Methods, systems, and computer program products are hereby claimed for including and distinguishing independent variables that denote lifespan in multivariable binary regression analyses of mortality and survivorship. These methods, systems, and computer program products are demonstrated here by including and distinguishing lifespan in multivariable binary regression analyses of humans' and medflies' mortality and survivorship, revealing advantages for the description, specification, measurement, analysis, explanation, and prediction of mortality and survivorship.
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