The strata-specific risk ratio for the group of untreated SIV-infected macaques was 2.2 (P = 0.02, Fisher's exact) and the relative risk for the treated group of SIV-infected macaques was 3.3 (P = 0.066, Fisher's exact).
However, none of the noted differences in the strata specific odds ratios achieved statistical significance.
When the ratio of strata to sample size becomes too large, many strata may never be filled or hold only one or two patients.
Seaside towns are built on strata upon strata of happy memories; a sort of emotional geology.
We also calculated hazard ratios within strata defined by thirds of the propensity score distribution.
The hazard ratios in strata 1 to 5 were 0.69, 1.37, 1.55, 0.75, and 1.19, respectively, and none was statistically significant.
We performed pairwise comparisons of prevalence of the symptom clusters, symptom index, and the positivity rate of CA125, HE4 and ROMA index according to tumor malignancy and stage strata, using unadjusted odds ratios with 95% CI.
Differences of change over time between the three educational levels are documented by strata-specific odds ratios, and their significance is indicated by the significance level of the respective interaction term of the regression model.
The analysis results showed that comprehensive pullman's thickness of overburden strata, disturbance coefficient, mining thickness ratio and etc. are the key influence factors to the mining subsidence.
Again, let C denote a binary confounder (C = 1 or C = 2), and let k1 and k2 denote, respectively, the control-to-case ratio in the strata C = 1 and C = 2.
