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Article History

Received: 22 April 2024

Accepted: 24 September 2024

First Online: 11 October 2024

Declarations

:

: Permission to use national mortality registers was given by the national register authority, Statistics Finland, and the Population Register.

: The authors declare no competing interests.

: The authors have no competing interests to declare that are relevant to the content of this article.

: not applicable to this study.

: The Tampere Longitudinal Study on Aging (TamELSA) started as part of the World Health Organization’s (WHO) Eleven Country Study on Health Care in 1979. In the TamELSA study, the data collection is historically old. At the time of data collection, data was collected only by interviews and no hospital record data was used. The researchers also did not need an ethical statement as there was no specific Finnish legislation governing non-medical studies in place at that time.

: At that time, the participants were sent a letter in which the aims and procedures of the study were explained, and a time for a face-to-face interview was suggested. Voluntary participation was emphasized, and if the participant agreed to meet the interviewer and participated in the interview, this was regarded as implicit consent to participate in the study.

: However, later, authorizations to link with national mortality registers were obtained from the national register authority, Statistics Finland, and the Population Register.