Differences in frequencies of different classes (transversions, insertions, insertions and deletions) or types (GC-TA, InsG, CG-TA) of mutations were tested using the hypergeometric test.
These results confirmed the differences in frequencies of some genetic variations among different ethnic groups and different geographic regions.
The chi-squared test or Fisher's exact test was used to determine differences in frequencies of the IL-10 promoter polymorphisms among trauma patients with different genotypes.
The analysis showed significant differences in frequencies of wrist motion (p<0.05) between the production systems.
Statistical differences in frequencies of lymphocyte subsets before and after measles were analysed by two-tailed paired t-test or Wilcoxon signed-rank test.
No differences in frequencies of genotypes or alleles between cases and controls for any polymorphism individually were found by χ2 analysis (p = 0.444, p = 0.507 and p = 0.662, respectively).
Our analysis indicates that inadequate statistical power, racial/ethnic differences in frequencies of alleles, haplotypes and haplotype combinations, potential gene-gene or gene-environment interactions, publication bias, and multiple hypothesis testing may contribute to the significant heterogeneity in previous studies of CAPN10 and T2D.
Chi-square test was used to assess the differences in frequencies of sugar and plant tissue feeding between mosquitoes in the two oases.
When we compared clinicopathological characteristics between the discovery set and the external dataset, there were significant differences in frequencies of stage (Table S1).
Differences in frequencies of tetramer-binding B cells between SLE patients and healthy controls and in different B cell subsets between patients grouped according to disease activity were determined using the unpaired, t tests.
This result reflects the fact that only the African population is differentiated from the homogeneous non-African ones, which is mainly due to differences in frequencies of haplotypes A2 and A7 (Figure 2).
