The Study of Men Born in 1943

The Study of Men Born in 1943 - A Longitudinal Cohort Study From Middle-Age and Onward

A random sample a random sample of half of all men born in 1943 and living in the city of Gothenburg, Sweden, have been investigated in 1993 at 50 years of age and will be followed continuously with repeated re-examinations and follow-up concerning mortality and cardiovascular diseased. Out of 1463 invited men, 798 (54.5%) accepted the invitation and is included in this longitudinal cohort study.

Study Overview

• Status: Active, not recruiting
• Conditions: Cardiovascular Diseases; Atrial Fibrillation; Sleep Apnea; Cardiovascular Risk Factor; Congestive Heart Failure

Detailed Description

In January 1993 a random sample of half of all men born in 1943 and living in the city of Gothenburg, Sweden, was selected and invited to participate a longitudinal observational cohort study. Out of 1463 invited men, 798 (54.5%) accepted the invitation and were examined for 1st time between February 1993 and June 1994. All participants, at 50 years of age, underwent a physical examination including anthropometric measurements, blood pressure and ECG. Several questionaires about previous diseases, life style, physical stress, family history, medications, symptoms and psychosocial factors were included. Blood samples were drawn from an antecubital vein after a nights fast. Basal laboratory analysis were performed. In addition several samples of whole blood, serum and plasma were stored in a freezer (-80○ Celsius) for later analysis.

In 2003, at 60 years of age, a 2nd examination was performed with similar methodology and examination´s. At this time 655 of the original 798 men participated.

A 3rd examination was performed between May 2014 and December 2014. In addition to physical examinations, questionnaires and laboratory analysis an echocardiographic examination, a sleep recording, screening for atrial fibrillation with thumb-EKG and investigation with Arteriography was added.

Echocardiographic examinations were performed by experienced cardiologist in accordance with clinical routine using ultrasound system (Vivid 7 Dimension, GE Medical systems, Horten, Norway), together with commercially available analysis software (GE Vingmed Ultrasound EchoPAC PC, General Electric Healthcare, Little Chalfont, UK) and in agreement with ESC guideline for echocardiography EAE recommendations.

The sleep recording was conducted for one night in the patients home using Apnélink, Apnélink plus or Apnélink air. All participants also answered the Epworth sleepiness scale (ESS) and the functional outcome of sleep questionnaire (FOSQ).

Screening for atrial fibrillation were performed using a thumb-ECG (Zenicor Medical System, Sweden), during a two week-period immediately after the physical examination. ECG was registered by the participants at their home, by placing their thumbs on two electrodes for 30 seconds two times a day, one time in the morning and one in the evening, and also additionally in case they experience any symptoms such as dizziness or palpitations, in a duration of a 2-week period.

In Sweden, all hospital admissions since 1978 are registered in the National Patient Register (NPR) and classified according to the International Classification of Diseases (ICD 8 until 1986; ICD 9 until 1996, ICD 10 since 1997 and continuing). At each examination, information about hospitalizations, medication and morbidity was obtained. During follow-up, death certificates, autopsy reports, and medical records were obtained and studied for all participants. Follow-up will be continues for each of the original 798 participants until death. New examinations will be performed every 5-10 years during follow-up.

Endpoints that are registered include: death, cause of death, myocardial infarction, ischemic heart disease, heart failure with reduced, mid-range and preserved ejection fraction, atrial fibrillation, cerebral infarction, cerebral haemorrhage, diabetes mellitus, deep vein thrombosis, pulmonary embolism, any cancer, fractures and dementia.

The study complies with the Declaration of Helsinki, and the study protocols was approved by the Ethical Committee of Gothenburg (DNR 157-93 in 1993, DNR: 67-03, in 2003 and DNR 649-13 in 2013).

Aims:

1. To study the incidence and prevalence of cardiovascular risk factors and cardiovascular diseases in a random sample from the general population.
2. To study secular trends in cardiovascular risk factors and cardiovascular diseases by comparing this cohort of men born in 1943 to other cohorts of men born in 1913, 1923, 1933, 1953 and 1963 living in the same geographic area and investigated using the same methodology.

