The researchers believed the data might even be conservative, since they can’t count cases where the type of scooter wasn’t clear. Also, some riders might have decided against going to the hospital despite their injuries.

While the scientists didn’t give a specific explanation, they argued that oversight was “largely absent” when it came to dictating the use of helmets and where people can ride. We’d add that the very natures of e-scooters and their services increase risks: you’re putting around on two wheels at relatively high speeds in densely-packed urban areas.

E-scooter makers and services have also taken some flak. They have launched safety campaigns, but it’s not clear that they’ve done enough when it’s still all too common to see people riding without helmets or otherwise taking unnecessary risks. If the injury rate is going to decline, it might require the work of everyone involved.