European Health Interview Survey (EHIS)

Reference Metadata in Euro SDMX Metadata Structure (ESMS)

Compiling agency: Eurostat, the statistical office of the European Union

Eurostat metadata
Reference metadata
1. Contact
2. Metadata update
3. Statistical presentation
4. Unit of measure
5. Reference Period
6. Institutional Mandate
7. Confidentiality
8. Release policy
9. Frequency of dissemination
10. Accessibility and clarity
11. Quality management
12. Relevance
13. Accuracy
14. Timeliness and punctuality
15. Coherence and comparability
16. Cost and Burden
17. Data revision
18. Statistical processing
19. Comment
Related Metadata
Annexes (including footnotes)

For any question on data and metadata, please contact: EUROPEAN STATISTICAL DATA SUPPORT


1. Contact Top
1.1. Contact organisation

Eurostat, the statistical office of the European Union

1.2. Contact organisation unit

F4: Income and living conditions; Quality of life

1.5. Contact mail address

2920 Luxembourg LUXEMBOURG

2. Metadata update Top
2.1. Metadata last certified 30/08/2016
2.2. Metadata last posted 30/08/2016
2.3. Metadata last update 30/08/2016

3. Statistical presentation Top
3.1. Data description

The European Health Interview Survey (EHIS) aims at measuring on a harmonised basis and with a high degree of comparability among MS the health status (including disability), health determinants (including environment) and use and limitations in access to health care services of the EU citizens.

The general coverage of the survey is the population aged 15 or over living in private households residing in the territory of the country.

EHIS was developed between 2003 and 2006. It consists of four modules on health status, health determinants, health care, and background variables.

The first wave of EHIS (EHIS wave 1 or EHIS round 2008) was conducted between 2006 and 2009 in 17 EU Member States as well as Switzerland and Turkey.

The second wave (EHIS wave 2 or EHIS round 2014) was conducted between 2013 and 2015 in all EU Member States, Iceland and Norway. Some other countries conducted their national health interview surveys using the second wave of EHIS questionnaire such as Turkey or Serbia.

EHIS includes the following topics:

Health status
This topic includes different dimensions of health status and health-related activity limitations:

  • General health status (Minimum European health module): self-perceived health, chronic morbidity and activity limitation
  • Disease-specific morbidity
  • Accidents and injuries
  • Health-related absenteeism from work
  • Physical and sensory functional limitations
  • Difficulties in personal care activities / activities of daily living (such as eating and washing) and help received/needed
  • Household activities / Instrumental activities of daily living (such as preparing meals and shopping) and help received/needed
  • Pain
  • Aspect of mental health (psychological distress and mental well-being in the first wave, depressive symptoms in the second wave)
  • Work-related health problems (only in the first wave).

Health care
This topic covers the use of different types of medicines and formal and informal health and social care services, which are complemented by data on health-related expenditure, and limitations in access to and satisfaction with health care services:

  • Hospitalisation (in-patient and day care)
  • Consultations with doctors and dentists
  • Visits to specific health professionals (such as physiotherapists or psychologists)
  • Use of home care and home help services
  • Use of medicines (prescribed and non-prescribed)
  • Healthcare preventive actions (such as influenza vaccination, breast examination, cervical smear test and blood tests)
  • Unmet needs for health care
  • Out-of-pocket payments for medical care (only in the first wave)
  • Satisfaction with services provided by healthcare providers (only in the first wave)
  • Visits to specific categories of alternative medicine practitioners (only in the first wave).

Health determinants
This topic includes various individual and environmental health determinants:

  • Height and weight
  • Physical activity
  • Consumption of fruits, vegetables and juice
  • Smoking behaviour and exposure to tobacco smoke
  • Alcohol consumption
  • Social support
  • Provision of informal care or assistance (only in the second wave)
  • Illicit drug use (only in the first wave)
  • Environment (home and workplace exposures, criminality exposure) (only in the first wave).

Background variables on demography and socio-economic status.

All indicators are expressed as percentages within the population and statistics are broken down by age and sex and one other dimension such as educational attainment level, income quintile group or labour status.

