Figure 1: Age-standardised mortality rates for deaths related to drug poisoning and drug misuse, by sex, deaths registered in 1993–2013
England and Wales
Source: Office for National Statistics
Age-standardised mortality rates per 1 million population have been revised using the the 2013 European Standard Population. Age-standardised rates are used to allow comparison between populations which may contain different proportions of people of different ages. More details can be found in the ‘Methodological changes’ section of this bulletin.
The drug misuse indicator was revised in 2014 with 20 new substances. Therefore figures for drug misuse may not match those previously published. A full back series has been revised to allow for comparability.
The lower and upper confidence limits have been provided. These form a confidence interval, which is a measure of the statistical precision of an estimate and shows the range of uncertainty around the estimated figure. Calculations based on small numbers of events are often subject to random fluctuations. As a general rule, if the confidence interval around one figure overlaps with the interval around another, we cannot say with certainty that there is more than a chance difference between the two figures.
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. The underlying cause of death codes used to select 'all drug poisonings' and 'drug misuse' deaths are shown in Background note 4. Drug misuse as defined by the current headline indicator shown in Background note 5. Deaths from drug misuse are included in the figures for all drug poisoning.
Figures for England and Wales include deaths of non-residents.
Figures are for deaths registered, rather than deaths occurring in each calendar year. 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. More details can be found in the ‘Impact of registration delays on drug-related deaths’ section below.