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Table 4 Distribution of cases and controls according to history

From: Effect of wearing a helmet on the occurrence of head injuries in motorcycle riders in Benin: a case-control study

Variables

Head injuries (% or Mean ± sd)

p-value

Yes (n = 242)

No (n = 484)

Medical history

  

0.003

 Yes

11.2

19.8

 

 No

88.8

80.2

 

History of traffic crashes

  

0.327

 Yes

39.3

35.3

 

 No

60.7

64.7

 

Sleeping pill consumption

  

1.000

 Yes

2.9

2.9

 

 No

97.1

97.1

 

Consumption of stimulants/doping substances

  

0.657

 Yes

5.4

6.2

 

 No

94.6

93.8

 

Consumption of alcoholic beverages

  

0.503

 Yes

65.3

67.8

 

 No

34.7

32.2

 

Tobacco consumption

  

0.623

 Yes

10.7

12.0

 

 No

89.3

88.0

 

 Motorcycle riding experience (years)

15.7 (10.3)

16.8 (10.2)

0.177