Table 4 The results of the logistic regression using odds ratio

Track electrification = yes

Track electrification = no

4.15

3.45–4.98

Station district = inside

Station district = outside

1.35

1.10–1.67

Freight traffic intensity

10 * Number of trains / 24 h

1.05

1.02–1.09

Population density

100 * inhabitants / km²

1.04

1.02–1.05

Distance to the built-up area

100 * m

0.97

0.95–0.99

Distance to the nearest road

100 * m

0.90

0.86–0.94

Elevation

100 * m

0.85

0.80–0.91