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POL-TAR: Tarnobrzeg Voivodship/Krakow Contributors from the MPC: Eva Kawalec and Andrzej Pajak

© National Institute for Health and Welfare and the MORGAM Project investigators Last updated: 18 May 2006 For more information, please contact Kari Kuulasmaa (firstname.lastname@thl.fi)

Contents

• Cohort identification
• Cohort recruitment and the baseline examination
• End-points followed up
• End of follow-up period
• Follow-up procedures
• Diagnostic procedures
  • at baseline
  • during follow-up

Cohort identification

• Country: Poland
• MPC: 35 - Krakow
  • Administrative Centre: Department of Epidemiology and Population Studies, Institute of Public Health, Faculty of Health Care, Medical College Jagiellonian University, Krakow
  • Key personnel: Andrzej Pajak (Principal Investigator), Eva Kawalec
• RUs: Tarnobrzeg Voivodship, south-eastern province of Poland. Small towns and rural communities. Agricultural, but steel industry, sulphur mining etc. Below-average cardiovascular disease mortality in Poland, increasing until 1992 and decreasing afterwards.
  • 01: Tarnobrzeg Intervention
  • 02: Tarnobrzeg Control
• RUAs
  • POL-TARa: combining RUs 01 and 02
• Cohorts:
  • Cohort 01: Respondents of representative samples of 35-64 years old men and women of the RUs. The baseline survey was carried out in 1983-84.
  • Cohort 02: Respondents of representative samples of 35-64 years old men and women of the RUs. The baseline survey was carried out in 1987-88.
  • Cohort 03: Respondents of representative samples of 35-64 years old men and women of the RUs. The baseline survey was carried out in 1992-93.

Cohort recruitment and the baseline examination

The cohorts were formed by the respondents of representative sample surveys of the RUs. Electoral register was used as sampling frame for the single stage sampling, which was stratified by sex and 10-year age group. The baseline examinations were carried out as part of the WHO MONICA Project.

The size of the MORGAM cohorts and the response rates of the population surveys from which the cohorts were derived are:

DNA are not available for the cohorts.

End-points followed up

• Deaths: yes
• Non-fatal acute MI: no
• Unstable angina pectoris: no
• Silent MI: no
• Cardiac revascularization: no
• Stable angina pectoris: no
• Non-fatal stroke events: no
• Thromboembolic events: no

End of follow-up period

• Fatal events: 31 December 1998
• Non-fatal events: no follow-up

Follow-up procedures

Sources of data

• Voivodship Death Register: At the time of the study the Voivodship Statistical Office kept local death register, which included the causes of death based on death certificates issued by physicians. The register covered all deaths in the province of Voivodship. The register did not include data on deaths occurring abroad.
• Local Address Register

Procedures

The cohorts were linked to the Voivodship Death Register to identify the deaths. Record linkage was done using person's date of birth and address. Notifications of loss-to-follow-up due to person's moving out of the area of Voivodship were received from the Local Address Register. The linkage was done using the person's name, date of birth, sex and address. If the linkage failed, the person was recognized as lost to follow-up due to an unknown reason.

Diagnostic procedures

At baseline:

• History of MI:
  • Documented: data not available
  • Self-reported: An affirmative answer to the question "Have you ever had a heart attack (myocardial infarction, acute coronary heart disease or myocardial ischemia)?" was considered as self-reported history of MI.
  • ECG: data not available
  • Rose questionnaire: As specified in item HISMI4 of MORGAM Form 21
• History of cardiac revascularisation:
  • Documented: data not available
  • Self-reported: data not available
• History of angina pectoris:
  • Documented: data not available
  • Rose questionnaire: As specified in item HISAP2 of MORGAM Form 21.
  • Self-reported: data not available
• History of coronary heart disease, type unspecified: data not available
• History of stroke:
  • Documented: data not available
  • Self-reported: An affirmative answer to the question "Have you ever been told by a doctor that you had a stroke or brain ischemia in the past?" was considered as self-reported history of stroke.
• History of Diabetes: An affirmative answer to the question "Have you ever had diabetes?" was considered as self-reported history of diabetes.

During follow-up:

• Deaths: Cause of death codes from death certificates, which were received from the Voivodship Death Register, were used for the relevant items of MORGAM Form 25.
• Coronary deaths: The diagnostic classification was done in the MDC using the ICD-codes of the underlying cause of death provided in item DEATHDU:

  Underlying cause of death code		MORGAM DGNCAT
  ICD-9	ICD-10
  410-414	I21-I25	3
  401, 440, 798	I46, I70, R96, R98, R99	5
  Other than above codes	Other than above codes	7

• Stroke deaths: The diagnostic classification was done in the MDC using the ICD-codes of the underlying cause of death:

  Underlying cause of death code accepted as stroke		MORGAM DGNCAT
  ICD-9	ICD-10
  430, 431, 433, 434, 436, 437, 438	I60, I61, I63, I64, I69	9
  Other than above codes	Other than above codes	4

• Nonfatal events: not followed up

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