In order to examine whether the method of
iron administration was associated with an increase
of the proportion of piglets with Fe, Hb and Hct levels
in the higher quartiles of known reference values,
Cochran-Armitage’s test for trend was used. The following
reference values were used: Fe 94.9-201.1 μg/
dL, Hb 10-16 g/dL, Hct 32-50%. Statistical analysis
was conducted using the statistical packages Statistica
and Statgraphic Centurion.
Statistical analysis of productivity performance
Data were entered into an Excel spreadsheet
(Microsoft Excel 2010) and imported into Stata (Stata
8 Intercooled for Windows 9x) in which data were
analyzed. Descriptive analysis was completed using
Minitab version 14 (MiniTabR14b) and Excel (Microsoft
Excel 2010). For ADG, the differences among
the methods of iron administration were statistically
analyzed with a one-way ANOVA test in a completely
randomized design using Statistical Packages for the
Social Sciences [15]. The significant differences among
means were compared using Post Hoc Test. Mortality
rates were analyzed in a logistic regression using the
procedure GENMOD in SAS (chisquared (χ2) values
were generated as the test statistic) and the results are
expressed in percentages.