The phrase "ascertain sample" is correct and usable in written English.
It can be used in contexts where you need to determine or verify a sample, often in research or analysis settings.
Example: "Before proceeding with the experiment, we need to ascertain the sample to ensure its validity."
Alternatives: "determine sample" or "verify sample".
Specifically, maternal smoking was investigated both as a covariate and with regards to its main and interactive effects on child IQ in a prospectively ascertained sample of children whose mothers reported pregnancy exposures to four classes of agents: varicella virus infection (VC), selective serotonin reuptake inhibitors (SSRIs), antiepileptic drugs (AEDs) and benzodiazepines (BZDs).
The METSIM cohort is a randomly ascertained sample of 10,197 men aged 45 70 from Kuopio, Eastern Finland [ 20].
The use of a well characterized, epidemiologically ascertained sample with detailed demographic and psychosocial assessments allowed for well-matched samples in terms of age, gender, and handedness.
Second, we used rejection sampling to simulate an ascertained sample in which at least one sibling was affected (D S is always affected).
Since we use ZAPLO to estimate the haplotype probabilities from an ascertained sample, these probability estimates may not be unbiased estimates of the true probabilities.
All neutrality tests were carried out using data obtained with an initially ascertained sample of 80 chromosomes, except in the Fay and Wu test, where an extended sample of 80 genotyped individuals was used.
Despite an excess of females to males of about 2 to 1 for unipolar depression, the heritability in a clinically ascertained sample was the same in men and women [ 1].
Thus, there is a need for a gout GWAS in clinically ascertained sample sets in order to identify non-serum urate genetic risk factors for gout (for example, TLR4) which are likely to have weak effects (OR <1.4).
