The purpose of this study was to provide an initial, exploratory view of loneliness in New Zealand’s long-term care facilities and its changes over time. Our study found that 6.43% of the latest cohort reported feelings of loneliness. Due to the heterogeneous nature of loneliness evaluation between studies and cohort composition, wide differences in prevalence are expected. This figure may in part reflect interRAI LTCF’s dichotomous treatment of loneliness and which only reflects residents’ state during a certain period. Even with this limitation, across international assessments, this still appears to be an extremely low value (Gardiner et al., 2020). A similarly low prevalence was reported among sampled long-term care residents in Auckland, New Zealand (Bogati & Pirret, 2021).
While we were unable to identify a significant association between loneliness and sex, it was more common in women than men. The literature suggests a complicated picture, but studies generally show a higher prevalence of loneliness for women; however, independent associations between sex and loneliness is often contradictory and dependent on the nature of analysis (Dahlberg et al., 2021; Jamieson et al., 2017).
Self-identified ethnicity was found to be a predictor of loneliness in our regression model. Māori and Pasifika respondents showed a significantly lower reported rate than Europeans. The observed ethnic distribution of loneliness could also be paralleled with a study by Jamieson et al. (2017) which found the highest prevalence of loneliness in home-care among Asians followed by Europeans and Māori, and then Pasifika; they also identified ethnicity as a factor of loneliness.
Studies have predominantly found age as having a positive or non-significant association with loneliness in older adults (Dahlberg et al., 2021). Our results showed the converse as we found younger age groups reported a significantly higher prevalence of loneliness than those 85+. However, research on this is not universal and certain studies do support our findings (Christina et al., 2005). A systematic review and meta-analysis by Gardiner et al. (2020) also found that studies with a lower mean age had a comparably higher prevalence of loneliness though this comes with some acute generalisation.
The results of this study show a statistically significant decrease in loneliness for Europeans and, likely as a result of their overwhelming makeup, the total cohort. Studies surrounding temporal trends of loneliness in older adults generally show a decreasing or unchanging relationship, contrary to popular perception (Jansson et al., 2020; Dykstra, 2009), which agrees with our findings. While the general decrease irrespective of ethnicity is encouraging, more work is needed to understand differences between ethnicities in this regard.
Significant regional differences in loneliness prevalence were also noted. Our study showed that Wairarapa DHB had the highest prevalence of loneliness which is consistent with findings from New Zealand’s home-care (Beere et al., 2019), and that West Coast DHB had the lowest prevalence. Interestingly, in the same year, Wairarapa and West Coast DHB also reported the highest and lowest percentage of long-term care facilities with vacancies, respectively, in New Zealand (Aged Care Funding and Service Models Review, 2018). This correspondence should be interpreted cautiously but may warrant future investigation.
The findings of this study help to provide insight into the prevalence, regional distribution, and associated demographic factors of loneliness in long-term care in New Zealand as well as its change over time. While the overall prevalence of loneliness reported was relatively low and found to have significantly decreased over time, this is likely an underestimation and the decrease was only reflected for Europeans. Efforts at intervention are still crucial to help mitigate and prevent loneliness’ adverse effects in old age.
4.1 Limitations
Several important limitations underlie the research that came as a consequence of using the BI tool. Potentially confounding factors such as participants’ cognitive and/or functional disabilities and mental health condition were not included in this study. These factors impact the generalisability of our findings. Another limitation was our inability to differentiate unique individuals; rather, we could only work with anonymised data. To ensure we were analysing unique individuals in our logistic regression analysis, we were only able to use the most recent cohort, providing a relatively small sample size for ethnic minority groups. There is also the possibility that the general decrease in loneliness was confounded by survivorship bias and/or a change in the cohort composition as we cannot determine the individuals we were analysing in each time interval. This means that while our temporal analysis was able to demonstrate that prevalence of loneliness decreased among those surveyed in long-term care facilities over time, we cannot make inference at the individual-level. The nature of the interRAI LTCF assessment, which treats loneliness as a dichotomous measure and reflects only the previous three days, may also result in an underestimation of the prevalence of loneliness in long-term care facilities. Finally, the cross-sectional nature of this research means no causal relationship can be determined.