Table 2.
Prevalence of selective IgA deficiency in different populations from lowest to highest according to previous screening studies.
| n* | Prevalence | Target population | Reference | |
|---|---|---|---|---|
| Canada | 4898 | 1:134 | Adults, children | 5 |
| Spain | 1856 | 1:163 | Children 2–16 years | 32 |
| Sweden | 2423 | 1:173 | Children 4 years | 7 |
| Turkey | 20331 | 1:188 | Children | 33 |
| Finland | 5000 | 1:192 | Children 2–16 years | 34 |
| Nigeria | 3772 | 1:251 | Children | 35 |
| Czech Republic | 5310 | 1:409 | Blood donors | 36 |
| Australia | 6191 | 1:442 | Blood donors | 37 |
| Estonia | 4152 | 1:461 | Blood donors | 38 |
| Finland | 64588 | 1:500 | Blood donors | 39 |
| Iceland | 15000 | 1:633 | Blood donors | 40 |
| England | 29745 | 1:875 | Blood donors | 41 |
| Brazil | 11576 | 1:965 | Blood donors, pregnant women | 42 |
| Iran | 8852 | 1:983 | Blood donors | 43 |
| China | 33171 | 1:4100 | Adults, children | 44 |
| Japan | 222597 | 1:18500 | Blood donors | 4 |
*
Size of the screened population.