2026-07-06T19:38:40Z https://oai.datacite.org/oai

doi:10.34881/taf1jh 2026-04-16T15:27:54Z JJUZ GESIS.SSRI

1 GESIS.SSRI 10.34881/TAF1JH Erlingur Johannsson Erlingur Johannsson https://orcid.org/0000-0002-8028-7851 Háskóli Íslands GAGNÍS (DATICE) 2026 Medicine, Health and Life Sciences Social Sciences Mental heatlh Sleep Child health Lifestyle and health Health status Health.GeneralHealthAndWellbeing Erlingur Johannsson Erlingur Johannsson Háskóli Íslands Gagnaþjónusta vísinda á Íslandi Háskóli Íslands Erlingur Johannsson Erlingur Johannsson Háskóli Íslands Erlingur Johannsson Erlingur Johannsson 2026-04-16 2026-04-16 2026-04-16 2026-04-16 2003-01-01/2024-01-01 Survey data 10.34881/TAF1JH/TTXY3G 65807 application/pdf 1.0 Custom terms specific to this dataset The main scientific aim of the Health Journey Study was to examine associations between lifestyle behaviors and health-related risk factors within a single cohort across three life stages: adolescence, emerging adulthood, and established adulthood. The emphasis is on examining changes in health from adolescence to adulthood and on investigating how early-life health is linked to adult health. An Icelandic cohort born in 1988 was measured at ages 15 (Wave 1 in 2003, N = 443), 23 (Wave 2 in 2011, N = 201), and 36 (Wave 3 in 2024, N = 491). In 2003, Iceland was highly homogeneous. Therefore, the sampling strategy emphasized the geographical distribution of participants (rather than ethnicity or religion) to represent the population of both rural and urban regions. Objective measures included aerobic fitness, physical activity (PA), sedentary behavior, sleep, body composition, blood pressure, grip strength, and blood values. Subjective measures included self-reported mental and physical health, sleep, social functioning, PA, education, living arrangements, nutrition, and alcohol and nicotine use. IBM SPSS Statistics, 29.0 Iceland Iceland