3.2. Classification system

EHIS results are produced in accordance with the relevant international classification systems:

  • The regional codes are those from the classification of territorial units for statistics (NUTS) and the corresponding statistical regions for the EFTA and candidate countries;
  • Educational attainment is compiled according to the 1997 version (for wave 1) and 2011 version (for wave 2) of the International standard classification of education (ISCED);
  • Occupation in employment uses the 2008 version of the International standard classification of occupations (ISCO-08);
  • The economic sector in employment is collected according to the section level (one letter) of the 2008 version of the statistical classification of economic activities in the European Community (NACE Rev. 2).
3.3. Coverage - sector

EHIS is a general population survey and health variables describe general population health, health determinants and access to health care services.

3.4. Statistical concepts and definitions

The following indicators based on EHIS wave 2 data are (or will soon be) disseminated:

Health status

Self-perceived health and well-being

  • Current depressive symptoms: Distribution of the population according to current depressive symptoms using modalities:

- Major depressive symptoms: if item MH1A or MH1B and five or more items of MH1A to MH1H score at least ‘more than half the days’
- Other depressive symptoms: if item MH1A or MH1B and two, three or four items of MH1A to MH1H score at least ‘more than half the days’
- Any depressive symptoms: if ‘major depressive symptoms’ or ‘other depressive symptoms’ are recorded.

  • Severity of bodily pain: Distribution of the population according to the severity of bodily pain using modalities 'None, Very mild, Mild, Moderate, Severe or Very severe'.

Functional and activity limitations

  • Physical and sensory functional limitations: Prevalence of physical and sensory functional limitations according to the severity using modalities 'None, Moderate, Severe (including not able at all)'. The indicator refers to the most severe limitation based on reporting on vision, hearing and walking.

Self-reported chronic morbidity

  • Persons reporting a chronic disease: Proportion of the population reporting a chronic condition in the past 12 months. Statistics on 15 diseases or chronic conditions are presented:

A. Asthma (allergic asthma included)

B. Chronic bronchitis, chronic obstructive pulmonary disease, emphysema

C. Myocardial infarction (heart attack) or chronic consequences of myocardial infarction

D. Coronary heart disease or angina pectoris

E. High blood pressure (hypertension)

F. Stroke (cerebral haemorrhage, cerebral thrombosis) or chronic consequences of stroke

G. Arthrosis (arthritis excluded)

H. Low back disorder or other chronic back defect

I. Neck disorder or other chronic neck defect

J. Diabetes

K. Allergy, such as rhinitis, hay fever, eye inflammation, dermatitis, food allergy or other allergy (allergic asthma excluded)

L. Cirrhosis of the liver

M. Urinary incontinence, problems in controlling the bladder

N. Kidney problems

O. Depression

Injuries from accidents

  • Persons reporting having had an accident: Proportion of people reporting to have had an accident during the past 12 months, which resulted in injury. Statistics on three types of accidents are presented: Road traffic accident, Home accident, Leisure accident.


Health determinants

Body mass index

  • Body mass index (BMI): Distribution of the population according to their body mass index (BMI). BMI is defined as the weight in kilos divided by the square of the height in meters. For dissemination purpose, the following modalities are used:

- Underweight: BMI less than 18.5
- Normal weight: BMI between 18.5 and less than 25
- Pre-obese: BMI between 25 and less than 30
- Obese: BMI equal or greater than 30
- Overweight: BMI equal or greater than 25 (Pre-obese + Obese)

Physical activity

  • Effort involved in performing work-related physical activity: Distribution of the population according to the intensity of work-related physical activity using modalities:

- Heavy (mostly heavy labour or physically demanding work),

- Moderate (mostly walking or tasks involving moderate physical effort),

- None or light (i.e. either not performing any working tasks or mostly sitting or standing)

  • Time spent on health-enhancing (non-work-related) aerobic physical activity: Distribution of the population according to the time spent on health-enhancing (non-work-related) aerobic physical activity (in minutes per week). Physical activities included are sports and cycling to get to and from places.

