CRAN: https://CRAN.R-project.org/package=di
A set of utilities for calculating the Deficit (frailty) Index (DI) in gerontological studies. The deficit index was first proposed by Arnold Mitnitski and Kenneth Rockwood and represents a proxy measure of aging and also can be served as a sensitive predictor of survival.
References:
- Mitnitski A.B., Mogilner A.J., and Rockwood K. (2001) Accumulation of Deficits as a Proxy Measure of Aging. The Scientific World Journal, 1:323-336. [ doi:10.1100/tsw.2001.58 ] [ PMID: 12806071 ]
- Mitnitski A.B. et al. (2002) Frailty, fitness and late-life mortality in relation to chronological and biological age. BMC Geriatrics, 2:1. [ doi:10.1186/1471-2318-2-1 ] [ PMID: 11897015 ] [ PMCID: PMC88955 ]
- Kulminski A. et al. (2006) Accumulation of health disorders as a systemic measure of aging: Findings from the NLTCS data. Mech Ageing Dev, 127(11):840-8. [ doi:10.1016/j.mad.2006.08.005 ] [ PMID: 16978683 ] [ PMCID: PMC1764645 ]
- Kulminski A. et al. (2007) Cumulative index of health disorders as an indicator of aging-associated processes in the elderly: Results from analyses of the National Long Term Care Survey. Mech Ageing Dev, 128(3):250-8. [ doi:10.1016/j.mad.2006.12.004 ] [ PMID: 17223183 ] [ PMCID: PMC1866299 ]
