The Rugby World Cup brought a spike in workload at Auckland City Hospital's emergency department, a NZ Medical Journal report says.
The department saw 7419 patients during the 2011 tournament, an 8 per cent increase in overall adult emergency department activity.
Several "dramatic spikes" included the opening ceremony on September 9, when larger-than-anticipated crowds turned out in the city centre fan zone and there were difficulties due to a railway incident and a major road traffic accident.
A second spike happened around the RWC final between the All Blacks and France on October 23, which lasted several hours and some patients had to be diverted to other departments.
Most of the problems were alcohol related; such cases were more prominent at weekends (15 per cent of cases) and comprised half of all attendances in the four hours after the final.