Consumption of fruits and vegetables

  • Daily consumption of fruit and vegetables: Distribution of the population according to the number of portions of fruit and vegetables consumed per day.
  • Frequency of fruit and vegetables consumption: Distribution of the population according to the frequency of consumption of fruit and vegetables.

Tobacco consumption

  • Smoking of tobacco products: Distribution of the population according to tobacco products smoking habits using modalities Daily smoker, Occasional smoker, Non-smoker and Current smoker (Daily + Occasional smoker).
  • Daily smokers of cigarettes: Proportion of people who smoke (manufactured and hand-rolled) cigarettes daily according to the level of cigarette smoking using modalities 'Less than 20 cigarettes per day', '20 or more cigarettes per day' and 'Total daily smokers of cigarettes'.

Alcohol consumption

  • Frequency of alcohol consumption: Distribution of the population according to the frequency of alcohol consumption using modalities 'Every day, Every week (but not daily), Every month (but not weekly), Less than once a month, Not in the last 12 months (Former drinkers), Never (Lifetime abstainers)'.
  • Hazardous alcohol consumption: Proportion of the population reporting to have had an average rate of consumption of more than 20 grams pure alcohol daily for women and more than 40 grams daily for men.
  • Frequency of heavy episodic drinking: Distribution of the population according to their frequency of heavy episodic drinking (which is ingesting more than 60g of pure ethanol on a single occasion) using modalities 'At least once a week, Every month (but not weekly), Less than once a month, Never or not in the last 12 months'.


Health care

Preventive services

  • Self-reported last breast examination by X-ray among women: Distribution of women population according to the last occurrence of mammography examination. Age group 50-69 is mostly used for policy purposes.
  • Self-reported last cervical smear test among women: Distribution of women population according to the last occurrence of cervical smear test. Age group 20-69 is mostly used for policy purposes.
  • Self-reported last faecal occult blood test: Distribution of the population according to the last occurrence of faecal occult blood test. Age group 50-74 is mostly used for policy purposes.
  • Self-reported vaccination against influenza: Percentage of the population vaccinated against flu during the past 12 months. Age group 65 or over is mostly used for policy purposes.

Medicine use

  • Self-reported use of prescribed medicines: Proportion of the population who used medicines prescribed by a doctor in the past 2 weeks.

EHIS uses the following main breakdowns for presenting statistics:

Sex: females, males.

Age: the age completed at the time of the interview. 10year age groups (15-24, 25-34, ..., 75+) are used by default for most indicators. In addition, other age groups varying among indicators are used.

Educational attainment level: the education attainment levels of individuals are classified according to the International Standard Classification of Education (ISCED) version of 1997 (wave 1) and version of 2011 (wave 2) and are grouped as follows:

  • Less than primary, primary and lower secondary education
  • Upper secondary and post-secondary non-tertiary
  • Tertiary education

Income quintile group: is computed on the basis of the total equivalised disposable income attributed to each member of the household (for more details on the definition, please consult EU-SILC reference metadata file).

The data (of each person) are ordered according to the value of the total equivalised disposable income. Four cut-point values (the so-called quintile cut-off points) of income, dividing the survey population into five groups equally represented by 20 % of individuals each, are found:

  • First quintile
  • Second quintile
  • Third quintile
  • Fourth quintile
  • Fifth quintile

The first quintile group represents 20 % of population with lowest income and the fifth quintile group 20 % of population with highest income.

Labour status: main perceived labour status using the following categories:

  • Employed persons
  • Unemployed persons
  • Retired persons
  • Other inactive persons
3.5. Statistical unit

The statistical unit is the individual.

3.6. Statistical population

All persons aged 15 years or over living in private households and residing in the territory of the country.

3.7. Reference area

EHIS wave 1 (2008 round): AT, BE, BG, CZ, CY, DE, EE, EL, ES, FR, HU, LV, MT, PL, RO, SI, SK and CH and TR. (Data not available and disseminated for CH.)

