Sentence examples similar to a positive ascertainment from inspiring English sources
However, HBV DNA ascertainment by PCR revealed a positive result.
As a positive control to test for any bias in ascertainment, we used a common (allele frequency ∼50%) single nucleotide polymorphism (SNP) marker within the 9p21 CDKN2A/B locus which has been robustly associated with CAD in European [19] [21] and in Asian populations [19], [22], including in Korea [23], [24].
That study found a positive association between SES and risk of ASD based on ascertainment through health care providers, but not based on ascertainment only from school records [14].
Consequently, QOF indicators for the ascertainment and recording of smoking status could potentially have a positive impact on public health and, in the original 2004 QOF, 8% of quality payments could be obtained for smoking-related medical care.
Studies ascertaining cases of type 2 diabetes by self report involved uncertainty in ascertainment, and thus numbers of cases were revised by a positive predictive value (proportion of verified cases among self reported cases) (see supplementary information and table S3).
Also in that study only those subjects with urinary abnormalities or a positive response to a risk factor assessment questionnaire underwent blood testing, thus raising concerns of an ascertainment bias.
We hypothesized that current pyrethroid pesticide exposure would be associated with a positive ADHD diagnostic status and an increased number of ADHD symptoms in a nationally representative sample of U.S. children when ascertainment included an ADHD-specific diagnostic measure.
The ascertainment of CAs may have been higher in cases because of the cancer investigations, which would produce a positive bias in the risk estimate (Rothman and Greenland, 1998).
