Original sentence: <ref name=nakahara>.In one study that examined injuries presenting to the ER pre- and post-selt belt law introduction, it was found that 40% more escaped injury and 35% more escaped mild and moderate injuries.In studies that adjusted appropriately for increased traffic, and other factors such as age, a reduction of morbidity and mortality due to seat belt use has been demonstrated.It is generally accepted that, in comparing like-for-like accidents, a vehicle occupant wearing a properly fitted seat belt has a significantly lower chance of death and serious injury.Observational studies of car crash morbidity and mortality, experiments using both crash test dummies and human cadavers indicate that wearing seat belts provide a reduced risk of death and injury in the majority of car crashes.One large observation studying using, US data, showed that the odds ratio of crash survival is 0.46 with a three-point belt, when compared with no belt.Some have proposed that the number of deaths was influenced by the development of risk compensation, which says that drivers adjust their behaviour in response to the increased sense of personal safety wearing a seat belt provides.The effects of seat belt laws are disputed by some, stemming from observations that road fatalities due to passage of a seat belt law, often, did not decrease
Edited sentence: Hospital based studies  of car accident victims, experiments using both crash test dummies and actual human cadavers have indicated that wearing seat belts should provide a reduced risk of death and injury in many types of car crashes.It is also possible that the types of injury modelled in the trials were only a subset of potential serious injuries — for example, oblique impacts may produce twisting forces on the head leading to diffuse axonal injury, a particularly serious type of brain injury.It is generally accepted that, in comparing like-for-like accidents, a vehicle occupant wearing a properly fitted seat belt has a significantly lower chance of death or serious injury.The effects of such laws are disputed, stemming from the observed fact that no country is able to demonstrate a reduction in road fatalities due to passage of a seat belt law, though deaths have in some cases been migrated from drivers to other road users.The issue of seat belt legislation has been a source of some controversy.This has influenced the development of risk compensation theory, which says that drivers adjust their behaviour in response to the increased sense of personal safety wearing a seat belt provides