evidence: Suicide deaths in Northern Ireland are defined using the UK National Statistics definition which includes deaths from Self-inflicted Injury for persons aged 10 and over as well as Events of Undetermined Intent for those aged 15 and over. The codes used to define the suicide figures are shown below: [...] The 2019 suicide total (provisional figure of 209 and later finalised at 197) showed a significant fall on the 2018 total of 307. The decrease was primarily driven by improvements in the statistical collection and collation process, and in particular the re-classification of ‘drug related’ deaths from being undetermined (and within the suicide definition) to accidental (and outside of the suicide definition). In light of this, NISRA, working with the Coroners Service, began to review and revise individual undetermined drug related deaths from 2015 to 2018. This review was later extended to include 2020 data as well as some non-drug related cases from 2015-2019. This review is now complete and finalised figures for years 2015 – 2020 have been published. Full details of the issues prompting the review and the impact of the revisions on the previously published time series are available in the May 2022 review report. This review marks a major revision to this important statistical series and has had a significant impact on the existing NI narrative in relation to suicide rates compared with other nations. [...] The User Guide to Suicide Statistics in Northern Ireland contains important information' on: quality characteristics, strengths and limitations of the data, methods used to provide suicide series and changes to suicide series.