Table 4 Factors affecting road traffic accident injury severity levels in Addis Ababa, Ethiopia, from October 2017- July 2020

Driver sex

Male (Ref)

Female

-0.093

0.912

0.068

-1.379

0.168

Driver’s age

 < 18 years (Ref)

18–30 years

0.175

1.373

0.060

2.904

0.004**

31–50 years

0.461

1.349

0.064

7.244

0.000***

 > 50 years

0.412

1.282

0.068

6.098

0.000***

Driver educational level

High school and lower (Ref)

College and above

0.369

1.447

0.048

7.664

0.000***

Driving experience

1–2 years

-0.203

0.816

0.060

-3.401

0.001***

3–5 years

-0.044

0.957

0.069

-0.637

0.524

6–10 years

-0.373

0.689

0.078

-4.801

0.000***

 > 10 years

-0.477

0.620

0.070

-6.789

0.000***

Day of crash

Monday (Ref)

Tuesday

0.065

1.067

0.080

0.807

0.420

Wednesday

0.028

1.029

0.080

0.353

0.724

Thursday

0.072

1.075

0.078

0.924

0.355

Friday

0.455

1.576

0.088

5.14

0.000***

Saturday

-0.004

0.996

0.078

-0.048

0.961

Sunday

0.182

1.200

0.079

2.307

0.021*

The type of crash

The crash with pedestrian (Ref)

Crash with another vehicle

-0.287

0.751

0.094

-3.044

0.002**

Roll over

0.386

1.471

0.143

2.698

0.007**

Crash with animal or objects

-0.033

0.967

0.132

-0.25

0.803

Others

0.342

1.408

0.175

1.955

0.051

The type of vehicle

Two or three wheelers (Ref)

Public transport

0.247

1.280

0.074

3.359

0.001***

Commercial truck

0.464

1.590

0.077

6.036

0.000***

Automobile

0.111

1.117

0.079

1.398

0.162

Others

1.355

3.878

0.148

9.179

0.000***

The owner of the vehicle

Private (Ref)

Government

0.192

1.211

0.070

2.725

0.006**

Others

0.143

1.154

0.097

1.483

0.138

Movement of vehicle

Straight (Ref)

Curved

0.216

1.241

0.068

3.181

0.001**

Reverse

-0.072

0.930

0.127

-0.569

0.569

Parked

0.313

1.368

0.189

1.662

0.096

Others

1.067

2.906

0.195

5.474

0.000***

Victims of the crash

Driver (ref)

Passenger

-0.360

0.698

0.092

-3.889

0.000***

Pedestrian

-0.347

0.418

0.049

-3.752

0.000***

Motorcyclist

-0.456

0.634

0.117

-3.895

0.000***

Motorcycle passenger

0.369

1.447

0.145

2.541

0.011*

Sex of the victims

Male (Ref)

Female

-0.064

0.938

0.049

-1.315

0.189

Movement of pedestrian

Crossing (Ref)

Walking

-0.281

0.755

0.048

-5.849

0.000***

Sitting

-0.110

0.896

0.092

-1.2

0.230

Other

3.285

26.708

0.215

15.248

0.000***

Division of roads

Round about

One lane

-0.542

0.582

0.086

-6.33

0.000***

Two lanes

-0.432

0.649

0.058

-7.502

0.000***

Others

-0.452

0.636

0.086

-5.248

0.000 ***

Sub-city of accidents

Akaki Kality (Ref.)

Arada

0.326

1.385

0.121

2.686

0.007**

Nifas Silk

-0.467616

0.626

0.088

-5.325

0.000***

Bole

0.845

2.328

0.108

7.809

0.000***

Yeka

0.569

1.767

0.119

4.801

0.000***

Kolfe Keraniyo

0.162

1.176

0.099

1.635

0.102

Addis Ketema

-0.497

0.608

0.114

-4.355

0.000***

Kirkos

-0.228

0.796

0.106

-2.156

0.031*

Gulele

-1.079

0.340

0.130

-8.277

0.000***

Lideta

-0.008

0.992

0.114

-0.066

0.947

Type of road

Straight (Ref)

Zigzag

0.607

1.835

0.238

2.549

0.011*

Curve

-1.027

0.358

0.079

-12.979

0.000***

Tilted

0.118

1.125

0.123

0.959

0.338

Hill

0.021

1.021

0.135

0.152

0.879

Intersection

Yes

1

No

0.045

1.046

0.047

0.949

0.343

Time of crash

Morning

1

Afternoon

-0.192

0.825

0.076

-2.53

0.011*

Evening

-0.201

0.818

0.077

-2.618

0.009**

Night

-0.238

0.788

0.079

-3.009

0.003**

Light condition

Sun light (ref)

Dusk

0.143

1.154

0.180

0.798

0.425

Down

0.497

1.644

0.143

3.482

0.000***

Dark with good light

0.315

1.370

0.074

4.257

0.000***

Dark with poor light

0.141

1.151

0.089

1.589

0.112

Dark

0.532

1.703

0.088

6.069

0.000***

Air condition

Good air (Ref)

Foggy

-0.126

0.881

0.163

-0.773

0.439

Cloudy

0.242

1.274

0.152

1.597

0.110

Rainy

-0.148

0.862

0.091

-1.63

0.103

Model summary

The number of obs. = 8458

Log likelihood = -7458

LR Stat = 2141.8

Prob > Chisq. = < 0.000

Pseudo.R2 = 0.258053