Asunto(s)
Fisura del Paladar/genética , Niño , Femenino , Humanos , Masculino , Probabilidad , Factores de Riesgo , Factores SexualesAsunto(s)
Fisura del Paladar/genética , Genes Dominantes , Modelos Genéticos , Niño , Humanos , ProbabilidadRESUMEN
The study covered 1009 families with CL +/- P and 490 families with CP coming from the region of southern Poland wherein the incidence is 1.3/1000 for CL +/- P and 0.51/1000 for CP. The empiric recurrence risk of CL +/- P and CP was 1.6% +/- 0.66 and 0.93% +/- 0.75, respectively. It was found that the risk of CL +/- P recurrence was three times greater among the sibs of male probands in comparison to that of female index cases. The relative risk of malformation recurrence in a family with one of the offspring already affected was 14.57 for CL +/- P and 19.85 for CP. The heritability values, calculated according to Falconer's formula were found to be 54.77% +/- 5.07 for CL +/- P and 52.79% +/- 8.63 for CP and suggested the significant effect of environmental factors on the etiology of these anomalies.
Asunto(s)
Labio Leporino/epidemiología , Fisura del Paladar/epidemiología , Algoritmos , Humanos , Polonia , RiesgoRESUMEN
A complex segregation analysis based on the maximum likelihood method was applied on a sample of 329 families with CP and 687 families with CL +/- P. The results for CP malformations were equivocal, since the authors were unable to distinguish between the hypothesis of recessive inheritance with complete penetrance (chi 2 = 19.60) and that of multifactorial inheritance (chi 2 = 20.38). For CL +/- P lesions the most plausible hypothesis seemed to be that of dominant inheritance with low penetrance (t = 0.277) and relatively high frequency of phenocopies. For these hypotheses the values Q of theoretical recurrence risk were computed and presented.