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Association of participation in the Northern Finland Birth Cohort 1986 with mental disorders and suicidal behaviour




TekijätKerkelä Martta, Gissler Mika, Veijola Juha

KustantajaKorean Society of Epidemiology

Julkaisuvuosi2022

JournalEpidemiology and Health

Artikkelin numeroe2022005

Vuosikerta44

eISSN2092-7193

DOIhttps://doi.org/10.4178/epih.e2022005

Verkko-osoitehttps://doi.org/10.4178/epih.e2022005

Rinnakkaistallenteen osoitehttps://research.utu.fi/converis/portal/detail/Publication/174797645


Tiivistelmä

OBJECTIVES

In prospective follow-up studies, participants are normally contacted during the follow-up period. Even though the idea is not to intervene, the studies conducted during follow-up may affect the target population. Our hypotheses were that participation in the prospective Northern Finland Birth Cohort 1986 study (NFBC 1986) increased the use of mental health services and reduced suicidal behaviour due to participation in follow-up studies.

METHODS

The NFBC 1986 study covered people with an expected date of birth between July 1985 and June 1986 in northern Finland (n=9,396). The participants of the NFBC 1986 were followed since the antenatal period with follow-ups including clinical examinations. The comparison cohort comprised people born in the same area in 1987 (n=8,959), who were not contacted. Registry data on psychiatric treatment, suicide attempts, and suicides were available. Crude risk ratios (RRs) and adjusted (for marital status and education) Mantel-Haenszel RRs were reported.

RESULTS

No increase in mental disorders were found in NFBC 1986 compared to comparison cohort. In the crude RR analysis of female participants, a lower risk for suicide attempts was found (RR, 0.67; 95% confidence interval, 0.49 to 0.92; p=0.011).

CONCLUSIONS

The results did not support our first hypothesis regarding the increased use of mental health services in the NFBC 1986 cohort. However, our second hypothesis gained some support as female participants of the NFBC 1986 had a lower risk of suicide attempts, although it was not due to a higher number of participants receiving psychiatric treatment.


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