Study design

The Lc65+ project is a population-based longitudinal study with cohort-sequential design.

The Lc65+ cohort consists of four successive samples randomly selected every 5 or 10 years from the Lausanne city population office.

Participants, approximately 1,500 in each sample, are enrolled according to two criteria : a private home address in the city of Lausanne and a year of birth defined by the year of enrollment.

Two exclusion criteria apply: presence of severe cognitive troubles precluding a response to questionnaires and end-of-life situations.

Sample

Sample

Enrolement year

Enrolement year

Birth year

Birth year

Sample

C1 (before World War II)

Enrolement year

2004

Birth year

1934-1938

Sample

C2 (during World War II)

Enrolement year

2009

Birth year

1939-1943

Sample

C3 (early baby boom)

Enrolement year

2014

Birth year

1944-1948

Sample

C4 (mid-baby boom)

Enrolement year

2024

Birth year

1954-1958

Four successive samples were randomly selected every 5 or 10 years:

Lc65+ study design