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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.