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Danish 1905 Cohort Study
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Danish 1905 Cohort Study

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Datasets -
Variables -
Start Year
1998
End Year
2005
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Investigators Contacts
  • Prof. Kaare Christensen
    University of Southern Denmark
  • Prof. Bernard Jeune
    University of Southern Denmark
  • Prof. Kaare Christensen
    University of Southern Denmark

Design

Study design
Cohort
Follow Up

The first wave took place in 1998 and the follow-up in 2000, 2003 and 2005.

Marker Paper

Nybo H, Gaist D, Jeune B, Bathum L, McGue M, Vaupel JW, Christensen K. The Danish 1905 cohort: a genetic-epidemiological nationwide survey. Journal of aging and health, 2001; 13(1): 32-46.

PUBMED 11503846

Recruitment

Recruitment Target
  • Individuals

Number of Participants

Number of Participants
2,262
Number of Participants with Biological Samples
1,651

Access

Availability of data and biosamples

Possible Access to Data
Possible Access to Biosamples
Other
Yes
No
Not applicable
Don't know

Timeline

1905 Cohort

Selection Criteria
Minimum age
92
Maximum age
93
Newborns
Twins
Countries
  • Denmark

Recruitment

Sources of recruitment
  • General population
Supplementary Information

Entire cohort (participation rate: 63%)

The cohort members were traced through the Danish Civil Registration System, which keeps a record of all those living in Denmark since 1968. The register contains information on name, date of birth, residence, marriage and vital status.

Number of Participants

Number of Participants
2,262
Number of Participants with Biological Samples
1,651
Supplementary Information about selection criteria

Wave 1: 2262 participants (1651 with biological sample)

Wave 2: 1086 participants

Wave 3: 437 participants

Wave 4: 166 participants

Data Collection Events
# Name Description Start End
0 1905 - Wave 1

The survey consisted of an interview and testing of mental and physical functioning.

The interview part covered the following topics: sociodemographic factors, self-reported ...

 1998 1998
1 1905 - Wave 2

The survey consisted of an interview and testing of mental and physical functioning.

The interview part covered the following topics: sociodemographic factors, self-reported ...

 2000 2000
2 1905 - Wave 3

The survey consisted of an interview and testing of mental and physical functioning.

The interview part covered the following topics: sociodemographic factors, self-reported ...

 2003 2003
3 1905 - Wave 4

The survey consisted of an interview and testing of mental and physical functioning.

The interview part covered the following topics: sociodemographic factors, self-reported ...

 2005 2005

Classifications

Socio-demographic and economic characteristics
Lifestyle and behaviours
Birth, pregnancy and reproductive health history
Perception of health, quality of life, development and functional limitations
Diseases
Symptoms and signs
Medication and supplements
Non-pharmacological interventions
Health and community care services utilization
Death
Physical measures and assessments
Laboratory measures
Cognition, personality and psychological measures and assessments
Life events, life plans, beliefs and values
Preschool, school and work life
Social environment and relationships
Physical environment
Administrative information
Cognitive functioning
Personality
Psychological distress and emotions
Other psychological measures and assessments
Perception of health
Quality of life
Life course development
Functional limitations
Other perception of health, quality of life and functional limitation-related information

Socio-demographic and economic characteristics

Age/birthdate
Sex/gender
Marital/partner status
Family and household structure
Education
Residence
Labour force and retirement
Income, possessions, and benefits

Lifestyle and behaviours

Tobacco
Alcohol
Physical activity
Leisure activities
Other and unspecified lifestyle information

Birth, pregnancy and reproductive health history

Puberty, menstruation, menopause and andropause
Pregnancy, delivery and birth

Perception of health, quality of life, development and functional limitations

Perception of health
Quality of life
Functional limitations
Use of assistive devices

Diseases

Neoplasms (C00-D48)
Endocrine, nutritional and metabolic diseases (E00-E90)
Mental and behavioural disorders (F00-F99)
Diseases of the nervous system (G00-G99)
Diseases of the eye and adnexa (H00-H59)
Diseases of the ear and mastoid process (H60-H95)
Diseases of the circulatory system (I00-I99)
Diseases of the respiratory system (J00-J99)
Diseases of the digestive system (K00-K93)
Diseases of the skin and subcutaneous tissue (L00-L99)
Diseases of the musculoskeletal system and connective tissue (M00-M99)
Diseases of the genitourinary system (N00-N99)
Certain conditions originating in the perinatal period (P00-P96)
Injury, poisoning and certain other consequences of external causes (S00-T98)
External causes of morbidity and mortality (V01-Y98)
Diseases without precise specification or falling into multiple categories

Symptoms and signs

Symptoms and signs involving the circulatory and respiratory systems (R00-R09)
Symptoms and signs involving the digestive system and abdomen (R10-R19)
Symptoms and signs involving nervous and musculoskeletal systems (R25-R29)
Symptoms and signs involving the urinary system (R30-R39)
Symptoms and signs involving cognition, perception, emotional state and behaviour (R40-R46)
Symptoms and signs involving speech and voice (R47-R49)
General symptoms and signs (R50-R69)
Symptoms related to multiple categories

Medication and supplements

Medication and supplement intake
Posology and protocol of administration

Non-pharmacological interventions

Surgical interventions
Other and unspecified non-pharmacological interventions

Health and community care services utilization

Community and social care

Death

Vital status

Physical measures and assessments

Physical characteristics
Anthropometry
Circulation and respiration
Muscles, skeleton and mobility
Sensory and pain

Cognition, personality and psychological measures and assessments

Cognitive functioning
Psychological distress and emotions
Other psychological measures and assessments

Life events, life plans, beliefs and values

Life events
Life plans

Preschool, school and work life

Work life

Social environment and relationships

Social participation
Social support

Administrative information

Identifiers
Questionnaire and interview-related information
Physical and cognitive measure and biosample-related information
Other administrative information

Cognitive functioning

Backward Digit Span Task
Category Fluency Test
Delayed Word Recall
Forward Digit Span Task
Immediate Free Word Recall Test
Mini-Mental State Examination

Psychological distress and emotions

CAMDEX Depression Scale

Functional limitations

Activities of Daily Living
Physical Activities of Daily Living