Summary of SNP datasets from nine sJIA case–control collections after quality control operations
| Stratum | Cases | Controls | Genotyped SNPs (filtered) | Imputed | Imputed SNPs (filtered) |
|---|---|---|---|---|---|
| USA | 243 | 1718 | 476 196 | 18 263 974 | 6 189 397 |
| UK | 202 | 4097 | 440 688 | 18 263 701 | 6 255 387 |
| Germany | 115 | 193 | 682 516 | 18 266 121 | 6 391 432 |
| Turkey | 49 | 94 | 682 598 | 18 270 612 | 6 389 103 |
| Italy | 49 | 59 | 686 397 | 18 269 173 | 6 375 260 |
| Brazil | 48 | 62 | 740 509 | 18 263 563 | 6 698 947 |
| Argentina | 33 | 115 | 659 100 | 18 263 401 | 6 129 601 |
| Canada | 17 | 427 | 396 935 | 18 263 146 | 5 812 530 |
| Spain | 14 | 182 | 156 136 | 18 261 199 | 4 147 550 |
| Total | 770 | 6947 |
sJIA, systemic juvenile idiopathic arthritis; SNP, single nucleotide polymorphism.