Table 1. Sample size and SNPs available for analysis following quality control procedures.
| Ancestry |
Cases |
Controls |
Platform | SNPs | Source | ||||
|---|---|---|---|---|---|---|---|---|---|
| N | Age (s.d.) | Male/female | N | Age (s.d.) | Male/female | ||||
| European-American | |||||||||
| Discovery | 972 | 43.71 (11.29) | 681/291 | 1248 | 50.61 (17.05) | 570/678 | Affymetrix 6.0 | 691 822 | GAIN |
| Replication | 879 | 42.26 (11.93) | 609/270 | 1132 | 49.91 (15.77) | 569/563 | Affymetrix 6.0 | 691 822 | Non-GAIN |
| Han Chinese | |||||||||
| Discovery | 1125 | 35.97 (7.82) | 555/570 | 1034 | 36.60 (10.35) | 476/558 | Illumina Zhonghua 8 | 800 509 | CSCG |
| Replication | 454 | 36.48 (7.98) | 262/192 | 411 | 36.40 (8.16) | 187/224 | Illumina Zhonghua 8 | 800 509 | CSCG |
| African-American | 896 | 43.30 (10.12) | 558/338 | 906 | 45.16 (13.03) | 344/562 | Affymetrix 6.0 | 818 941 | GAIN |
Abbreviations: CSCG, Chinese Schizophrenia Collaboration Group; GAIN, Genetic Association Information Network; SNPs, single-nucleotide polymorphisms.