3. To study risk factors for various cardiovascular diseases in a longitudinal cohort study.

   In 2016 all men who participated in the 2014 examiniation was invited to a cognitive screening. In total 333 of these men particpated in the screening which included the following tests: Immediate and Delayed Text Recall, Symbol Digit Modalities Test (SDMT), reduced version of The Boston Naming Test, The Clox and Cube Test, The Token Test, Stroop III, Ray-Osterrieth Complex Figure Test (ROCF), F-A-S verbal fluency test. Parallel Serial Mental Operations (PaSMO), and Trailmaking A.

   An additional aim was then added:

4. To study risk factors for dementia / cognitive impairment

• Study Type: Observational
• Enrollment (Actual): 798

Contacts and Locations

Study Locations

• Sweden
  • Västra Götaland Region
    • Gothenburg, Västra Götaland Region, Sweden, 416 85
      • Sahlgrenska University Hospital / Östra

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 50 years to 50 years (Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: Male

• Sampling Method: Probability Sample

Study Population

A random population sample consisting half of all men born in 1943 and living in the city of Gothenburg, Sweden was invited. . Out of 1463 invited men, 798 (54.5%) accepted participation.

Description

Inclusion Criteria:

• Men born in 1943 and living in the city of Gothenburg, Sweden

Exclusion Criteria:

• None

Study Plan

How is the study designed?

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Cardiovascular diseases	Alla major cardiovascular events including cardiovascular death, myocardial Infarction, congestive heart failure atrial fibrillation, stroke and venous thromboembolism	from date of first examination until the date of endpoint or date of death from any cause, whichever come first assessed up to 20, 30, 40 and 50 years

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Sleep apnoea syndrome	Apnoea and hypopnoea as well as desaturation defined according to guide lines for scoring sleep apnoea.	at 71 years of age

Collaborators and Investigators

• Sponsor: Sahlgrenska University Hospital, Sweden

Publications and helpful links

General Publications

• Barywani SB, Ostgard Thunstrom E, Mandalenakis Z, Hansson PO. Body iron stores had no impact on coronary heart disease outcomes: a middle-aged male cohort from the general population with 21-year follow-up. Open Heart. 2022 Apr;9(1):e001928. doi: 10.1136/openhrt-2021-001928.
• Sakalaki M, Hansson PO, Rosengren A, Thunstrom E, Pivodic A, Fu M. Multi-modality biomarkers in the early prediction of ischaemic heart disease in middle-aged men during a 21-year follow-up. BMC Cardiovasc Disord. 2021 Feb 2;21(1):65. doi: 10.1186/s12872-021-01886-x. Erratum In: BMC Cardiovasc Disord. 2021 Feb 23;21(1):111.
• Chen X, Thunstrom E, Hansson PO, Rosengren A, Mandalenakis Z, Zhong Y, Ergatoudes C, Caidahl K, Fu M. High prevalence of cardiac dysfunction or overt heart failure in 71-year-old men: A 21-year follow-up of "The Study of men born in 1943". Eur J Prev Cardiol. 2020 May;27(7):717-725. doi: 10.1177/2047487319871644. Epub 2019 Aug 25.

Study record dates

Study Major Dates

• Study Start (Actual): February 9, 1993
• Primary Completion (Anticipated): December 31, 2043
• Study Completion (Anticipated): December 31, 2043

Study Registration Dates

• First Submitted: April 26, 2017
• First Submitted That Met QC Criteria: April 28, 2017
• First Posted (Actual): May 3, 2017

Study Record Updates

• Last Update Posted (Actual): August 19, 2020
• Last Update Submitted That Met QC Criteria: August 17, 2020
• Last Verified: August 1, 2020

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Pathologic Processes; Heart Diseases; Arrhythmias, Cardiac; Heart Failure; Cardiovascular Diseases; Atrial Fibrillation
• Other Study ID Numbers: SahlgrenskaUH/Östra

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No