Betula Study

Overview

Acronym
Betula
Website
Betula
Investigators
  • Prof. Lars Nyberg

    Umeå universitet

  • Dr. Anna Sundström

    Umeå universitet

  • Dr. Michael Rönnlund

    Umeå universitet

  • Pr. Rolf Adolfsson

    Umeå universitet

Contacts
  • Mikael Stiernstedt

    Umeå universitet

General Design

Study design
Cohort
Start Year
1988
End Year
2014
General Information on Follow Up (profile, frequency)
Recruitment Target
  • Individuals
Number of Participants
4,425
Number of Participants with Biological Samples
4,300

Access

Availability of data and biosamples

Possible Access to Data
Possible Access to Biosamples
Other

Marker Paper

Nilsson L-G, Adolfsson R, Bäckman L, de Frias C, Molander B, Nyberg L. Betula: A Prospective Cohort Study on Memory, Health and Aging. Aging, Neuropsychology and Cognition,2004; 11 (2-3), 134-148.

Supplementary Information

Timeline

Populations

Betula - Cohort 1

Selection Criteria

Minimum age
35
Maximum age
80
Countries
  • Sweden
Territory
Municipality of Umeå, Västerbotten
Other Criteria
When participants entered the study, they were excluded if they had a severe visual or auditory disability, intellectual disability, dementia or a native language other than Swedish.

Sources of Recruitment

General Population
  • Selected sample
Supplementary Information

Sample Size

Number of Participants
1,000
Supplementary Information about Population

Data Collection Events

# Name Description Start End
0 Betula - Cohort 1 - T1 1988 (November) 1991 (April)
1 Betula - Cohort 1 - T2 1993 (September) 1995 (September)
2 Betula - Cohort 1 - T3 1998 (September) 2001 (March)
3 Betula - Cohort 1 - T4 2003 (September) 2005 (November)
4 Betula - Cohort 1 - T5 2008 (October) 2010 (March)
5 Betula - Cohort 1 - T6 2013 (September) 2014 (July)
Betula - Cohort 2

Selection Criteria

Minimum age
35
Maximum age
80
Countries
  • Sweden
Territory
Municipality of Umeå, Västerbotten
Other Criteria
When participants entered the study, they were excluded if they had a severe visual or auditory disability, intellectual disability, dementia or a native language other than Swedish.

Sources of Recruitment

General Population
  • Selected sample
Supplementary Information

Sample Size

Number of Participants
994
Supplementary Information about Population

Data Collection Events

# Name Description Start End
0 Betula - Cohort 2 - T1 1993 (September) 1995 (September)
1 Betula - Cohort 2 - T2 1998 (September) 2001 (March)
Betula - Cohort 3

Selection Criteria

Minimum age
40
Maximum age
84
Countries
  • Sweden
Territory
Municipality of Umeå, Västerbotten
Other Criteria
When participants entered the study, they were excluded if they had a severe visual or auditory disability, intellectual disability, dementia or a native language other than Swedish.

Sources of Recruitment

General Population
  • Selected sample
Supplementary Information

Sample Size

Number of Participants
963
Supplementary Information about Population

Data Collection Events

# Name Description Start End
0 Betula - Cohort 3 - T1 1993 (September) 1995 (September)
1 Betula - Cohort 3 - T2 1998 (September) 2001 (March)
2 Betula - Cohort 3 - T3 2003 (September) 2005 (November)
3 Betula - Cohort 3 - T4 2008 (October) 2010 (March)
4 Betula - Cohort 3 - T5 2013 (September) 2014 (July)
Betula - Cohort 4

Selection Criteria

Minimum age
35
Maximum age
90
Countries
  • Sweden
Territory
Municipality of Umeå, Västerbotten
Other Criteria
When participants entered the study, they were excluded if they had a severe visual or auditory disability, intellectual disability, dementia or a native language other than Swedish.

Sources of Recruitment

General Population
  • Selected sample
Supplementary Information

Sample Size

Number of Participants
553
Supplementary Information about Population

Data Collection Events

# Name Description Start End
0 Betula - Cohort 4 - T1 1998 (September) 2001 (March)
Betula - Cohort 5

Selection Criteria

Minimum age
35
Maximum age
95
Countries
  • Sweden
Territory
Municipality of Umeå, Västerbotten
Other Criteria
When participants entered the study, they were excluded if they had a severe visual or auditory disability, intellectual disability, dementia or a native language other than Swedish.

Sources of Recruitment

General Population
  • Selected sample
Supplementary Information

Sample Size

Number of Participants
558
Supplementary Information about Population

Data Collection Events

# Name Description Start End
0 Betula - Cohort 5 - T1 2003 (September) 2005 (November)
Betula - Cohort 6

Selection Criteria

Minimum age
25
Maximum age
80
Countries
  • Sweden
Territory
Municipality of Umeå, Västerbotten
Other Criteria
When participants entered the study, they were excluded if they had a severe visual or auditory disability, intellectual disability, dementia or a native language other than Swedish.

Sources of Recruitment

General Population
  • Selected sample
Supplementary Information

Sample Size

Number of Participants
357
Supplementary Information about Population

Data Collection Events

# Name Description Start End
0 Betula - Cohort 6 - T1 2008 (October) 2010 (March)
1 Betula - Cohort 6 - T2 2013 (September) 2014 (July)

Individual Studies Included

Acronym Name Study design Participants Countries

Harmonization Projects Included

Acronym Name

Networks

Acronym Name Studies

Datasets

Name Type Data Collection Events Variables
Last Update: 2021-07-26 20:33