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Table 5 Generalized linear models (GLM) of Rickettsia prevalence

From: Molecular detection of Rickettsia in fleas from micromammals in Chile

Modell

Model performance

Model component

L-R χ2

df

Prob > χ2

Source of variation

Estimate

SE

L-R χ2

P-value

All bioclimatic regions

102.61

7

< 0.0001*

Intercept

2.51

0.33

60.16

< 0.0001*

Season (winter)

− 0.83

0.12

49.71

< 0.0001*

Bioclimatic region (arid)

− 0.29

0.34

0.76

0.3840

Bioclimatic region (hyper-arid)

1.00

1.24

0.65

0.4205

Bioclimatic region (hyper-humid)

− 0.18

0.46

0.14

0.7001

Bioclimatic region (semi-arid)

− 1.40

0.37

14.07

0.0002*

Location type (natural area)

− 0.42

0.15

8.02

0.0046*

Location type (city)

0.45

0.23

3.57

0.0588#

Arid

62.80

3

< 0.0001*

Intercept

2.31

0.20

314.21

< 0.0001*

Season (winter)

− 0.87

0.16

44.07

< 0.0001*

Location type (natural area)

− 0.56

0.19

10.98

0.0009*

Location type (city)

0.50

0.31

3.40

0.0652

Semi-arid

65.52

3

< 0.0001*

Intercept

0.81

0.42

3.89

0.0484*

Season (winter)

− 2.27

0.455

56.73

< 0.0001*

Location type (natural area)

0.62

0.48

1.73

0.1880

Location type (city)

− 0.99

0.79

1.35

0.2445

Sub-humid

4.45

3

0.2167

Intercept

2.96

0.33

266.75

< 0.0001*

Season (winter)

0.36

0.22

2.66

0.1026

Location type (natural area)

− 0.37

0.36

1.65

0.1992

Location type (city)

0.69

0.58

2.36

0.1241

Hyper-humid

5.08

2

0.0788

Intercept

3.51

0.69

128.38

< 0.0001*

Location type (natural area)

− 1.08

0.73

5.09

0.0240*

Location type (city)

0.38

1.09

0.00

1.0000

  1. Abbreviations: L-R, likelihood ratio; df, degrees of freedom; SE, standard error; *P ≤ 0.05, #marginally significant
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