2.4. Statistical analysis
All analyses were performed using SPSS software (SPSS/PC Statistics 18.0, SPSS Inc., Chicago, IL, USA). The growth performances
were analysed using one way ANOVA with treatment as the main
effect. In order to determine the effects of the dietary treatments
and the sampling time on the blood analyses, the data were submitted to repeated measure ANOVA. For blood analyses, total antioxidant activity of whole blood and RBC measured at weaning
were used as covariates. Value from each pen was considered as
the experimental unit for growth performances. Each pig was considered as the experimental unit for blood analyses. Data are presented as means ± SE, and a value of P < 0.05 was used to
indicate statistical significance.