Spss 14 for windows

SPSS for windows 14.0 (SPSS Inc, Chicago; IL) was used for statistical analysis. Variables are described as meanÂ + -standard deviation (SD) or percentages. Clinical significance of radiological finding were analyzed with chi-square test and when a cell have expected count less than five with Fishers’ exact test. Odds ratio (OR) and 95% confidence intervals (CIs) were given for each significant radiological variable. For the calculation of correlations between CXR and CT findings, kappa statistics were used. In multivariate analyses, all of the radiological parameters were included due to their clinical significance.

The data were collected in a database (Microsoft Access 2.0, Microsoft Corporation, Seattle, USA) and evaluated retrospectively. Unless otherwise specified, the data are expressed as median and range. Survival analysis was determined by means of the Kaplan-Meier method (log-rank test) and specific risk factors by the Mann-Whitney U test using SPSS for Windows 14.0 (SPSS Inc. Chicago, IL, USA). A P value below 0.05 was considered to be significant.

Statistical analyses were performed with the SPSS software package (SPSS for Windows 14.0, SPSS, Chicago, IL, USA). One-way analysis of variance (ANOVA) was used to evaluate group comparison. If the group by each time interaction was significantly different (p < 0.05), differences between groups were compared with a post hoc test (Tukey’s). Data represents the average of three independent experiments.

The correlation between clinicopathological features and protein expression was explored using the Chi square test. For 2 × 2 tables, Fisher’s exact test was used. The association among CXCR-4, PKC-δ, and CD133 expression was calculated by Spearman’s correlation analysis. The Kaplan–Meier method was used to generate the overall and disease-free survival curves, and the log-rank test was employed to compare the two curves. The time between therapy and recurrence or metastasis or disease-related mortality was measured to determine disease-free survival. The cases were censored either at the time of death for patients who died during the study or at the time of the last examination for patients who did not receive a follow-up examination. The Cox proportional hazards regression model was used to perform the Univariant and Multivariant survival analyses. The survival analysis was done using SPSS software (SPSS for windows 14.0, SPSS Inc., Chicago, IL, USA) and the statistical analyses were done with Acastat Statistical software, version 6.1 (Acastat Software, Winter Garden, Florida, USA). For all statistical studies, a p < 0.05 was considered significant. Multiple tests were used without adjustments due to the exploratory nature of the study.