Spss statistics 15

Normal distribution of continuous variables was evaluated by visual (histogram and probability plots) and analytical (Kolmogorov-Smirnov and Shapiro-Wilk tests) methods. In the descriptive findings, categorical variables are given as numbers (percent), and continuous variables are presented with mean ± standard deviation (SD) for normal scattering data and median (minimum-maximum) for normal non-scattering data. Cut-off values for hematological data were determined using receiver operating characteristic (ROC) curve analyzes. For the categorical variables, statistical difference among groups was determined by using chi-square tests. The DFS and OS ratios were determined using the Kaplan-Meier method, and the log rank test was used to determine the statistical difference. Univariate and multivariate Cox regression analyses were performed to determine the prognostic factors affecting DFS and OS. Statistical significance was accepted as p < 0.05. IBM SPSS Statistics 15.0 was used for statistical analysis of research data.

We compared categorical variables by using χ² test or 2-tailed Fisher exact test, when appropriate. We considered p<0.05 statistically significant. We performed analyses by using SPSS Statistics 15.0 (IBM, https://www.ibm.com).

For all animal behavioral test at least 7 mice, tumor xenograft models 5 mice and hair growth experiment 7 mice were randomized to each group. Results are expressed as the mean ± SEM. Differences between groups were compared using a two-tailed Student’s t-test or a two-way ANOVA followed by the Bonferroni post-hoc analysis using statistics software SPSS Statistics 15.0 (IBM SPSS Statistics, USA). The criterion for statistical significance was P < 0.05. Experimenters were blinded to all drug treatments.

Statistical analysis was performed using the IBM SPSS Statistics 15.0 statistical package to study the association between caries prevalence/severity variables and adherence to the Mediterranean diet.
The chi-squared test was used to evaluate the homogeneity of caries prevalence in the three levels of adherence to the Mediterranean diet. The Kruskal–Wallis test was used to compare the distribution of the ICCMS grade in the three levels of adherence to the Mediterranean diet. Pearson’s correlation was used to assess the degree of linear association between the KIDMED score and the number of teeth with caries. Spearman’s nonlinear correlation was used for the KIDMED score and ICCMS for each tooth.
The level of significance used in the analysis was 5% (α = 0.05). Any p-value less than 0.05 is indicative of a statistically significant relationship. In contrast, a p-value greater than or equal to 0.05 indicates no relationship.
To estimate the population prevalence from the sample of 263 individuals, there is a maximum error of 6% for p = q = 5% and a confidence level of 95%. For a chi-squared test in the current sample, with a confidence level of 95%, the power reached is 81.4% to detect two different caries prevalence rates, 70% and 85%, in two groups (such as medium and high adherence) as significantly different.

The image processing consists of the standardized axial, coronal, and sagittal MIP images. All the postprocessed images were used by the MRI readers in their interpretation of the examination. Kendall's coefficient of concordance was calculated to determine agreement between readings (IBM SPSS Statistics 15.0).