The Swedish Adoption/Twin Study on Aging (SATSA) was designed to study the origins of individual differences in aging and the environmental and genetic factors that are involved.

Overview

Acronym

SATSA

Website

SATSA Website

Investigators
Contacts
Start Year

1984

Study Design

Study Design Cohort
General Information on Follow Up (profile, frequency)

SATSA was started with a survey in 1984, and eight additional waves were conducted in 1987, 1990, 1993, 2004, 2007, 2010, 2012 and 2014. The questionnaire was initially sent to all twins from the Swedish Twin Registry who were separated at an early age and raised apart. There was also a control sample of twins who were raised together.

From 1986 to 2014, there were ten waves of an in-person testing (IPT) component for pairs who were over 50 years of age and had both responded to the initial questionnaire.

Recruitment Target
  • Families
Number of Participants

2,019

Number of Participants with Biosamples

859

Access

Yes
No
Not Applicable
Don't know
Possible Access to Data

Possible Access to Biosamples

Other

Marker Paper

Pedersen, N. L., McClearn, G. E., Plomin, R., Nesselroade, J. R., Berg, S., & DeFaire, U. (1991). The Swedish Adoption Twin Study of Aging: an update. Acta Genet Med Gemellol (Roma), 40(1), 7-20.

PUBMED 1950353

Supplementary Information

Also see (attached):

Finkel, D., & Pedersen, N. L. (2004). Processing Speed and Longitudinal Trajectories of Change for Cognitive Abilities: The Swedish Adoption/Twin Study of Aging. Aging, Neuropsychology, and Cognition, 11(2-3), 325-345. doi: 10.1080/13825580490511152

Documents

Study Timeline

Each colour in the timeline graph below represents a separate Study Population, while each segment in the graph represents a separate Data Collection Event. Clicking on a segment gives more detailed information on a Data Collection Event.

Population

SATSA - Population

The SATSA population consists of a base sample of a selected subset of twins reared apart (TRA) from the Swedish Twin Registry (STR), and a control sample of twins reared together (TRT) also from the STR matched on gender, age, and county of birth.  

Sources of Recruitment

General Population
  • Selected sample
Supplementary Information

Twins reared apart, and a control sample of twins reared together were matched on gender, age and county of birth.

Selection Criteria

Age Minimum age 26
Twins
Country Sweden
Ethnic Origin Swedish

Sample Size

Number of Participants

2,019

Number of Participants with Biosamples

859

Supplementary Information about Number of Participants

Q1: 2018 participants

Q2: 1637 participants

Q3: 1496 participants

Q4: 1450 participants

Q5: 794 participants

Q6: 648 participants

Q7: 568 participants

Q8: 463 participants

Q9: 414 participants

IPT1: 645 participants

IPT2: 595 participants

IPT3: 569 participants

IPT4: 40 participants

IPT5: 541 participants

IPT6: 448 participants

IPT7: 379 participants

IPT8: 331 participants

IPT9: 300 participants

IPT10: 269 participants

 

Data Collection Events

NameDescriptionStartEnd
SATSA - Q1

The mail-out questionnaires assessed physical...

1984 (November)1985 (February)
SATSA - IPT1

Twin pairs who were over 50 years of age and...

1986 (February)1988 (December)
SATSA - Q2

The mail-out questionnaires assessed physical...

1987 (November)1988 (February)
SATSA - IPT2

Twin pairs who were over 50 years of age and...

1989 (February)1991 (December)
SATSA - Q3

The mail-out questionnaires assessed physical...

1990 (November)1991 (February)
SATSA - IPT3

Twin pairs who were over 50 years of age and...

1992 (February)1994 (December)
SATSA - Q4

The mail-out questionnaires assessed physical...

1993 (November)1994 (February)
SATSA - IPT4

Twin pairs who were over 50 years of age and...

1995 (March)1995 (May)
SATSA - IPT5

Twin pairs who were over 50 years of age and...

1999 (February)2001 (December)
SATSA - IPT6

Twin pairs who were over 50 years of age and...

2002 (February)2004 (December)
SATSA - Q5

The mail-out questionnaires assessed physical...

2004 (May)2005 (February)
SATSA - IPT7

Twin pairs who were over 50 years of age and...

2005 (February)2007 (December)
SATSA - Q6

The mail-out questionnaires assessed physical...

2007 (November)2008 (February)
SATSA - IPT8

Twin pairs who were over 50 years of age and...

2008 (February)2010 (December)
SATSA - Q7

The mail-out questionnaires assessed physical...

2010 (November)2011 (February)
SATSA - IPT9

Twin pairs who were over 50 years of age and...

2010 (February)2012 (December)
SATSA - Q8

The mail-out questionnaires assessed physical...

2012 (November)2013 (February)
SATSA - IPT10

Twin pairs who were over 50 years of age and...

2012 (February)2014 (December)
SATSA - Q9

The mail-out questionnaires assessed physical...

2014 (November)2015 (February)
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Variable Classification