SNAC-K is a longitudinal study on the influence of life-time environmental and biological factors on medical, psychological and social health in late adulthood. It aims to increase the understanding of the aging process, and to identify possible preventive strategies to improve health and care of older adults.

The study consists of two parts: the population part and the care and services part. In the population part, a large, representative panel of elders in different age cohorts is followed over time to record and describe the aging process from different aspects. In the care and services part, a systematic, longitudinal, individually-based collection of data is performed concerning provision of care and services together with functional ability, specific health care problems, and living conditions of the recipients living in the area.

Overview

Acronym

SNAC-K

Website

SNAC-K Website

Investigators
Contacts
Start Year

2001

Study Design

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

The participants are followed-up at ages 60, 66, 72, 78, 81, 84, 87, 90, 93, 96 and 99 years. 60- 70 year olds are followed-up every 6 years and 81+ year olds are followed-up ever 3 years.

Recruitment Target
  • Individuals
Number of Participants

4,430

Number of Participants with Biosamples

3,800

Supplementary Information

Every 3 years participants 81+ yeas old ar followed-up and every 6 years, participants 60-70 are followed-up. New cohorts were added in 2007-2010 (81 year olds), 2010-2012 (60 year olds), 2013-2015 (81 year olds).

Access

Access to external researchers or third parties provided or foreseen.

Data (questionnaire-derived, measured...)

Biosamples

Other Access A sub-sample of 613 participants underwent MRI brain scanning.

Marker Paper

Lagergren M, Fratiglioni L, Hallberg IR et al., A longitudinal study integrating population, care and social services data. The Swedish National study on Aging and Care (SNAC). Aging Clin Exp Res. 2004 Apr;16(2):158-68.

PUBMED 15195992

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.

Populations

SNAC-K - Care System Study

The population consists of all persons aged 65 years and older and living in the central part of Stockholm, Kungsholmen, and using long-term care and services.

Sources of Recruitment

Specific Population
  • Other specific population :

    Users of home help services, long-term home health care or rehabilitation or special housing.

Selection Criteria

Age Minimum age 65
Country Sweden
Territory

Area of Kungsholmen/Essingeöarna

Data Collection Events

NameDescriptionStartEnd
SNAC-K - Care System Study - Surveys

Data were collected each year in the spring....

2001 (February)2018

SNAC-K - Population Study

The SNAC-K population consists of a random sample of 60+ old individuals living both at home and in institutions, in the central part of Stockholm, Kungsholmen.

Sources of Recruitment

General Population
  • Selected sample
Supplementary Information

The sample was chosen in the national project SNAC and it was stratified for age cohort and year of assessment. Eleven age cohorts were chosen with different intervals, being six years in the younger cohorts (60-78 years old), and three years in the older cohorts (78+ years old).

Selection Criteria

Age Minimum age 60
Country Sweden
Territory

Area of Kungsholmen/Essingeöarna

Sample Size

Number of Participants

4,430

Number of Participants with Biosamples

3,800

Supplementary Information about Number of Participants

  • Phase 1 2001-2004: 3363 participants baseline.
  • Phase 2 2004-2007: 992 participants follow-up (81+ older).
  • Phase 3 2007-2010: 2251 participants (2057 followed up (all ages), 194 new (81 year olds).
  • Phase 4 2010-2012: 1528 participants(850 participants follow-up (only 81+ year olds), 678 new (60 year olds).
  • Phase 5 2013-2015: 1603 participants (1408 participants follow-up (all ages), 195 new (81 year olds).
  • Phae 6 2016-2018: Ongoing follow-up.

Data Collection Events

NameDescriptionStartEnd
SNAC-K - Population Study - Baseline

Each subject was examined for six hours on...

2001 (March)2004 (June)
SNAC-K - Population Study - Follow-up1

The same protocol as for the baseline data...

20042007
SNAC-K - Population Study - Follow-up2

The same protocol as for the baseline data...

20072010
SNAC-K - Population Study - Follow-up3

The same protocol as for the baseline data...

20102012
SNAC-K - Population Study - Follow-up4

The same protocol as for the baseline data...

20132015
SNAC-K - Population Study - Follow-up5

The same protocol as for the baseline data...

20162018
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Variable Classification