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| Used to obtain the probability of disease in a group of people with some characteristic on the basis of the overall rate of that disease and of the likelihood of that characteristicin healthy and disease individuals |
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| A form of selection bias that leads hospital cases and controls in a case control study to be systematically different from one another. |
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| The probability of making a type 2 error, ie , the rror of failing to reject a false null hypothesis |
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Definition
| Any systematic error in the design, conduct or analysis of a study that results in a mistaken estimate of an eposure effect on the risk of disease. |
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| A distribution in which there are two peaks |
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Definition
| The criterion that an observed, presubably or putatively causal assiciation fits previously existing biological or medical knowledge |
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| The component of the populatioon born during a particular period and identified by period of birth so that its characteristics can be acsertained as it enterssuccessive time and age periods. |
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Definition
| keeping the ovserver(s) and/or subjects ingorant of the group to which the subjects are assigned. |
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