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Demographics
| Total patients | 852 |
| Sex | |
| Female | 415 (48.70%) |
| Age at time of Ca draw | |
| <1 year | 2 (0.23%) |
| 1–12 year | 278 (32.63%) |
| 13–17 year | 183 (21.48%) |
| Adulthood | 389 (45.66%) |
| Ethnicity | |
| Caucasian | 675 (79.20%) |
| African American | 81 (9.50%) |
| Hispanic | 40 (4.69%) |
| Other | 56 (6.57%) |
| Genotype | |
| A-D deletion | 798 (93.66%) |
| Atypical nested deletion (e.g. LCR22A-LCR22B;LCR22A-LCR22C; LCR22B-LCR22D; LCR22C-LCR22D; |
54 (6.34%) |
| Congenital heart disease | 550 (64.55%) |
