Occupational safety and health at work are vital components of decent work. Statistics on occupational injuries are essential to assess the extent to which workers are protected from work-related hazards and risks. In this regard, indicators on occupational injuries are complementary to those on labour inspection, also included in ILOSTAT.
Given the usefulness of occupational injuries statistics in conveying information on the conditions of workers, this indicator was included as one of the indicators to measure progress towards the achievement of the Sustainable Development Goals (SDG), under Goal 8 (Promote sustained, inclusive and sustainable economic growth, full and productive employment and decent work for all).1SDG indicator 8.8.1 refers to the frequency rates of fatal and non-fatal occupational injuries, by sex and migrant status. For the official list of SDG indicators, see here
ILOSTAT presents statistics on both fatal occupational injuries and non-fatal occupational injuries. In order to assess the work-related risks to which workers are exposed, it is preferable not to look at the gross number of occupational injuries, but rather to present them as a ratio. This is why ILOSTAT features statistics on the number of cases of fatal and non-fatal occupational injuries per 100’000 workers, disaggregated by sex and migrant status and also by economic activity, compiled from national sources. For users interested in more detailed statistics, ILOSTAT also contains statistics on days lost due to occupational injuries by sex and migrant status and by economic activity.
The manual provides valuable advice to those involved in the production of statistics on occupational injuries, using sources other than the traditional notification systems. Its extensive chapters on concepts and definitions, as well as types of data and classifications, will serve as a reference to both producers and users of these statistics.
Concepts and definitions
An occupational injury is defined as any personal injury, disease or death resulting from an occupational accident. An occupational injury is therefore distinct from an occupational disease, which is a disease contracted as a result of an exposure over a period of time to risk factors arising from work activity.
An occupational accident is an unexpected and unplanned occurrence, including acts of violence, arising out of or in connection with work, which results in one or more workers incurring a personal injury, disease or death. A case of occupational injury is the case of one worker incurring an occupational injury as a result of one occupational accident. An occupational injury could be fatal (as a result of occupational accidents and where death occurred within one year of the day of the accident) or non-fatal, with lost work time.
Incapacity for work is the inability of the victim, due to an occupational injury, to perform the normal duties of work in the job or post occupied at the time of the occupational accident. Incapacity can be permanent or temporary. Cases of permanent incapacity for work are cases of occupational injury where the persons injured were never again able to perform the normal duties of work in the job or post occupied at the time of the occupational accident. Cases of temporary incapacity are cases of occupational injury where the workers injured were unable to work from the day after the day of the accident, but were later able to perform again the normal duties of work in the job or post occupied at the time of the occupational accident (within a period of one year from the day of the accident).
The workers in the particular group under consideration and covered by the source of the statistics of occupational injuries are known as the workers in the reference group. In the case of a notification system, it is the number of workers in, for example, the establishments or selected economic activities covered by the system as set out in the relevant legislation or regulations.
Days lost due to temporary incapacity refers to the total number of calendar days during which those persons temporarily incapacitated were unable to work, excluding the day of the accident, up to a maximum of one year. Temporary absences from work of less than one day for medical treatment are not included.2For more detailed information, please refer to the Resolution concerning statistics of occupational injuries (resulting from occupational accidents), adopted by the 16th International Conference of Labour Statisticians (October 1998)
Method of computation
Given that relative measures are easier to interpret and favour comparability between countries, activities and over time, ILOSTAT presents statistics on the occupational injuries incidence rate, calculated as follows:
Fatal occupational injuries incidence rate =
Number of new cases of fatal occupational injuries during the reference period x 100’000
Number of workers in the reference group
Non-fatal occupational injuries incidence rate =
Number of new cases of non-fatal occupational injuries during the reference period x 100’000
Number of workers in the reference group
Statistics on occupational injuries could come from a variety of sources, including various types of administrative records (insurance records, labour inspection records, records kept by the labour ministry or the relevant social security institution), establishment surveys and household surveys.
The recommended data sources for occupational injuries statistics are national systems for the notification of occupational injuries (such as labour inspection records and annual reports, insurance and compensation records, and death registers), supplemented by household surveys (especially in order to cover informal sector enterprises and the self-employed) and/or establishment surveys.
It is worth noting that fatal and non-fatal occupational injuries tend to be notified to and compensated by different agencies, so when using statistics from administrative records, statistics on fatal and non-fatal occupational injuries would very likely come from different records. This means that the sources may have different coverage, and thus fatal and non-fatal occupational injuries, even though very complementary, may not be strictly comparable.
Interpretation and use of the indicator
Data on occupational injuries are essential for planning preventive measures. The role of the indicators described in this document is to identify important areas to which attention should be paid. In order to be able to design more targeted prevention mechanisms and related policies, it is recommended to disaggregate and analyse this indicator by sex, occupation, economic activity, or any combination of these. For instance, workers in occupations and activities of highest risk can be targeted more effectively for inspection visits, development of regulations and procedures, and also for safety campaigns.
There may be problems of under-reporting of fatal occupational injuries, and proper systems should be put in place to ensure the production of high quality data. Under-reporting is thought to be present in countries at all levels of development, but may be particularly problematic in developing countries.
Because data quality issues may be present, it may be more relevant to analyse indicator trends rather than levels. When measured over a period of time, the data can reveal progress or deterioration in occupational safety and health, and thus point to the effectiveness of prevention measures. Indicators on occupational injuries are volatile and large annual fluctuations may occur due to unexpected but significant accidents or national calamities. The underlying trend should therefore be analysed.
The variety of possible sources of data on occupational injuries, which includes administrative records, establishment surveys and household surveys (such as labour force surveys), hinders the comparability of the data across countries, since each type of source provides information on different specific concepts.
Even data coming from administrative records are not strictly comparable, since there are numerous types of records that follow different rules and are maintained by different agencies. Two main sources of data are records of notifications by employers to the competent authority and insurance records of the authority compensating the victims. These two would clearly yield different results, since it is possible that not all injuries that are compensated are reported by the employer and vice versa. It is also possible that these records have a different a geographical coverage or that they cover different economic activities. Ideally, all records pertaining to the same topic kept by different agencies should be linked and/or consolidated (using unique unit identifiers, for example) so that the statistics are truly comprehensive and representative of the country as a whole.
When statistics come from an establishment survey, the results would be closer to those from records of notifications made by employers, since it is also the employer who provides the information. However, establishment surveys tend not to cover the informal sector, nor establishments of a very small size. When statistics come from a household survey (such as a labour force survey), their reliability depends on the accuracy of the respondents. However, if enough questions are used about accidents and injuries to ensure the accuracy of the information, household surveys can be an effective means of obtaining data cross-tabulated by various disaggregations.3For more information on deriving occupational injuries statistics from household and establishment surveys, refer to ILO: “Occupational injuries statistics from household surveys and establishment surveys” (ILO, Geneva, 2012)
It is important to note that there might be a difference in units from source to source: insurance records and notifications records will most likely give the number of cases of injuries (if one worker had suffered from several injuries throughout the year, he/she would appear as many times as the number of injuries suffered), whereas the information from household surveys would refer to the number of persons having suffered from at least one injury (unless the survey reliably collects information on how many injuries each person suffered and the results are summed up).