Ascertainment of correct comprehension of the medical and supporting information and clarification of any doubts and misunderstandings (at the time of admission).
Globally, the World Malaria Report shows recent declines in malaria cases and deaths [8], [9], possibly reflecting a combination of real progress and improved ascertainment of correct information.
In our case the finding could also be confounded by high number of unknown dates and ascertainment of correct date was not possible.
In our current study, the accuracy of case ascertainment (correct identification of patients with a first-ever emergency admission for cancer) was improved by linking hospital data with primary care data for a ten-year study period.
Many a cash dividend honestly declared as a distribution of profits, proves later to have been paid out of capital, because errors in forecast prevent correct ascertainment of values.
The issue of unclassified variants in cancer predisposing genes is very important both for the correct ascertainment of cancer risk and for the understanding of the basic mechanisms of cancer gene function and regulation.
Understanding the factors associated with detection of smoking in general practice is also crucial to improving correct ascertainment of smoking status and therefore the provision of appropriate smoking cessation interventions.
Of the 2,001 migraineurs who participated (mean age 42.7, 74.2% female), 1,856 (92.8%) reported at least one associated symptom (nausea, vomiting, photophobia, or phonophobia) at headache onset during their attack, providing supporting evidence that participants were correct in their ascertainment of migraine.
In Norway, there was a change in ascertainment of ILI during the study period, and this was corrected for in the analysis in consultation with those responsible for collecting the data.
This ascertainment corrected version of the likelihood function is also useful in a Bayesian setting, for an example see Katzman et al. [14], where it was used in a Bayesian Hierarchical model for estimating distributions of selection coefficients from divergence ascertained data.
This effect might reflect a change in liver cancer detection strategies that resulted in under ascertainment of liver cancers, principally in older age groups, in the years 2001 2005, and which was corrected in more recent years.
