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Table 3 Parameter estimates for number of adult I. ricinus ticks on red squirrel, badger, red fox and roe deer in Norway

From: Tick infestation on medium–large-sized mammalian hosts: are all equally suitable to Ixodes ricinus adults?

Parameter

Estimate

SE

z

P

Count part of model

Intercept

0.984

0.533

1.84

0.065

Body mass

−0.056

0.064

−0.88

0.377

Red fox

1.454

0.380

3.83

 < 0.001

Roe deer

4.301

0.883

4.87

 < 0.001

Red squirrel

1.729

0.768

2.25

0.024

Zero-inflation model

Intercept

3.191

1.135

2.81

0.005

Body mass

−1.713

0.890

−1.93

0.054

  1. Baseline was badger for species. The model consists of a zero-inflated part (logistic regression of excess zero counts) and a count part (negative binomial regression)