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Table 2 Association analysis of the impact of different factors on worm condition in the main experiment .

From: Diversity and specificity in the interaction between Caenorhabditis elegans and the pathogen Serratia marcescens

Factor

Test

χ 2

d.f.

P

Single factor effects

Bacteria

LRT

291.05

8

< 0.0001

Worm strain

LRT

154.84

14

< 0.0001

Worm genotype

LRT

136.29

6

< 0.0001

Run

LRT

186.33

8

< 0.0001

Factor effects in consideration of one of the others (in brackets)

Bacteria (Worm strain)

CMH

196.74

4

< 0.0001

Bacteria (Worm genotype)

CMH

196.44

4

< 0.0001

Bacteria (Run)

CMH

192.08

4

< 0.0001

Worm strain (Bacteria)

CMH

146.21

7

< 0.0001

Worm strain (Run)

CMH

139.83

7

< 0.0001

Worm strain (Worm genotype)

CMH

10.32

7

0.1713

Worm genotype (Bacteria)

CMH

135.50

3

< 0.0001

Worm genotype (Run)

CMH

129.34

3

< 0.0001

Run (Bacteria)

CMH

52.56

4

< 0.0001

Run (Worm strain)

CMH

51.09

4

< 0.0001

Run (Worm genotype)

CMH

50.89

4

< 0.0001

  1. The associations were assessed with the likelihood ratio test (LRT) or the Cochran-Mantel-Haenszel (CMH) test. Bold probabilities are significant after Dunn-Sidák correction.