Lifetime Average Daily Dose (LADD) 1
Lifetime Average Daily Dose (LADD) 1 :
Radiation and Radiological Disasters. (a) Total dose received over a lifetime multiplied by fraction of lifetime during which exposure occurs, expressed in mg/kg body weight/day. Ordinarily used for assessing cancer risk. [REAP, 1995: Residential Exposure Assessment Project]; (b) Figure for estimating excess lifetime cancer risk. [USEPA, 1997a: EPA Terms of Environment]; (c) Dose rate averaged over a lifetime. The LADD is used for compounds with carcinogenic or chronic effects. The LADD is usually expressed in terms of mg/kg-day or other mass/mass-time units. [USEPA, 1997b: Exposure Factors Handbook]; (d) Dose that is averaged over an individual's lifetime taking into account the frequency, duration, and intensity of exposure events. LADDs are usually expressed in units of mg/kg/day. [USEPA, 1998: Postapp. Exposure Test GL.]
