2010 | 2013 | 365 | 1990–2005 | 1995–2010 | 23.7 (22) | 32.2 (30) | 34.4 (32) | 9.7 (9) |
| Zinc deficiency in the population | 139 | 2000 | 2005 | 515 | 1985–2000 | 1990–2005 | 25.2 (35) | 25.9 (36) | 20.1 (28) | 28.8 (40) |
| Median UIE of the population | 127 | 2010 | 2012 | – | – | – | 17.3 (22) | 26.0 (33) | 22.8 (29) | 33.9 (43) |
| Infants protected from iodine deficiency | 94 | 2010 | 2012 | – | – | – | 23.4 (22) | 36.2 (34) | 34.0 (32) | 6.4 (6) |
a Number of countries
b Number of country time points over the observation periods
GNI gross national income, VAD vitamin A deficiency, UIE urinary iodine excretion, y years