I guess I wasn’t clear: My entry wasn’t about the usefulness of motorcycle helmets. It was about inadequate or incorrect record keeping. It was about GIGO (Garbage In Garbage Out).

Attempting to make conclusions based on inadequate, incomplete or compromised information will ruin one’s statistics every time.

I wanted to and did point out that cause-of-death documents involving TBIs are likely to be unreliable. They would be equally unreliable if the victims studied had been only those who died after falling out of tree houses, downstairs or off skateboards. The problem is that the nature of the reporting can a make set of data less than useful.

Joe