Table 1.
Details of studies included in the pooled dataset
| State | Ages at diagnoses | Years of diagnoses | Years of birth | N cases included |
N controls included |
Matching factors |
|---|---|---|---|---|---|---|
| California | 28 days – 4 years | 1988-1997 | 1983-1997 | 4177 | 8730 | Birth Year, Sex |
| Minnesota | 28 days – 14 years | 1988-2004 | 1976-2004 | 2170 | 8735 | Birth Year |
| New York | 28 days – 14 years | 1985-2001 | 1970-2001 | 4357 | 12041 | Birth Year |
| Texas | 28 days – 14 years | 1990-1998 | 1975-1998 | 4647 | 4732 | Birth Year, Sex |
| Washington | 28 days – 14 years | 1980-2004 | 1980-2004 | 2321 | 23728 | Birth Year |