Previous analyses of age at onset in schizophrenia, which is highly variable and appears to be influenced by familial factors, have neglected to consider either (1) the impact of censoring on correlations in age at onset in affected relatives or (2) the impact of correlated ages at onset on the rela
Estimating familial effects on age at onset and liability to schizophrenia. II. Adjustment for censored data
โ Scribed by Charles J. MacLean; Michael C. Neale; Joanne M. Meyer; Kenneth S. Kendler; D. C. Rao
- Publisher
- John Wiley and Sons
- Year
- 1990
- Tongue
- English
- Weight
- 532 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0741-0395
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โฆ Synopsis
Genetic studies of disorders with adult onset often contain individuals who have not completed their age at risk when last observed. Without correction for such censoring, correlation in ages at onset among relatives is substantially underestimated. Moreover, without correction for the effect of correlated ages at onset, the relationship between age at onset in the proband and liability in relatives is substantially overestimated. The present paper describes methods for correcting the effects of censoring on these estimates. In a companion paper [Kendler and MacLean, Genet Epidemiol7:409-417, 19901 these methods are applied to a large family study of schizophrenia.
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Family studies with age at onset of the disease as the endpoint face two important problems: censoring and correlation of age at onset among relatives. We present a multivariate survival model for ages at onset of relatives which incorporates the problems cited above. The interpretations of regressi
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