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. Author manuscript; available in PMC: 2015 May 1.
Published in final edited form as: Health Phys. 2014 May;106(5):535–544. doi: 10.1097/HP.0000000000000004

Table 2.

Characteristics of basement winter short-term and basement annual radon measurements (Bq m−3) as well as their differences from 158 residences in Iowa

Characteristic Basement
Winter Short-Term
Electret Ion Chamber Test		 Basement
Annual
Alpha Track Test		 Difference
| Short-Term - Annual |
Geometric Mean (GSD) 199 (2.0) 181 (2.0) 34 (3.6)
Range 42 – 1331 32 – 1787 0.39 – 738
25th Percentile 129 110 19
Median 185 186 38
75th Percentile 297
 266
 74
≥ 148 Bq m−3 63% 60%