complete ascertainment

com·plete as·cer·tain·ment

method by which all families with at least one affected person in a population are certain or have an equal chance of being identified by survey or an appropriate random sampling technique.
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Rates of Down syndrome at livebirth by one-year maternal age intervals in studies with apparent close to complete ascertainment in populations of European origin: a proposed revised rate schedule for use in genetic and prenatal screening.
This cohort has complete ascertainment and follow-up at 15-29 years of age until 31st December 2011.
More complete ascertainment is needed globally to better understand pertussis epidemiology and transmission, thereby facilitating the development of improved vaccines and vaccination strategies to improve future disease control.
Studies with complete ascertainment of prenatally diagnosed NTD cases indicate that fortification has prevented up to 50% of NTDs (1).
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