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Table 4 Model estimations based on four threshold levels for departure delay determinants

From: Framework for determining airport daily departure and arrival delay thresholds: statistical modelling approach

Characteristic

Adjusted odds ratio

Threshold 1 (50 %)

Threshold 2 (60 %)

Threshold 3 (70 %)

Threshold 4 (80 %)

Arrival threshold

2.871**

0.457**

0.203**

1.000

Arrival delay

0.891**

1.011

1.003

0.978

Aircraft operations

0.541*

1.288**

1.810**

4.815

Scheduled flights

1.910*

0.651**

0.466**

0.002

Chartered flights

1.723*

0.635**

0.485**

0.002

Freighters

2.145**

0.827**

0.598**

0.002

Non-commercial

2.224**

0.842**

0.584**

0.002*

Persons outgoing

0.999*

1.000

1.001**

1.002

Persons incoming

1.001

1.000

1.000

0.999

Visibility

0.999

0.999*

1.000

1.000

Wind speed

1.003

1.038

1.039

1.005

Constant

4.794

62.914**

1.710

0.339

Observations (N)

1827

1827

1827

1827

Covariate patterns

1827

1827

1827

1827

Pearson chi2

3312.400

1703.820

2000.380

1092.990

Prob > chi2

0.000

0.970

0.001

1.000

Area under ROC curve

0.841

0.887

0.875

0.807

  1. * represents 0.05 and ** represents 0.01 statistical levels of significance