1.3.8 Statistical Methods
SPSS 17.0 was employed to process the data. The data was analyzed using the homogeneity test of variance and normality test. Measurement data were expressed as mean ± SEM. Univariates between groups were analyzed using the t-test. Data among groups were analyzed by ANOVA. Heterogeneity of variance was analyzed using a non-parametric test.P <0.05 was considered statistically significant.