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Efficacy of a Composite Biological Age Score to Predict Ten-Year Survival among Kansas and Nebraska Mennonites
Uttley, Meredith Crawford, Michael H.
Uttley, Meredith
Crawford, Michael H.
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Abstract
In 1980 and 1981 Mennonite descendants of a group of
Russian immigrants participated in a multidisciplinary study of biological
aging. The Mennonites live in Goessel, Kansas, and Henderson,
Nebraska. In 1991 the survival status of the participants was
documented by each church secretary. Data are available for 1009
individuals, 177 of whom are now deceased. They ranged from 20
to 95 years in age when the data were collected. Biological ages
were computed using a stepwise multiple regression procedure based
on 38 variables previously identified as being related to survival,
with chronological age as the dependent variable. Standardized residuals
place participants in either a predicted-younger or a predictedolder
group. The independence of the variables biological age and
survival status is tested with the chi-square statistic. The significance
of biological age differences between surviving and deceased
Mennonites is determined by t test values. The two statistics provide
consistent results. Predicted age group classification and survival
status are related. The group of deceased participants is generally
predicted to be older than the group of surviving participants, although
neither statistic is significant for all subgroups of Mennonites.
In most cases, however, individuals in the predicted-older groups
are at a relatively higher risk of dying compared with those in the
predicted-younger groups, although the increased risk is not always
significant.
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This is the published version. Copyright 1994 Wayne State University Press.
Date
1994-02
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Wayne State University Press
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Citation
Uttley, Meredith, and Michael H. Crawford. "Efficacy of a Composite Biological Age Score to Predict Ten-Year Survival among Kansas and Nebraska Mennonites." Human Biology 66.1 (1994): 121-44. Web.