Tests for association were performed using both categorical case-control and Cox proportional hazards models [31].
This marker also impacted dimensional severity scores of schizophrenia, lending further support to the categorical case-control finding.
The small sample size, however, was somewhat mitigated by the four to eightfold increase in statistical power of a quantitative trait design over a categorical case-control analysis [4], [68].
In addition, we performed a categorical case-control allelic test of association within PLINK.
Two-way analysis of variance (ANOVA) results showed significant effect between independent variables of all modes of tobacco exposure with categorical group (controls, BPH, and PCa) of subject.
To investigate whether the implementation of the Cancer Plan has had any observable effect on survival, this research included a categorical variable controlling for calendar period of diagnosis in the multivariate analyses.
Second, by categorical class analysis (control vs. 1×) we extracted the top fifty down-regulated genes and top fifty up-regulated genes in control and in 1× samples.
The district was included as a fixed categorical effect to control for other unknown differences between the districts.
The association between type of treatment and each categorical variable (infection control, re-infection, and presence of patella baja) was analyzed with Fisher's exact test.
After matching for eight categorical variables, a control patient was selected who fitted best to the case concerning age, follow-up time and DAS28 at baseline.
