Aim: To review the impact of the passing of legislation enforcing that children wear cycle helmets (Maryland, USA).
Method: Natural experiment.
Sample: 7000+ children aged 9-15 from 47 schools within three counties (1 with the law and 2 control counties).
Procedure: A questionnaire (Likhert scale) asked about helmet ownership and use, and awareness of the law. Parents were asked to help and their consent was gained.
Findings: In the county with the law passed, the usage of cycle helmets had increased greatly, especially amongst children aware of the law, whereas the control counties had no significant increase.
Conclusion: Passing legislation is a very effective way of changing behaviour and has more effect than education campaigns alone. However legislation can never be the sole method of health promotion (people still drink and drive, despite it's illegality).
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