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Comparison 1 Motorcycle helmet versus no helmet, Outcome 1 Death (not adjusted).
Figures and Tables -
Analysis 1.1

Comparison 1 Motorcycle helmet versus no helmet, Outcome 1 Death (not adjusted).

Comparison 1 Motorcycle helmet versus no helmet, Outcome 2 Head Injury (adjusted).
Figures and Tables -
Analysis 1.2

Comparison 1 Motorcycle helmet versus no helmet, Outcome 2 Head Injury (adjusted).

Comparison 1 Motorcycle helmet versus no helmet, Outcome 3 Head Injury (not adjusted).
Figures and Tables -
Analysis 1.3

Comparison 1 Motorcycle helmet versus no helmet, Outcome 3 Head Injury (not adjusted).

Comparison 1 Motorcycle helmet versus no helmet, Outcome 4 Neck Injury (not adjusted).
Figures and Tables -
Analysis 1.4

Comparison 1 Motorcycle helmet versus no helmet, Outcome 4 Neck Injury (not adjusted).

Comparison 1 Motorcycle helmet versus no helmet, Outcome 5 Facial Injury (not adjusted).
Figures and Tables -
Analysis 1.5

Comparison 1 Motorcycle helmet versus no helmet, Outcome 5 Facial Injury (not adjusted).

Comparison 1. Motorcycle helmet versus no helmet

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Death (not adjusted) Show forest plot

15

13260

Odds Ratio (M‐H, Random, 95% CI)

0.64 [0.52, 0.80]

2 Head Injury (adjusted) Show forest plot

5

Adjusted Odds Ratio (Random, 95% CI)

0.28 [0.23, 0.35]

2.1 Case‐control studies

2

Adjusted Odds Ratio (Random, 95% CI)

0.32 [0.20, 0.51]

2.2 Cross‐sectional studies

3

Adjusted Odds Ratio (Random, 95% CI)

0.27 [0.21, 0.35]

3 Head Injury (not adjusted) Show forest plot

17

16859

Odds Ratio (M‐H, Random, 95% CI)

0.38 [0.35, 0.41]

4 Neck Injury (not adjusted) Show forest plot

11

4334

Odds Ratio (M‐H, Random, 95% CI)

0.86 [0.64, 1.15]

5 Facial Injury (not adjusted) Show forest plot

7

8570

Odds Ratio (M‐H, Random, 95% CI)

0.42 [0.25, 0.69]

Figures and Tables -
Comparison 1. Motorcycle helmet versus no helmet