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Specifically, Friedman's two-way analysis of variance test for overall testing of several related samples, Wilcoxon's Matched Pairs Signed Rank Test, as well as the Sign Test in comparisons of two related samples, and Mann-Whitney U test for two unrelated samples were used.
The proportions of subjects who remained with a no/low caries risk score from 2005 to 2011 varied among clinics, from 90 to 24% (p = 0.090 for overall testing between clinics).
Thus, the non-parametric Kruskal Wallis test for overall testing and the Mann-Whitney-U test for pairwise testing was applied to test for differences in adhesive strength between groups.
Similarly, the proportions with a lower caries risk score in 2011 if scored with a high caries risk in 2005 varied between clinics, from 89 to 18% (p = 0.057 for overall testing between clinics).
Similar(56)
Conditional likelihood ratio chi-square test was also used for overall tests of DIF.
The adjusted R for the multivariable model was 0.054. 1 p-value for overall test for the difference in groups means, using dummy variable coding in univariable linear regression models.
However, PA questions of the present study were based on a questionnaire of the representative KiGGS study which was tested for overall test-retest reliability and for validity of PA questions, showing good results [ 42].
For branch-specific tests (Test 2), one degree of freedom was used to calculate p-values, while for the overall test (Test 1), 2 degrees of freedom were used to calculate p-values.
The average removal rate for TP was 41% for the overall testing time.
The levels of significance were 2%% (one-sided) for the overall test and 3%% for the subgroup test [ 8].
(Fisher's exact p = 0.24 for the overall test and p = 0.08 for comparing the youngest with the oldest patient group).
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