Skip to main content

Advertisement

Table 1 Two-tailed welch's t tests and wilcoxon rank sum tests comparing pathogen and immune variables between seasons

From: Gastrointestinal helminths may affect host susceptibility to anthrax through seasonal immune trade-offs

Variable N (Wet, Dry) df t , U , or T p -value before correction Holm's corrected p -value Mean Difference # Higher Group
Population-Level        
GIsqrt 45, 24 66.9 5.36 0.000*** 0.000*** 1771 Wet
log2PA 45, 24   643+ 0.095. 0.379 4.34 Wet
Ecto 45, 24   493+ 0.553 1.000 0.15 Dry
logEos 45, 24 55.3 5.07 0.000*** 0.000*** 240 Wet
logMonos 45, 24 43.1 0.45 0.653 1.000 34.1 Dry
logIgE 45, 24 32.6 0.40 0.690 1.000 1.01 Dry
IgGsqrt 45, 24 59.1 2.36 0.022* 0.109 1.44 Wet
IL-4 5, 37   101+ 0.686 1.000 15.2-fold Wet
IFN-γ 6, 37   78.0+ 0.249 1.000 3.0-fold Dry
Individual-Level        
GIsqrt 32, 32 31 5.35 0.000*** 0.000*** 1877 Wet
log2PA 32, 32   273+ 0.663 1.000 0.19 Dry
Ecto 32, 32   78.0+ 0.005** 0.022* 2.41 Dry
logEos 32, 32 31 5.11 0.000*** 0.000*** 214 Wet
logMonos 32, 32 31 0.19 0.850 1.000 17.3 Dry
logIgE 32, 32 31 1.99 0.056. 0.167 1.82 Wet
IgGsqrt 32, 32 31 2.70 0.011* 0.044* 1.85 Wet
IL-4 9, 9   8.50+ 0.608 1.000 1.6-fold Wet
IFN-γ 6, 6   9.50+ 0.916 1.000 1.1-fold Dry
  1. Note.— “Population-Level” = first animal samplings compared between seasons; “Individual-Level” = first and second samplings of the same individuals compared between seasons.
  2. +are Wilcoxon rank sum test results, using the test statistic U for unique comparisons, or are Wilcoxon signed rank test results, using the test statistic T for paired comparisons.
  3. #Mean differences are differences between non-transformed means in the two seasons; fold differences are shown for IL-4 and IFN-γ, as per convention. Units for mean differences are epg for GIP; log2 titer for log2PA; number of ticks for Ecto; cells/μl of blood fo and mg/ml for IgG.
  4. . p≤ 0.1; *p≤ 0.05; **p≤ 0.01; ***p≤ 0.001.