If multiple events are ascertained, for example a revascularization, myocardial infarction, a stroke, and heart failure, only one is represented in the analysis.
Many great works of painting and sculpture, for example, were created to glorify a deity and not, insofar as can be ascertained, for an aesthetic purpose (to be enjoyed simply in the contemplation of them for their own sake).
Treatment outcomes were ascertained for 225 persons.
The percentage of correct responses was ascertained for all trials.
Exposure to the antidementia drugs was ascertained for each subject.
Significance was ascertained for these parameters over 10,000 permutations.
Death and residential status were ascertained for all 667 participants, and re-admission was ascertained for 644 participants.
One might normally expect a higher loss rate for D than I as it requires a longer follow-up period, however, it may be easier to obtain the former, particularly if it can be ascertained from medical records (for example, death), in which case a lower attrition rate on D may be a plausible assumption.
How attachment is expressed shows cultural variations which need to be ascertained before studies can be undertaken; for example Gusii infants are greeted with a handshake rather than a hug.
For example, additional factors such as behavior (food consumption, drug use, and/or exercise patterns), geographic location, and occupation must also be ascertained to account for associated risk factors and reverse causality.
