| truncate ascertainment | Method of locating affected individuals in which probability of locating any specific patient has a known value between 0 and 1. Synonym: truncate ascertainment. (05 Mar 2000) |
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| truncate | To cut off or to appear to have been cut off. (09 Oct 1997) |
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| ascertainment | In epidemiological and genetic research, the method by which a person, pedigree, or cluster is brought to the attention of an investigator; has a bearing on the interpretation of segregation ratios, concordance rates, linkage analysis, and other probability features. (05 Mar 2000) |
| complete ascertainment | Method by which all families with at least one affected individual in a population are certain or have an equal chance of being identified by survey or an appropriate random sampling technique. (05 Mar 2000) |
| single ascertainment | Method of ascertainment of locating affected individuals by hospital or clinic admission or another way in which probability of encountering the same family twice approaches zero; thus, the probability that a family will be ascertained is proportional to the number of affected members. (05 Mar 2000) |
| incomplete ascertainment | Method of locating affected individuals in which probability of locating any specific patient has a known value between 0 and 1. Synonym: truncate ascertainment. (05 Mar 2000) |
| total ascertainment | Method by which all members of a population at risk of a trait are discerned or equally likely to be contained in a sample thereof. (05 Mar 2000) |