EHIS wave 2 (2014 round): EU-28 countries, Iceland and Norway. Countries not binded by EHIS regulation will be considered for dissemination later on.

Note: Results from EHIS wave 1 are temporarily disseminated under 'Historical data' but will be merged with EHIS wave 2 after conducting a feasibility study.

3.8. Coverage - Time

The first wave of EHIS was carried out in the years and countries indicated below:

  • 2006: Estonia and Austria
  • 2007: Slovenia and Switzerland
  • 2008: Belgium, Bulgaria, the Czech Republic, France, Cyprus, Latvia, Malta, Romania and Turkey
  • 2009: Germany, Greece, Spain, Hungary, Poland and Slovakia.

The second wave of EHIS was implemented as follows:

  • 2013: Belgium and the United Kingdom
  • 2014: Bulgaria, the Czech Republic, Estonia, Greece, Spain, France, Croatia, Italy, Cyprus, Latvia, Lithuania, Luxembourg, Hungary, Malta, Netherlands, Austria, Poland, Portugal, Romania, Slovenia, Slovakia, Finland and Sweden
  • 2015: Denmark, Germany, Ireland, Italy, Iceland and Norway.
3.9. Base period

Not applicable.

4. Unit of measure Top

All indicators are calculated in terms of percentages.

5. Reference Period Top

EHIS makes use of a variety of reference periods (the following refers to the second wave):

  • Current period of time: some variables on health status and most variables on health determinants refer to the current (typical) situation
  • One typical week: variables related to physical activity
  • Previous 2 weeks: variables related to medicine use and mental health
  • Previous 4 weeks: variables related to pain and frequency of consultations of health professionals
  • Previous 12 months: variables related to accidents and injuries, disease-specific morbidity, most variables on health care and alcohol consumption.

6. Institutional Mandate Top
6.1. Institutional Mandate - legal acts and other agreements

The first wave was conducted on the basis of a gentlemen’s agreement (in other words, without a legal obligation) established in the framework of Eurostat Working Group on "Public Health Statistics".

According to the Regulation 1338/2008 on Community statistics on public health and health and safety at work EHIS is to be conducted every five years. EHIS wave 2 was conducted in all EU Member States and in Iceland and Norway between 2013 and 2015 according to the Commision Regulation 141/2013 as regards statistics based on the European Health Interview Survey (EHIS).

6.2. Institutional Mandate - data sharing

Not applicable.

7. Confidentiality Top
7.1. Confidentiality - policy

Regulation (EC) No 223/2009 on European statistics (recital 24 and Article 20(4)) of 11 March 2009 (OJ L 87, p. 164), stipulates the need 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.

7.2. Confidentiality - data treatment

EHIS wave 1 microdata are available to researchers carrying out statistical analyses for scientific purposes. The microdata do not contain any administrative information such as names or addresses that would allow direct identification. In order to ensure high level of confidentiality, a set of anonymisation rules was applied, including dropping of some variables or grouping answer categories. For more details about access to microdata see:

EHIS wave 2 microdata are not currently available to researchers.

For the purposes of dissemination of aggregated data the following rules are applied:

  • An estimate should not be published if it is based on fewer than 20 sample observations or if the non-response for the item concerned exceeds 50%.
  • An estimate should be published with a flag "low reliability" if it is based on 20 to 49 sample observations or if non-response for the item concerned exceeds 20% and is lower or equal to 50%.
  • An estimate shall be published in the normal way when based on 50 or more sample observations and the item's non-response does not exceed 20%.

8. Release policy Top
8.1. Release calendar

There is no release calendar.

8.2. Release calendar access

Not applicable.

8.3. Release policy - user access

In line with the European Union legal framework and the European Statistics Code of Practice Eurostat disseminates European statistics on Eurostat's website (see item 10 - 'Dissemination format') respecting professional independence and in an objective, professional and transparent manner in which all users are treated equitably. The detailed arrangements are governed by the Eurostat protocol on impartial access to Eurostat data for users.

