- Title
- Cohort Profile Update: The 45 and Up Study
- Creator
- Bleicher, Kerrin; Summerhayes, Richard; Baynes, Sarah; Swarbrick, Michael; Navin Cristina, Tina; Luc, Hans; Dawson, Greer; Cowle, Alison; Dolja-Gore, Xenia; McNamara, Martin
- Relation
- International Journal of Epidemiology Vol. 52, Issue 1, p. E92-E101
- Publisher Link
- http://dx.doi.org/10.1093/ije/dyac104
- Publisher
- Oxford University Press
- Resource Type
- journal article
- Date
- 2022
- Description
- The 45 and Up Study (‘the Study’) was developed to enhance population health. The Study provides researchers with reliable data on a wide range of exposures and outcomes of public health importance for the ageing population. The original 45 and Up Study profile paper was published in 2008 in the early stage of recruitment, describing the recruitment process and characteristics of the first 36 645 (14%) participants.1 The present paper profiles the final cohort of 267 357 men and women enrolled from the general population of New South Wales (NSW) and includes Study updates. Sampling and study design for the 45 and Up Study were described in Banks et al.1 Briefly, between 2005 and 2009, individuals aged ≥45 years and residing in NSW were randomly sampled from the Services Australia (formerly the Health Insurance Commission) Medicare enrolment database (MEDB) if they had received medical care within the previous 2 years. MEDB includes all citizens and permanent residents. Residents aged ≥80 years and those living in rural and remote areas were oversampled. Eligible people could also volunteer for the Study. Eligible individuals were mailed an invitation, an information leaflet, the Study questionnaire, a consent form and a reply-paid envelope. Participants who completed the questionnaire and provided signed consent to join the Study and have their survey data linked to a broad range of other data sources were enrolled in the Study. In addition, participants consented to being contacted for 5-yearly follow-up surveys and other research projects. A total of 1 395 174 invitations were mailed and 267 357 participants enrolled. Participants aged ≥80 years and those living in regional and remote areas were oversampled. The response rate was ≥19.2% (95% CI 19.18–19.22) and included ∼11% of the NSW population aged ≥45 years. The exact response rate may be higher as some people who were selected to participate may not have received any material due to an out-of-date address in the MEDB. The final cohort included 265 821 (99.4%) people who joined the Study by invitation and 1536 (0.6%) who heard about the Study and volunteered independently of the invitation.
- Subject
- healthcare; ageing; health; survey
- Identifier
- http://hdl.handle.net/1959.13/1481432
- Identifier
- uon:50726
- Identifier
- ISSN:0300-5771
- Language
- eng
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