Table 2

Generalised ordered logit regression coefficients and 95% CIs of severity of RTIs

VariablesThreshold between
No injury and mild injuryMild and moderate injuryModerate and severe injurySevere and fatal injury
β95% CIp Valueβ95% CIp Valueβ95% CIp Valueβ95% CIp Value
Driver’s gender
 Male (ref)0.0000.0000.0000.000
 Female0.609(0.506, 0.712)0.000−0.057(−0.128, 0.014)0.115−0.431(−0.546, −0.316)0.000−0.458(−0.606, −0.312)0.000
Driver’s age
 <200.459(0.308, 0.611)0.0000.192(0.075, 0.309)0.0010.124(−0.021, 0.268)0.093−0.027(−0.198, 0.144)0.755
 20–240.197(0.091, 0.304)0.0000.042(−0.048, 0.132)0.362−0.076(−0.188, 0.036)0.185−0.111(−0.240, 0.017)0.089
 25–290.055(−0.049, 0.158)0.3020.030(−0.059, 0.119)0.508−0.203(−0.314,−0.091)0.000−0.406(−0.537, −0.276)0.000
 30–340.021(−0.089, 0.131)0.7060.017(−0.077, 0.111)0.727−0.236(−0.356, −0.116)0.000−0.407(−0.549, −0.266)0.000
 35–390.062(−0.060, 0.183)0.3190.060(−0.043, 0.163)0.255−0.152(−0.282, −0.023)0.021−0.238(−0.389, −0.087)0.002
 40–44−0.009(−0.142, 0.124)0.8920.035(−0.079, 0.148)0.549−0.113(−0.258, 0.032)0.127−0.162(−0.331, 0.007)0.060
 45–490.013(−0.104, 0.129)0.8300.013(−0.104, 0.129)0.8300.013(−0.104, 0.129)0.8300.013(−0.104, 0.129)0.830
 50+ (ref)0.0000.0000.0000.000
Cause of crash
 Over speeding (ref)0.0000.0000.0000.000
 Negligence−0.068(−0.152, 0. 016)0.112−0.147(−0.211, −0.083)0.000−0.432(−0.522, −0.342)0.000−0.551(−0.664, −0.437)0.000
 Fatigue, wrong manoeuvre−0.085(−0.166, −0.005)0.038−0.163(−0.224, −0.103)0.000−0.568(−0.655, −0.482)0.000−0.759(−0.871, −0.648)0.000
 Alcohol−1.597(−1.756, −1.438)0.000−1.088(−1.266, −0.910)0.000−1.095(−1.385, −0.805)0.000−1.114(−1.482, −0.746)0.000
 Non-human factor−0.095(−0.218, 0. 028)0.131−0.297(−0.402, −0.193)0.000−0.288(−0.420, −0.156)0.000−0.138(−0.286, 0.0090.066
Type of road
 One-way (ref)0.0000.0000.0000.000
 Two-way0.058(−0.005, 0.121)0.069−0.022(−0.073, 0.029)0.393−0.170(−0.237, −0.102)0.000−0.230(−0.312, −0.149)0.000
Driver’s nationality
 Oman (ref)0.0000.0000.0000.000
 India−0.280(−0.385, −0.176)0.000−0.209(−0.302, –0.116)0.000−0.088(−0.214, 0.037)0.168−0.078(−0.230, 0.074)0.313
 Bangladesh0.314(0.184, 0.444)0.0000.314(0.184, 0.444)0.0000.314(0.184, 0.444)0.0000.314(0.184, 0.444)0.000
 Pakistan−0.309(−0.434, −0.184)0.000−0.154(−0.260, –0.047)0.0050.083(−0.051, 0.216)0.2240.190(0.031, 0.348)0.019
 Arab−0.096[−0.253, 0.061]0.229−0.005[−0.137, 0.126]0.9370.205(0.044, 0.366)0.0130.313(0.132, 0.494)0.001
 Other−0.221(−0.377, −0.065)0.006−0.221(−0.377, –0.065)0.006−0.221(−0.377 , −0.065)0.006−0.221(−0.377, −0.065)0.006
Governorate
 Muscat (ref)0.0000.0000.0000.000
