Table 3.
Data on serum 25(OH)D levels in infants, adults, and pregnant or lactating women in selected countries on the basis of a systematic review of published studies57
| Country | Survey year(s) | N | <30 nmol/L | <50 nmol/L |
|---|---|---|---|---|
| United States | ||||
| Infants229 | 1997–2001 | 400 | — | 46% (black), 10% (white) (<37.5 nmol/L) |
| Adults230 | 2001–2006 | 23,424a | 6% | 34–37% |
| Pregnant/lactating women231 | 2001–2006 | 928 | — | 33% |
| India | ||||
| Infants232 | 2006–2007 | 342 | 61% | 99% |
| Adults233 | 2010 | 441 | — | 66% |
| Pregnant/lactating women232 | 2006–2007 | 541 | 60% | 96% |
| Iran | ||||
| Infants59 | 2002 | 258 | 86% | 93% (< 35 nmol/L) |
| Adults234 | 2010 | 1111 | — | 51% |
| Pregnant/lactating women59 | 2002 | 552 | — | 67% (< 35 nmol/L) |
| Turkey | ||||
| Infants58 | 2008 | 258 | 51% | 90% |
| Adults | — | — | — | — |
| Pregnant/lactating women58 | 2008 | 258 | 50% | 90% |
a
Indicates data are nationally or regionally representative.