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Number of children in the study by country/region of origin and sex.
| Country/Region of origin | Sex | Number | Total by region |
|---|---|---|---|
| Qatar | Male | 93 | |
| Female | 75 | 168 | |
| Middle East | Male | 51 | |
| Female | 41 | 92 | |
| Africa | Male | 72 | |
| Female | 47 | 119 | |
| Asia | Male | 93 | |
| Female | 85 | 178 | |
| Other* | Male | 13 | |
| Female | 10 | 23 |
This category included subjects from Europe, North and South America.
