Table 3 Aggregate SCP analysis: mixed-effect logistic regression (n=2638)

SCP indices

 Increased risk

2.80

0.27

10.85

0.00

2.33

3.37

 Increased effort

2.71

0.44

6.18

0.00

1.98

3.72

Control^a

 00:00–05:59

1.11

0.20

0.60

0.55

0.78

1.58

 06:00–11:59

2.21

0.59

2.96

0.00

1.31

3.74

 12:00–17:59

1.19

0.35

0.58

0.56

0.67

2.10

Weapons present

0.27

0.04

−8.76

0.00

0.20

0.36

Vessel status

2.20

0.41

4.30

0.00

1.54

3.16

Vessel type

0.98

0.16

−0.14

0.89

0.71

1.35

 1 Qtr.

1.44

0.30

1.78

0.07

0.96

2.16

 2 Qtr.

0.99

0.20

−0.06

0.95

0.66

1.48

 3 Qtr.

0.95

0.20

−0.23

0.82

0.64

1.43

Number of pirates

0.97

0.17

−1.71

0.09

0.94

1.00

Year

0.98

0.02

−1.04

0.30

0.94

1.02

Model

 Constant

1.44e+19

6.20e+20

1.02

0.31

2.90e−18

7.12e+55

 Log likelihood

−594.69

 Wald χ² (p)

245.91 (0.00)