Term
| Name the 3 types of risk estimate methods used to describe the risk of an effect from radiation exposure. |
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Definition
1. Relative risk
2. Absolute risk
3. Excess risk |
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Term
| Which type of risk estimate method is used most often? |
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Definition
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Term
| Which type of risk estimate is used when we don't have any knowledge of the dose received? (i.e. accident victims) |
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Definition
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Term
| How is relative risk calculated? |
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Definition
| # of observed cases/# of expected cases |
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Term
| If the expected (natual) risk of developing leukemia for a nonradiated group is 4 in 100,000, and the observed cases in a radiated group is 8 in 100,000, what is the relative risk? |
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Definition
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Term
| Which type of risk estimate is used when we do have knowledge of the dose received? |
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Definition
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Term
| Absolute risk is expressed as the # of cases per ***? |
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Definition
million people/RAD/year
or 10-to-the-6th/RAD/year |
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Term
| What does an absolute risk of 2 mean? |
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Definition
| If 1 million people were exposed to 1 RAD over 1 year, we would expect to see 2 cases of the effect in question. |
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Term
| When is excess risk used? |
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Definition
| When a very large number of cases of a certain effect are seen after radiation exposure. |
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Term
| How is excess risk calculated? |
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Definition
| Total observed cases in the radiated group minus number of expected (endemic) cases for a group that size. |
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