National Statistical Institute

Labour Force Statistics Department

Tsveta Kostova-Sevastiyanova

Head of department

2, P.Volov str., Sofia 1038

[email protected]

(+3592) 9857 619

Main results from the Labour force survey ad-hoc module on accidents at work and other work-related health problems.

The Labour Force Survey is a sample statistical survey carried out through households. The main purpose of the survey is to provide data on labour status of population aged 15 years and over and for the main characteristics of employed, unemployed and persons out of labour force in the Republic of Bulgaria. In 2020 an ad-hoc module on accidents at work and other work-related health problems was incorporated in the regular Labour force survey.

The classifications applied in the Labour force survey are harmonised with the international classifications in terms of economic activities, occupations, educational attainment. The main classifications used are the following:

• International Standard Classification of Education, 2011 version (ISCED 2011);
• Classification of Economic Activities (CEA-2008, for international use NACE.BG 2008) - since 2008;
• National Classification of Occupations and Duties-2005 (NCOD-2005) (1st digit - occupational class), comparable to the International Standard Classification of Occupations - ISCO ’88 - until 2010;
• National Classification of Occupations and Duties-2011 (NCOD-2011) (1st digit - occupational class), comparable to the International Standard Classification of Occupations - ISCO’08 - since 1 January 2011; International classification of professional status - ICSE-93;
• Classification of Territorial Units for Statistical Purposes in Bulgaria - NUTS.

All persons aged 15 years and over living in the selected non-institutional households are covered by the Labour force survey. The target population for the ad-hoc module "Accidents at work and other work-related health problems" consists of persons aged 15 years and over who have worked during the reference week and of persons aged 15 - 74 who have worked in the past but were not employed during the reference week. 

The Labour Force Survey provides estimates of the main characteristics of labour market as employment, unemployment, inactivity, occupations, economic activities, working time and other, as well as social-demographic characteristics as sex, age, place of residence (urban/rural), education etc.

The main definitions applied in the survey are in accordance with the recommendation of International Labour Organisation and EU legislation.

The results from the ad-hoc module "Accidents at work and other work-related health problems" allows to estimate:

• the number of accidents occurred at work leading to injuries;
• the number of people having health problems caused or made worse by work;
• the number of people exposed to risk factors affecting their physical and mental health;
• the  types of accidents, health problems and risk factors occurred;
• the impact in terms of lost days or disability;

the socio-demographic and labour market characteristics of persons affected.

Persons.

Total population usually residing in Bulgaria, except persons living in collective households. The ad-hoc module "Accidents at work and other work-related health problems" refers to population of persons aged 15 years and over who have worked during the reference week and of persons aged 15 - 74 who have worked in the past but were not employed during the reference week.

The whole territory of Republic of Bulgaria.

2020

Not applicable.

Ad-hoc module integrated with the Labour force survey.

Once.

Data for the ad-hoc module "Accidents at work and other work-related health problems" are collected using a paper questionnaire by conducting a personal interview with persons from the selected households immediately after the interview on the main labour force survey.

Plausibility checks are performed during the data entry. Additional consistency checks are carried out before publishing of data.

The completed questionnaires are coded (for economic activity, occupation, place of work, field of education etc.) and entered into computer in NSI regional offices. Data files are sent to NSI, where additional control and weighting is doing. Data are aggregated by different variables (characteristics), tabulated and disseminated.

Ensuring the quality of Labour Force Survey and its modules is according to the policy and Quality Management Programme of NSI. NSI follows the Action plan for implementation of Recommendation of Eurostat Task Force for quality improvement of Labour Force Survey. 

Quality report on the Labour Force Survey is prepared each year. Quality report on the 2020 ad-hoc module on accidents at work and other work-related health problems is also prepared in line with Eurostat requirements.

The main users of LFS statistical data are:

• International organisations:

-          European Commission - DG Employment and other Directorates

-          Eurostat - Labour Market unit and other units

-          European Central Bank

-          OECD

-          International Labour Organisation

-          UNESCO

-          UNICEF

• National users:

-          Ministries and State agencies

-          Bulgarian National Bank

-          Trade Unions

-          Employers’ organisations

-          Non-governmental organisations

-          Research institutions

Companies, agencies - for own marketing researches and consultancy activities.

Not available.

The ad-hoc module "Accidents at work and other work-related health problems" covers all compulsory variables according Commission Implementing Regulation (EU) 2018/1709 of 13 November 2018 specifying the technical characteristics of the 2020 ad hoc module on accidents at work and other work-related health problems as regards the labour force sample survey pursuant to Council Regulation (EC) No 577/98 (Text with EEA relevance.)

The sample used for the Labour Force Survey is a two-stage stratified cluster sample which includes quarterly about 19.5 thousand households (representing about 0.65% sampling rate). The ad-hoc module on accidents at work and other work-related health problems carried out over a part (25%) of LFS sample in each quarter and consisted of the households from the third wave.  Due to the sampling approach used in the labour force survey, the estimation of the parameters obtained from the labour force survey could vary from those in the population due to sampling  errors, errors due to non-response, errors in registration or processing etc.

Coefficients of variation (relative standard errors), and confidence intervals (i.e. the range of values that 95% of times would capture the true value in the population) are calculated for assessment of stochastic reliability of the estimates for main indicators.

The non-response rate for the ad-hoc module “Accidents at work and other work-related health problems” is 1.0% (from persons responded in regular LFS).

Not applicable.

Revisions of previously released data are usually not performed. By exception, revisions may happen after new estimates of population from a population census became available.

Not applied for the 2020 ad-hoc module.

The main results from the LFS ad-hoc modules are published about 6 months after the reference year.

The main results from the ad-hoc module "Accidents at work and other work-related health problems" are presented on 16 July 2021.

Comparability across EU Member States is considered high due to use of harmonised concepts, variables, definitions and classifications.

Not applicable.

Not available.

Some of the totals (rows and columns) in tables could slightly differ from the sum of the components because of the rounding of figures.

Not applicable.

Not applicable.

The main results from the ad-hoc module "Accidents at work and other work-related health problems" are available for all users at the NSI website section “Labour Market”, Labour Force Survey: http://www.nsi.bg/

Individual anonymous micro-data could be provided for scientific research purposes by individual request according to the Regulation of submission of anonymous individual data for scientific and research purposes.

An information service could be provided by request, according to the Rules for Dissemination of Statistical Information Products and Services.

• Methodology of Labour force survey:

 https://www.nsi.bg/sites/default/files/files/metadata/LFS_Methodology_EN.pdf

• Questionnaire for the ad-hoc module "Accidents at work and other work-related health problems";
• Interviewers’ instructions for the ad-hoc module "Accidents at work and other work-related health problems";
• Eurostat's Explanatory notes for the ad hoc module "Accidents at work and other work-related health problems" variables.

Not published.

The average duration of interview on the ad-hoc module is about 10 minutes.

• Law on Statistics;
• Regulation (ЕC) № 223/2009 of the European Parliament and of the Council of 11 March 2009 on European statistics (provision 24 and Article 20 (4)) (ОJ L 87, p. 164), stipulates the necessity to establish common principles and guidelines ensuring the confidentiality of data used for the production of European statistics and the access to those confidential data with due account for technical developments and the requirements of users in a democratic society.

Individual anonymous data provided for the purposes of scientific research do not consist any administrative data as personal information and address and do not allow direct identification. Additional aggregation of data is performed for some of the variables.

In accordance with Article 25 of the Law on Statistics Individual data are not published. Dissemination of individual data is possible only in accordance with Article 26 of the Law on Statistics.