Journal Articles
Permanent URI for this collectionhttps://mro.massey.ac.nz/handle/10179/7915
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Item Lifestyle for brain health and cognitive functioning in midlife to early late-life New Zealanders: Utility of the LIBRA index.(John Wiley and Sons, Inc., 2024-05-01) Röhr S; Stephens C; Alpass FOBJECTIVES: There is enormous potential to improve brain health and reduce the risk of cognitive decline and dementia based on modifiable risk factors. The Lifestyle for Brain Health (LIBRA) index was developed to quantify modifiable dementia risk or room for brain health improvement. The objective of the study was to investigate the utility of the LIBRA index in relation to cognitive functioning in a midlife to early late-life sample of New Zealanders. METHODS: A subsample (n = 1001) of the longitudinal New Zealand Health, Work and Retirement (NZHWR) study completed face-to-face cognitive assessments using the 'Kiwi' Addenbrooke's Cognitive Examination-Revised (ACE-R) in 2010 and again in 2012, in addition to completing biennial NZHWR surveys on socioeconomic, health and wellbeing aspects. The LIBRA index was calculated incorporating information on 8 out of 12 modifiable health and lifestyle factors for dementia. Unadjusted and adjusted regression models and mixed effects models were used to inspect associations of LIBRA with cognitive functioning, cognitive impairment, and cognitive decline. RESULTS: The analytical sample (n = 881 [88.0%], after considering exclusion criteria and missing data) had a mean age of 63.1 (SD = 6.5) years, 53.3% were female, 26.2% were Māori, and 61.7% were highly educated. Higher LIBRA scores (indicating higher modifiable dementia risk) were associated with lower cognitive functioning (B = -0.33, 95% CI = -0.52;-0.15, p < 0.001) and a higher likelihood of cognitive impairment (OR = 1.22, 95% CI = 1.04; 1.42, p = 0.013), but did not predict cognitive decline over 2 years (B = -0.03, 95% CI = -0.22; 0.16, p = 0.766), adjusted for age, age2, gender, education, and ethnicity. CONCLUSIONS: The LIBRA index indicated promising utility for quantifying modifiable dementia risk in midlife and early late-life New Zealanders. For local use, refinement of the LIBRA index should consider cultural differences in health and lifestyle risk factors, and further investigate its utility with a wider range of modifiable factors over a longer observation period.Item Daytime fatigue as a predictor for subsequent retirement among older New Zealand workers(Elsevier Inc on behalf of National Sleep Foundation, 2021-12) Myllyntausta S; Gibson R; Salo P; Allen J; Gander P; Alpass F; Stephens CObjectives There is limited information on the role of fatigue on retirement, either independently or in association with poor sleep. The aim of this study was to examine the prospective association between daytime fatigue, measured as feeling tired or feeling worn out, independently and in relation to dissatisfaction with sleep, and subsequent retirement among 960 older workers in New Zealand. Methods Data from 2 consecutive surveys (2008 and 2010) of the New Zealand Health, Work, and Retirement Longitudinal Study were used. Poisson regression was used to investigate whether feeling tired and feeling worn out in 2008, along with dissatisfaction with sleep, were associated with self-reported retirement either due to health reasons or other reasons by 2010. Results The risk for retirement due to health reasons during a 2-year follow-up was 1.80-fold (95% confidence interval [CI] 1.16-2.45) among those who felt tired and 1.99-fold (95% CI 1.34-2.64) among those who felt worn out when compared to those not tired or not feeling worn out after adjusting for several sociodemographic, work characteristics and self-rated health. The risk for retirement due to health reasons was even higher when participant experienced both tiredness and feeling worn out. Dissatisfaction with sleep did not predict retirement due to health or other reasons. Conclusions Our results highlight that workers at risk of subsequent retirement due to health reasons may be identified with rather simple questions on tiredness and feeling worn out even among generally healthy older workers.Item Dataset comprising indices of healthy ageing among older New Zealand adults from the 2016-2018 waves of the Health, Work and Retirement longitudinal survey(Elsevier BV, 2020-08) Allen J; Alpass F; Stephens CThis article describes data utilised in article C. Stephens, J. Allen, N. Keating, A. Szabó, F. Alpass, Neighborhood environments and intrinsic capacity interact to affect health related quality of life of older people in New Zealand, Maturitas 139 (2020) 1-5. Data represent self-report responses to a longitudinal postal survey of health and ageing in Aotearoa New Zealand, conducted as part of the Health, Work and Retirement study. Respondents were derived from a large random sample of older adults drawn from a nationally representative sampling frame. Data were collected in 2016 (n = 4029 respondents) and with follow-up conducted in 2018 (n = 3207 respondents from 2016 wave; 79.6% response rate). The dataset comprises responses from all participants in the 2016 survey wave, including those that did not meet criteria for inclusion in the research article. Additional data on sensory impairments, depression, health behaviours, material resources, survey design and response weights are included to facilitate future research. The data article presents tables charting the longitudinal indicators related to the WHO definition of Healthy Ageing collected in the 2016 and 2018 omnibus surveys and made available in the dataset, as well as indicating those to be assessed in the 2020 survey wave. As work is ongoing to identify key domains and indices of Healthy Ageing, provision of these data with relevant materials, metadata and analyses scripts support current research findings, and enable use of these data in future research.