9. Frequency of dissemination Top

EHIS wave 1 was conducted in 19 European countries between 2006 and 2009. Data are disseminated for 18 countries: AT, BE, BG, CZ, CY, DE, EE, EL, ES, FR, HU, LV, MT, PL, RO, SI, SK and TR.

Note: Results from EHIS wave 1 are temporarily disseminated under 'Historical data' but will be merged with EHIS wave 2 after conducting a feasibility study.

EHIS wave 2 was conducted in all EU Member States and Iceland and Norway between 2013 and 2015. Other countries, for example Lichtenstein, Serbia, Switzerland and Turkey, used at least partly EHIS wave 2 methodology in their national surveys. Data have been gradually disseminated from the third quarter of 2016.

10. Accessibility and clarity Top
10.1. Dissemination format - News release

Not available.

10.2. Dissemination format - Publications

EHIS data are included in various health-oriented and cross-cutting Eurostat publications online publications: European social statistics, Health in the European Union – facts and figures and Disability statistics.

Statistical articles using data from the European health interview survey:

10.3. Dissemination format - online database

Please consult free data on-line at: under respective sections:

10.4. Dissemination format - microdata access

Due to the confidential character of the EHIS microdata, direct access to the anonymised data will be only provided by means of research contracts. Access is in principle restricted to universities, research institutes, national statistical institutes, central banks inside the EU, as well as to the European Central Bank. Individuals cannot be granted direct access. For more details about access to microdata see:

10.5. Dissemination format - other

Eurostat internet address:

10.6. Documentation on methodology

General description of EHIS methodology is described in the article European health interview survey - methodology.

Methodological guidelines as well as other relevant documents are available at:

10.7. Quality management - documentation

EHIS wave 1 - assessment

EHIS wave 2 assessment (not yet available).

11. Quality management Top
11.1. Quality assurance

EHIS aims at achieving an input standardisation. A model questionnaire (questions, answer categories, filters, etc.) as well as conceptual guidelines and rationales were prepared. Conceptual translation into all EU languages was requested. 

Recommendations on the questionnaire are complemented with guidelines on data collection methods and procesing of data.

Eurostat also applies consistency and integrity checks on the microdata so that minimum output quality standard is reached. In addition, data are accompanied with quality reports stating the accuracy, coherence and comparability of the data. See also the forthcoming annex on the quality reports.

11.2. Quality management - assessment

National surveys implementing the first wave of EHIS were conducted in different ways, for example in terms of the extent to which the common questionnaire was adapted and divergences from the standard coverage (reference population). Some of the practices are highlighted here.

In most cases the first wave of EHIS was conducted as a stand-alone survey, whereas in France and Germany it was integrated into existing health interview surveys. Germany, Estonia, France, Austria and Turkey excluded some parts of at least one of the four EHIS modules. In some countries a different sequence of questions was followed from that foreseen in the common questionnaire. The majority of questions which were added or modified in national questionnaires were related to socio-demographic questions such as employment and also changes to the list of chronic conditions. More information on the harmonisation of national questions with EHIS standard questionnaire for the first wave can be found in theComparison of EHIS source questions with national survey questions. In some cases modified questions were used in sections related to alcohol, drug consumption and health care services.

Countries used different ways of conducting the first wave of EHIS and performed differently according to various quality-related indicators, which could also have had an impact on results.

  • Target population: inclusion or exclusion of people living in institutions (such as homes for the elderly).
  • Various types of sampling frame were used (notably results of a population census, population registers, dwelling registers and telephone lists).
  • Conducting interviews with one or more persons in the household.
  • Modes of data collection: face-to-face interviews (paper and pen or computer assisted interviews) or telephone interviews, supplemented in just less than half of the national surveys by self-administered questionnaires.
  • Use of proxy respondents in cases when the intended interviewee could not answer and different reasons for the use of proxy interviews; and substitution of respondents.
  • Year when the survey was conducted (2006–10) and data collection period (varied from 1 to 12 months between countries).
  • Unit response rates are available for 13 national surveys (from the first wave of EHIS) and these ranged from 56 % to 89 %.

