Forskningsartikler

Bakgrunn
Antallet personer med demens forventes tredoblet innen 2050. Vi presenterer forekomsttall for demens og mild kognitiv svikt i Trondheim og viser hvordan vekting for frafall og bostatus påvirker forekomsttallene når vi sammenligner Trondheim med Nord-Trøndelag.
Materiale og metode
Personer i alderen 70 år og eldre i Trondheim ble invitert til å delta i helseundersøkelsen HUNT4 (den fjerde Helseundersøkelsen i Trøndelag) Trondheim 70+. Deltakerne ble intervjuet og gjennomgikk kognitiv testing. Et diagnoseteam satte diagnosene demens og mild kognitiv svikt. Frafallsvekter som justerte for utvalgsskjevheter, ble benyttet i sammenligningen av Trondheim og Nord-Trøndelag.
Resultater
Demensforekomsten i Trondheim ble estimert til 16,2 % for aldersgruppen 70 år og eldre etter vekting for skjevt frafall med henblikk på alder, kjønn, utdanning og andel sykehjemsbeboere. Ujustert demensforekomst var 21,0 % i Trondheim og 15,7 % i Nord-Trøndelag. Etter vekting ble forekomsten tilnærmet identisk i de to utvalgene.
Fortolkning
Å vekte for skjevt frafall har stor betydning for å få representative tall i forekomstundersøkelser av demens.
Hovedfunn
Forekomsten av demens og mild kognitiv svikt hos personer i alderen 70 år og eldre i Trondheim ble estimert til henholdsvis 16,2 % og 35,6 %.
Ujustert demensforekomst var 21,0 % for Trondheim og 15,7 % for Nord-Trøndelag, men etter vekting for skjevt frafall med hensyn til alder, kjønn, utdanning og sykehjem ble forekomsten tilnærmet identisk i de to utvalgene.

Linda Gjøra, Bjørn Heine Strand, Knut Engedal, Linda Ernstsen, Christian Myrstad, Håvard Skjellegrind, Pernille Thingstad, Geir Selbæk

Background: Observational tools can support the understanding of the complex needs of older people with dementia and aid delivery of person-centred care. However, existing tools are complex and resource intensive to use.

Objectives: To develop and evaluate the acceptability and feasibility of a low-resource, observational tool to support staff reflection and practice development.

Methods: Intervention development of the Person-Centred Observation and Reflection Tool (PORT) and acceptability and feasibility study, using surveys and focus groups in the UK, Norway and Spain.

Results: PORT was reported as easy, accessible and acceptable to use. The observation was identified as powerful for individual staff development and provided an evidence-based source for underpinning individualised care planning. Potential time challenges associated with implementation were identified.

Conclusion: Initial evaluation indicates PORT is an acceptable and feasible tool for use in health and social care settings for older people. Further research is needed on implementation models and the impacts of PORT use.

Implications for practice: PORT may be a useful tool to support individual staff development in care settings and person-centred care planning for people with dementia.

Claire Surr, Anne Marie Mork Rokstad, Josep Vila Miravent, Elena Fernandez, Aukje Post, Carol Fusek, Dawn Brooker

Background: Neuroinflammation is involved in the pathophysiology of Alzheimer’s disease (AD), including immune-linked genetic variants and molecular pathways, microglia and astrocytes. Multiple Sclerosis (MS) is a chronic, immune-mediated disease with genetic and environmental risk factors and neuropathological features. There are clinical and pathobiological similarities between AD and MS. Here, we investigated shared genetic susceptibility between AD and MS to identify putative pathological mechanisms shared between neurodegeneration and the immune system.

Methods: We analysed GWAS data for late-onset AD (N cases = 64,549, N controls = 634,442) and MS (N cases = 14,802, N controls = 26,703). Gaussian causal mixture modelling (MiXeR) was applied to characterise the genetic architecture and overlap between AD and MS. Local genetic correlation was investigated with Local Analysis of [co]Variant Association (LAVA). The conjunctional false discovery rate (conjFDR) framework was used to identify the specific shared genetic loci, for which functional annotation was conducted with FUMA and Open Targets.

Results: MiXeR analysis showed comparable polygenicities for AD and MS (approximately 1800 trait-influencing variants) and genetic overlap with 20% of shared trait-influencing variants despite negligible genetic correlation (rg = 0.03), suggesting mixed directions of genetic effects across shared variants. conjFDR analysis identified 16 shared genetic loci, with 8 having concordant direction of effects in AD and MS. Annotated genes in shared loci were enriched in molecular signalling pathways involved in inflammation and the structural organisation of neurons.

Conclusions: Despite low global genetic correlation, the current results provide evidence for polygenic overlap between AD and MS. The shared loci between AD and MS were enriched in pathways involved in inflammation and neurodegeneration, highlighting new opportunities for future investigation.

Vera Fominykh, Alexey A Shadrin, Piotr P Jaholkowski, Shahram Bahrami, Lavinia Athanasiu, Douglas P Wightman, Emil Uffelmann, Danielle Posthuma, Geir Selbæk, Anders M Dale, Srdjan Djurovic, Oleksandr Frei, Ole A Andreassen