Table 5 Results of the multivariable logistic regression models in loggerhead turtles (n = 281) according to sampling area, sampling year and host age-class

Spirorchiids

Sampling area

Adriatic vs Tyrrhenian

5.118

2.220–11.801

< 0.001

Sampling year

From 2011 to 2018

1.407

1.178–1.680

< 0.001

Age-class

Increasing age

2.048

1.166–3.600

0.013

H. mistroides

Sampling area

Adriatic vs Tyrrhenian

7.344

2.875–18.759

< 0.001

Sampling year

From 2011 to 2018

1.500

1.242–1.811

< 0.001

Age-class

Increasing age

1.638

0.913–2.941

0.098

Neospirorchis Neogen-11

Sampling area

Adriatic vs Tyrrhenian

5.893

1.789–19.414

0.004

Sampling year

From 2011 to 2018

1.452

1.141–1.850

0.002

Age-class

Increasing age

2.166

1.004–4.672

0.049