More information on data quality can be found in asynthesis of national quality reports for the first wave.

Assessment of EHIS wave 2 is not yet available.

12. Relevance Top
12.1. Relevance - User Needs

EHIS answers mainly to DG SANTE and DG EMPL policy needs. Data are also be used by researchers to make in-depth analyses on specific health issues. The EHIS aims at measuring on a harmonised basis and with a high degree of comparability among EU Member States the health status (including disability), health determinants and health care services (use and unmet needs) of the EU citizens. The topics included in the questionnaire both answer to policy driven needs and to scientific purposes. Within this framework, the EHIS concentrates on the main elements needed at EU level and does not intend to cover all detailed health aspects which can better be carried out via specific surveys or survey modules at national level, or at EU level when necessary.

The main users of the EHIS data are:

  • Institutional users like other Commission services, particularly DG SANTE and DG EMPL for their needs in relation to the OMC, JAF Health and ECHI indicators as well as national administrations (mainly those in charge of the monitoring of public health, or other international organisations);
  • Statistical users in Eurostat or in Member States National Statistical Institutes to feed sectoral or transversal publications such as the Eurostat yearbook and online publications, among other reports;
  • Researchers having access to microdata;
  • End users - including the media - interested in public health in the EU.
12.2. Relevance - User Satisfaction

Not available.

12.3. Completeness

EHIS covers only people living in private households (all persons aged 15 and over within the household are eligible for the operation), i.e. children 0-14 and persons living in collective households and in institutions are excluded from the target population.

13. Accuracy Top
13.1. Accuracy - overall

Not available.

13.2. Sampling error

Standard errors of key indicators are commonly used as a measure of the reliability of data collected through sample survey. In their national quality reports, Member states provided the standard error for 3 indicators based on the Minimum European Health Module (MEHM):

  • Proportion of respondents in good or very good health
  • Proportion of respondents with a longstanding illness
  • Proportion of respondents severely limited in activities people usually do because of health problems for at least the past 6 months.
13.3. Non-sampling error

The term 'non-sampling error' is a generic one that encompasses any errors other than sampling errors. The non-sampling errors discussed in this section are: coverage errors, measurement and processing errors, and non-response errors.

Coverage errors 

Coverage errors are caused by the imperfections of a sampling frame for the target population of the survey.

In EHIS two main groups can be defined in terms of the sampling frame used:

  • Some countries have relied on individual information from population registers. In order to make the best coverage of the target population, registers have to be updated frequently. It means any modification in the population (both people moving in and people moving out) must be reported as quickly as possible.
  • Other countries have used a sampling frame based on the Census. The databases also have to be updated to represent the units that have come into being after the Census and thus ensure the representativeness of the sample.

 A systematic source of coverage problems is the time lag between the reference date for the selection of the sample and the fieldwork period, which should be made the shortest.

Measurement and processing errors

Generally, measurement errors arise from the questionnaire, the interviewer, the interviewee and the data collection method used.

It is vital in a survey like EHIS, which collects a multitude of health components with different time period references, that the questionnaire is constructed so that the interviewee can provide all the correct information. In particular, experiences from pilot surveys were used in order to optimize the data collection process. The questionnaires were also tested (cognitive testing) in order to identify potential sources of problems.

Due to the complexity and the sensitivity of the survey, the interviewees could not or did not want to give information on specific topics (their alcohol consumption, their income etc).

Non-response errors

All surveys have to deal with non-response, i.e. information missing for some of the sample units. Unit non-response happens when no interview can be obtained, while item non-response does when only some of the items are missing. EHIS suffers from these two types of non-response:

  • Unit non-response: when an individual refuses to cooperate or is away during the fieldwork period. Other reasons can explain unit non-response: the questionnaire is lost; the individual is unable to respond because of incapacity or illness...
  • Item non-response: typically happens to questions the interviewee does not answer because he considers them personal or not easily understandable.

Non-response is a potential source of bias particularly if the non-responding units have specific survey patterns ('non-ignorable' non-response). For instance, persons with limitations (physical or sensorial) are less keen to give health information to an interviewer, thus some groups with particular features are under-represented in the sample and the estimates downwardly biased.

