I think "use" or "reliance" has to include what I'll call the "compliance factor". Do seatbelts prevent injury? In my case, yes. I never get behind the wheel without putting on my seatbelt. Even to move a parked car to another spot in a lot. I have a high compliance factor. | I think "use" or "reliance" has to include what I'll call the "compliance factor". Do seatbelts prevent injury? In my case, yes. I never get behind the wheel without putting on my seatbelt. Even to move a parked car to another spot in a lot. I have a high compliance factor. |