Biomaterial Database

Predicting the annual concentration of indoor 222Rn from one or more short-term measurements. 1994

S B White, and B V Alexander, and N F Rodman

Research Triangle Institute, Research Triangle Park, NC 27709-2194.

Long-term and short-term measurements of indoor 222Rn from 480 houses located in eleven states were used to study the relationship between the annual living area average (ALAA) and 1) a single 2 d measurement and 2) the mean of multiple 2 d measurements (taken in different seasons). Of particular interest is the issue of using a short-term measurement(s) to predict the ALAA in a given house. The results indicate that with 95% confidence (approximately): 1) a single 2 d measurement gives an interval estimate of the true ALAA that is within a factor of 2.5 of the predicted ALAA; and 2) a mean of two 2 d measurements (taken in different seasons) gives an interval estimate that is within a factor of 2.2 of the predicted ALAA. If a more precise estimate of the ALAA is needed, then an alternative procedure to using 2 d measurements should be employed (e.g., measure the annual concentration directly).

UI	MeSH Term	Description	Entries
D011886	Radon	A naturally radioactive element with atomic symbol Rn, and atomic number 86. It is a member of the noble gas family found in soil, and is released during the decay of RADIUM.	Actinon,Thoron (Element)
D005544	Forecasting	The prediction or projection of the nature of future problems or existing conditions based upon the extrapolation or interpretation of existing scientific data or by the application of scientific methodology.	Futurology,Projections and Predictions,Future,Predictions and Projections
D006798	Housing	Living facilities for humans.	Family-Patient Lodging,Patient-Family Lodging,Family Patient Lodging,Family-Patient Lodgings,Lodging, Family-Patient,Lodging, Patient-Family,Lodgings, Family-Patient,Lodgings, Patient-Family,Patient Family Lodging,Patient-Family Lodgings
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000396	Air Pollutants, Radioactive	Pollutants present in air which exhibit radioactivity.	Radioactive Air Pollutants,Pollutants, Radioactive Air
D014481	United States	A country in NORTH AMERICA between CANADA and MEXICO.
D016902	Air Pollution, Indoor	The contamination of indoor air.	Air Quality, Indoor,Indoor Air Pollution,Indoor Air Quality,Pollution, Indoor Air