The Preventive Effect of Head Injury by Helmet Type in Motorcycle Crashes: A Rural Korean Single-Center Observational Study

Table 5

Multiple linear regression analysis of injury severity score.

		95% confidence intervals		value
		Lower	Upper
Helmet type
Unhelmeted	Reference
Full face helmet	−2.169	−3.251	−1.088	<0.001
Open face helmet	−2.008	−3.282	−0.734	0.002
Half coverage helmet	−1.204	−2.590	0.182	0.089
Sex
Male	Reference
Female	−0.351	−1.685	0.982	0.605
Age	0.118	0.099	0.137	<0.001
Rider role
Passenger	Reference
Driver	1.261	−0.389	2.911	0.134
Riding speed at the crash (Km/h)	0.104	0.082	0.126	<0.001
Alcohol consumption
No	Reference
Yes	1.343	0.011	2.676	0.048
Mechanism of crash
MV collision with MC	Reference
MC collision with stationary obstacle	1.129	−0.609	2.866	0.203
No object	−0.692	−1.907	0.523	0.264
MC collision with moving obstacle	0.301	−0.789	1.390	0.589

MV: motor vehicle; MC: motorcycle.
A multiple linear regression analysis was performed based on helmet type, sex, age, riding speed, alcohol consumption, occupant role, and mechanism of crash.