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Non-twin sibling CPA risk by twin pair CPA status
| Twin pair CPA status | Non-twin sibling CPA risk – odds ratio (95% CI) |
|---|---|
| CPA + CPA + | 4.29 (2.68 – 6.85) |
| CPA + CPA − | 1.94 (1.30 – 2.91) |
| CPA + ? | 4.64 (2.62 – 8.23) |
| CPA − ? | 2.05 (1.34 – 3.13) |
| CPA − CPA − | 1.00 ----- |
