Figure 5: Number of deaths involving new psychoactive substances by registration year and occurrence year, 1993 to 2013
England and Wales
Source: Office for National Statistics
Cause of death was defined using the International Classification of Diseases, Ninth Revision (ICD-9) for the years 1993 to 2000 and Tenth Revision (ICD-10) from 2001 onwards (see Background note 4). Deaths were included where the underlying cause was drug related and one or more new psychoactive substances were mentioned on the death certificate.
Figure 5 only includes deaths that were registered by 31 December 2014. Due to the length of time it takes to complete a coroner’s inquest, it can take months or even years for a drug-related death to be registered, so figures for deaths occurring in 2013 will be an underestimate. See the section on 'Impact of registration delays on drug-related deaths' for more details.
Figures for England and Wales include deaths of non-residents.