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Background: With urbanisation increasing, it is important to understand how to design changing environments to promote mental wellbeing. Evidence suggests that local-area proportions of green space may be associated with happiness and life satisfaction; however, the available evidence on such associations with more broadly defined mental wellbeing in still very scarce. This study aimed to establish whether the amount of neighbourhood green space was associated with mental wellbeing.Methods: Data were drawn from Understanding Society, a national survey of 30,900 individuals across 11,096 Census Lower-Layer Super Output Areas (LSOAs) in England, over the period 2009-2010. Measures included the multi-dimensional Warwick-Edinburgh Mental Well-Being Scale (SWEMWBS) and LSOA proportion of green space, which was derived from the General Land Use Database (GLUD), and were analysed using linear regression, while controlling for individual, household and area-level factors.Results: Those living in areas with greater proportions of green space had significantly higher mental wellbeing scores in unadjusted analyses (an expected increase of 0.17 points (95% CI 0.11, 0.23) in the SWEMWBS score for a standard deviation increase of green space). However, after adjustment for confounding by respondent sociodemographic characteristics and urban/rural location, the association was attenuated to the null (regression coefficient B = - 0.01, 95% CI -0.08, 0.05, p = 0.712).Conclusions: While the green space in an individual's local area has been shown through other research to be related to aspects of mental health such as happiness and life satisfaction, the association with multidimensional mental wellbeing is much less clear from our results. While we did not find a statistically significant association between the amount of green space in residents' local areas and mental wellbeing, further research is needed to understand whether other features of green space, such as accessibility, aesthetics or use, are important for mental wellbeing. [ABSTRACT FROM AUTHOR]

• This study highlights the complicated interactions between multimorbidity, functional ability and the environment. • For the very old living with multimorbidity, proximity to local grocery shops supports their ability to do grocery shopping. • Proximity to local grocery shops is less important for the healthy very old living with none or one chronic condition. • Future research should investigate how to support older people with poor health to overcome barriers to access local shops. The very old, people aged ≥85, is a fast-growing age group with high risk of disability and dependence. To identify environmental factors that support maintenance of functional ability, the aim of this study is to investigate the longitudinal associations between proximity to local grocery shops and the ability to shop for groceries in the very old and to examine the potential variation between those living with and without multimorbidity. This study was based on the Newcastle 85+ study, a population-based cohort of people aged 85 in North-East England. The numbers of grocery shops were identified within a 500 m road distance to participants' residence. Multilevel Poisson regression modelling was used to investigate whether proximity to local grocery shops was associated with the ability to do grocery shopping over five years in those with and without multimorbidity adjusting for sociodemographic factors and area deprivation. The very old who lived in more deprived areas were more likely to have a grocery shop within 500 m than those in less deprived areas. Proximity to local grocery shops was not associated with the ability to do grocery shopping in the participants who had none or one chronic condition (IRR: 1.00; 95% CI: 0.89, 1.12) but moderated loss of the ability in those living with multimorbidity (IRR: 0.82; 95% CI: 0.70, 0.96). For the very old living with multimorbidity, proximity to local grocery shops may support their functional ability. Future research should investigate how to support older people with poor health to access local grocery shops. [ABSTRACT FROM AUTHOR]