Psychological factors contribute to biological aging: Evidence from the aging rate in Chinese older adults

Aging clocks are statistical models that enable measurements of biological age, as opposed to chronological age. While the latter is determined by one's date of birth, the former depends on the intensity of aging processes and can be affected by genetics, life choices, and the environment. Most commonly, such aging clocks are regressors, trained to predict a person's chronological age based on a vector of input parameters, such as clinical blood test results, gene expression levels, or DNA methylation intensities.