In some countries, sampling focused only on those facilities offering "priority" interventions while others sampled all health facilities.
The mitochondrial casework section also analyzed the remaining seven samples and focused only on mtDNA testing for these samples following their standard operational protocols.
In addition, because of the large sample size, we focused only on highly significant effects with a p-value below 0.001.
To date, we are aware of only one epidemiological study that has investigated associations between personality traits and medication adherence in chronic disease in a random population sample; this study focused only on young adults, aged approximately 22 years [20].
Second, studies that have used interviews have had relatively small [ 13, 16, 17, 19], non-ethnically/racially diverse [ 13, 17] samples or have focused only on mothers of infants and toddlers [ 19] or mothers of girls only [ 13].
However, to delineate the main differences between the molecular signatures of PCM and MM samples, they have focused only on the differential expression profiles based on multiple hypothesis testing such as Wilcoxon test [ 19], Student's t-test [ 17] or significance analysis of microarrays (SAM) [ 9, 15, 18].
As these findings were in a small sample, focused on only one health condition (obesity) and did not specifically pertain to DTC testing, it is not clear whether they could have application to the wider PGT consumer population.
The third validation study included 420 random discharges from a nationwide sample in 2003 and focused only on admission and discharge data.
Although we had genotyping data available for other SNPs in these samples, in this study, we focused only on the CHRNA5/A3/B4 region of chromosome 15, as this region has received much attention for its association with smoking and LC [14], [15], [16], [17], [24].
This was attributed to the change in the sampling device used; the endocervical brush was introduced to replace the spatula that focused only on the sampling of squamous cells.
