Choice of ascertainment model I

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Abstract
A statistical method for choosing between ascertainment models for human family data was constructed. The families were assumed to be ascertained through a single proband each and the birth number of the proband among the affected children is recorded. If the proband is the eldest affected child in each family the so-called complete ascertainment model has to be used. If each affected child has the same probability of being the proband, the single ascertainment model should be used. In intermediate cases a 3rd ascertainment model should be used.