Two thirds of doorstaff at pubs and clubs have been subject to violent attacks.
That's according to a survey of 452 door supervisors for research commissioned by the Security Industry Authority (SIA) in a report on the state of the sector.
The survey also found 90% of those who had worked in the sector more than five years said they'd be attacked either physically or verbally.
The SIA plans to carry out research into violence directed at doorstaff "and their ability to deal with it". It follows the introduction of a physical intervention requirement for new staff.
Elsewhere, the report highlights benefits that have come about from the SIA licensing regime, which was introduced in 2004.
Among doorstaff, this included improved career opportunities and job skills; better relationships with the police; increased chances of gaining more responsibility in future; more ability and confidence to do their job.
A survey of 95 doorstaff suppliers also noted benefits including staff being more able to deal with security threats and insurance benefits.
Both noted improved public perceptions of the sector and lower criminality, plus greater public trust, due to criminal record checks.
SIA chief executive Bill Butler said: "The results show that, although we can still improve, overall, the industry believes that SIA licensing has had a positive impact.
"What is very worrying is the unacceptable level of violence reported by security operatives and we have already begun further work into this area.
"While there are some areas the SIA cannot influence, pay and conditions for example, we have improved efficiency and customer services to support those in the industry as they drive forward professionalism and best practice."
