The group sizes in this study were widely different from one another, so optimal matching calling the MatchIt package (Ho et al. 2011) in the R statistical analysis software on a one-to-many fixed ratio was performed, where each comparison unit was matched to several treatment units (1 5 ratio).
Where several probes have been matched to a gene, the average value for the probes has been used: where one probe has been matched to several genes, the call for the probe has been given to each gene but the expression level for the probe has been shared amongst the genes.
However, this will generally also reduce precision because there will be fewer matched sets to analyze (14) when several exposed subjects may be matched to the unexposed subject in a single matched set.
In previous studies, the null model was restricted to SNPs on the genotyping array that were not associated with a trait but were matched to the trait-associated SNPs in several important ways, e.g. allele frequency, position relative to gene structure, and proximity to the transcription start site.
But they could still raise contributions up to a certain amount (such as $100 or $250), which would be matched several-times-over by the central fund, an incentive for politicians to opt into this system and focus on small-dollar givers.
In this way, a picture of a building could be matched against images from several different angles.
These patients were matched for several clinicodemographic variables to reduce the influence of confounding factors, including age (difference in age less than three years), gender, primary lung pathology, postoperative follow-up time (difference in postoperative follow-up time less than one year) and unilateral or bilateral transplantation (Table 4).
These doctrinal developments were matched by several substantial theoretical innovations that sought to recharacterize contract as reliance-based and thus in effect a special case of tort.
Whilst subjects in both groups were matched on several characteristics, it was not possible to match them at baseline (on commencement of nurse supplementary prescribing) on diagnostic specific, generic health or social care outcomes.
