| Data Series | Revision arrangements |
|---|---|
| Annual reported injury statistics (RIDDOR) | At first release, RIDDOR data are marked as provisional. The following year, data are finalised and no further revisions made (unless there is a methodological improvement or errors are found) |
| Annual reported injury rates (RIDDOR) | The ONS Workforce in Employment (WiE) series and the BRES survey are used as denominators for Riddor injury rates. WiE is routinely revised each December taking on new benchmarks. These revisions typically go back three years and will be incorporated into the Riddor injury rates at the time of the next scheduled release of injury numbers. Occasionally, more historical revisions are made to the employment series. When these revisions occur, HSE statisticians will make a judgement as to whether they materially impact on the Riddor injury rate series and decide whether to incorporate them into the rates. |
| Mesothelioma deaths | Deaths from Mesothelioma are marked as provisional for two years and will be revised due to late registrations to ensure the series is as complete and consistent as possible. |
| Enforcement data | At first release, enforcement data (notices and prosecutions) are marked as provisional. The following year, data are finalised and no further revisions made. (unless errors are found) |
| Quarterly, in-year reported injury (Riddor) data | This series is a live snap-shot of the administrative data system and as such quarterly figures will be revised during the year up until the time that the annual figures are finalised. Seasonal factors will be reviewed annually and the seasonally adjusted back-series will be revised to accommodate this review. Users will be notified when these revisions are made and any substantial changes will be highlighted. |
| THOR | THOR records reports of cases of work-related illness from members of the THOR surveillance network. There is a system of regular checks with reporters throughout the year, and an annual process of completeness and logic checks before the data are released. Occasionally, specific analyses can identify data errors in individual THOR cases after initial publication. When found, these are corrected immediately in the THOR database, and at the next annual update in the HSE published tables. |
| LFS | HSE follows LFS revision practice to the extent that it materially affects estimates from the health and safety questions. When there is the potential impact, an assessment of the scale is made and a judgement about the need for revision is made. |