A majority of the countries applied calibration methods (i.e. changes in the weighting factors) in order to correct for non-response.

14. Timeliness and punctuality Top
14.1. Timeliness

There was no fixed time for transmitting data on EHIS wave 1 collection to Eurostat.

Regulation on EHIS wave 2 (Commission Regulation 141/2013) specified that "Microdata shall be made available at the latest by 30 September 2015 or nine months after the end of the national data collection period in cases where the survey is carried out beyond December 2014."

14.2. Punctuality

Not applicable for EHIS wave 1 and not yet available for EHIS wave 2.

15. Coherence and comparability Top
15.1. Comparability - geographical

EHIS aims at achieving an input standardisation. A standard model questionnaire (questions, answer categories, filters, etc.) as well as conceptual guidelines and rationales were prepared. Conceptual translation into all EU languages was requested. 

An assessment of the implementation of standard model questionaire in EHIS wave 2 is envisaged.

15.2. Comparability - over time

Not available.

15.3. Coherence - cross domain

EHIS and EU-SILC includes exactly the same three questions of the MEHM. An analysis performed in the past revealed differences in national adaptations of MEHM between EHIS wave 1 and EU-SILC for some countries. An assessment of the implementation of MEHM in EHIS wave 2 and EU-SILC is envisaged.

15.4. Coherence - internal

Not applicable.

16. Cost and Burden Top

Not available.

17. Data revision Top
17.1. Data revision - policy


17.2. Data revision - practice

Tables will be updated for countries for which data were not available at the time of last update.

18. Statistical processing Top
18.1. Source data

The data are collected via national surveys. EHIS may be implemented as a separate national survey or can be integrated into an existing national survey (i.e. national health interview survey, labour force survey, other household survey). In such a way Member States have had the maximum flexibility for implementation. However, across the EU the same data were collected according a common questionnaire.

18.2. Frequency of data collection

Every 5 years. First data collection took place between 2006 and 2009 (2008 round) and the second round between 2013 and 2015 (2014 round). The next round (EHIS wave 3) is planned for 2019.

18.3. Data collection

Data are collected via questionnaires and are obtained through face-to-face interviews, telephone interviews, self-administered questionnaires or by a combination of these means (depending on the country).

18.4. Data validation

Flags, codes added to each strata and defining a specific characteristic of the statistics in that strata, are used for dissemination purposes. Strata must be understood as the number of respondents belonging to the measured subgroup; for example the men in Bulgaria between 54 and 65 years old and having Upper secondary and post-secondary non-tertiary education. The strata sizes of the different samples were calculated as well as the missing percentages on the answers. Flags for eliminating too small strata and for indicating unreliable strata were applied as follows:

  • ":" no information available or the strata size is less than 20 sample observations or the item non-response exceeds 50%.
  • published with a flag "u: unreliable" if the estimate is based on 20 to 49 sample observations, or if the item non-response exceeds 20 % and is lower than or equal to 50 %.
  • no flag if the strata size is greater than 50 and the item non-response is below 20%.

"c: confidental" is set for data of Germany for EHIS wave 1 where strata sizes are below 20 observations. (Germany delivered aggregated data and indicated those cells).

18.5. Data compilation

Due to different time periods and incomplete coverage reasons, no EU aggregates are calculated from EHIS wave 1.

EU aggregate is calculated from EHIS wave 2. An EU aggregate is disseminated if the underlying data covers at least 70 % of the target population. If the EU aggregate is not based on data from all EU 28 countries, it is flagged as 'e' (estimated).

No imputation was applied in Eurostat but may have been applied on national level.

18.6. Adjustment

Personal/individual weights (not available for MT and EHIS wave 1) were applied to calculate national and EU aggregates.

19. Comment Top

Not available.

Related metadata Top

Annexes Top
EHIS wave 1 - national surveys overview
EHIS wave 1 - methodological documents
EHIS wave 2 - methodological documents