 Musandam−0.148[−0.347, 0. 051)0.1460.024(−0.156, 0.204)0.7950.366(0.104, 0.628)0.006−0.220(−0.655, 0.215)0.321
 Dhofar2.141(2.011, 2.272)0.0002.141(2.011, 2.272)0.0002.141(2.011, 2.272)0.0002.141(2.011, 2.272)0.000
 Dakhliya0.413(0.327, 0.499)0.0000.295(0.227, 0.364)0.0000.750(0.653, 0.847)0.0000.819(0.700, 0.938)0.000
 Sharqia0.249(0.167, 0.332)0.0000.210(0.142, 0.278)0.0000.455(0.355, 0.556)0.0000.489(0.364, 0.614)0.000
 Batina0.645(0.554, 0.737)0.0000.944(0.877, 1.011)0.0001.431(1.346, 1.517)0.0001.514(1.412, 1.616)0.000
 Dhahira0.201(0.106, 0.296)0.0000.230(0.153, 0.308)0.0000.780(0.674, 0.886)0.0000.838(0.709, 0.967)0.000
 Wusta1.889(1.505, 2.272)0.0001.787(1.567, 2.008)0.0002.349(2.152, 2.545)0.0002.593(2.388, 2.798)0.000
Constant0.232(0.108, 0.356)0.000−0.785(−0.895, –0.675)0.000−2.148(−2.289, −2.007)0.000−2.661(−2.826, −2.496)0.000
No. of vehicles involved
 Single (ref)0.0000.0000.0000.000
 Multiple0.899(0.833, 0.966)0.000−0.028(−0.077, 0.022)0.272−0.053(−0.119, 0.012)0.112−0.027(−0.106, 0.053)0.510
Type of vehicle
 Saloon (ref)0.0000.0000.0000.000
 Four-wheel0.014(−0.071, 0.100)0.7420.178(0.109, 0.246)0.0000.290(0.203, 0.378)0.0000.350(0.248, 0.452)0.000
 Pickup0.025(−0.066, 0.117)0.5900.186(0.113, 0.259)0.0000.110(0.015, 0.205)0.0230.094(−0.020, 0.209)0.107
 Bus0.400(0.276, 0.525)0.0000.400(0.276, 0.525)0.0000.400(0.276, 0.525)0.0000.400(0.276, 0.525)0.000
 Heavy vehicle0.114(0.021, 0.207)0.0160.392(0.318, 0.465)0.0000.319(0.225, 0.412)0.0000.265(0.151, 0.379)0.000
Day of the crash
 Weekday (ref)0.0000.0000.0000.000
 Weekend0.108(0.048, 0.168)0.0000.053(0.005, 0.100)0.0300.087(0.024, 0.149)0.0060.153(0.079, 0.227)0.000
Month of crash
 January–March0.048(−0.004, 0.100)0.0720.048(−0.004, 0.100)0.0720.048(−0.004, 0.100)0.0720.048(−0.004, 0.100)0.072
 April–June (ref)0.0000.0000.0000.000
 July–September0.121(0.068, 0.174)0.0000.121(0.068, 0.174)0.0000.121(0.068, 0.174)0.0000.121(0.068, 0.174)0.000
 October–December0.147(0.092, 0.203)0.0000.147(0.092, 0.203)0.0000.147(0.092, 0.203)0.0000.147(0.092, 0.203)0.000
Year of crash
 2010 (ref)0.0000.0000.0000.000
 20110.486(0.406, 0.566)0.0000.208(0.141, 0.275)0.0000.214(0.126, 0.303)0.0000.185(0.076, 0.295)0.001
 20120.411(0.332, 0.491)0.0000.034(−0.032, 0.101)0.3090.067(−0.023, 0.156)0.1430.144(0.036, 0.252)0.009
 20130.417(0.337, 0.498)0.0000.059(−0.008, 0.126)0.0860.170(−0.074, 0.108)0.7170.058(−0.053, 0.170)0.303
 20140.900(0.799, 1.001)0.0000.348(0.274, 0. 423)0.0000.226(0.127, 0.324)0.0000.209(0.089, 0.330)0.001
  • Number of observations: 35 785; Log-likelihood: -−48 569.

  • RTIs, road traffic injuries.