Originally Posted by yugo campione

The major issue with using studies like this is that the falls by cyclist in which their head hits the ground, then they stand up and shake their head and say "whoa, that hurt", then get right back up on their bike and ride away, all without ever going in to see a doctor, are not included. Now you may say, "those should not be included in the study because there was not significant head trauma" and I would respond, "well...that's the point, isn't it?".