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Poppe M, Duffy L, Marchant NL, Barber JA, Hunter R, Bass N, Minihane AM, Walters K, Higgs P, Rapaport P, Lang IA, Morgan-Trimmer S, Huntley J, Walker Z, Brodaty H, Kales HC, Ritchie K, Burton A, Wenborn J, Betz A, Cooper C. The APPLE Tree programme: Active Prevention in People at risk of dementia through Lifestyle, bEhaviour change and Technology to build REsiliEnce-randomised controlled trial. Trials 2022; 23:596. [PMID: 35883143 PMCID: PMC9315085 DOI: 10.1186/s13063-022-06557-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Accepted: 07/16/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Large-scale trials of multidomain interventions show that modifying lifestyle and psychological risk factors can slow cognitive decline. We aim to determine if a lower intensity, personally tailored secondary dementia prevention programme for older people with subjective or mild objective memory decline, informed by behaviour change theory, reduces cognitive decline over 2 years. METHODS A multi-site, single-blind randomised controlled trial recruiting 704 older adults at high dementia risk due to mild cognitive impairment (MCI) or subjective cognitive decline (SCD). Participants are randomised using 1:1 allocation ratio to the APPLE Tree intervention versus control arm (dementia prevention information), stratified by site. The intervention explores and implements strategies to promote healthy lifestyle, increase pleasurable activities and social connections and improve long-term condition self-management. Two facilitators trained and supervised by a clinical psychologist deliver ten, 1-h group video call sessions over 6 months (approximately every fortnight), video-call 'tea breaks' (less structured, facilitated social sessions) in intervening weeks and individual goal-setting phone calls every 2 weeks. From 6 to 12 months, participants meet monthly for 'tea breaks', with those not attending receiving monthly goal-setting phone calls. Participants receive a food delivery, pedometer and website access to cognitive training and information about lifestyle modification. Follow-ups for all outcome measures are at 12 and 24 months. The primary outcome is cognition (Neuropsychological Test Battery (NTB) score) at 24 months. Secondary outcomes are quality of life, cost per quality-adjusted life year (QALY) and wellbeing and lifestyle factors the intervention targets (diet, vascular risk, body weight, activity, sleep, anxiety, depression, social networks and loneliness, alcohol intake and smoking). Participants from purposively selected sites participate in qualitative process evaluation interviews, which will be analysed using thematic analytic methods. DISCUSSION If effective, the intervention design, involving remote delivery and non-clinical facilitators, would facilitate intervention roll-out to older people with memory concerns. TRIAL REGISTRATION ISRCTN17325135 . Registration date 27 November 2019.
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Affiliation(s)
- M Poppe
- UCL Division of Psychiatry, University College London, London, UK
| | - L Duffy
- UCL Division of Psychiatry, University College London, London, UK
| | - N L Marchant
- UCL Division of Psychiatry, University College London, London, UK
| | - J A Barber
- Department of Statistical Science, University College London, London, UK
| | - R Hunter
- Research Department of Primary Care and Population Health, University College London, London, UK
| | - N Bass
- UCL Division of Psychiatry, University College London, London, UK
| | - A M Minihane
- Norwich Medical School, University of East Anglia, Norwich, UK
| | - K Walters
- Research Department of Primary Care and Population Health, University College London, London, UK
| | - P Higgs
- UCL Division of Psychiatry, University College London, London, UK
| | - P Rapaport
- UCL Division of Psychiatry, University College London, London, UK
| | - I A Lang
- College of Medicine and Health, University of Exeter, Exeter, UK
| | - S Morgan-Trimmer
- College of Medicine and Health, University of Exeter, Exeter, UK
| | - J Huntley
- UCL Division of Psychiatry, University College London, London, UK
| | - Z Walker
- UCL Division of Psychiatry, University College London, London, UK
| | - H Brodaty
- Centre for Healthy Brain Ageing, University of New South Wales, Sydney, Australia
| | - H C Kales
- Department of Psychiatry and Behavioral Sciences, University of California, Davis, Sacramento, USA
| | - K Ritchie
- Institut de Neurosciences de Montpellier (INM), Montpellier, France
| | - A Burton
- Department of Behavioural Science and Health, University College London, London, UK
| | - J Wenborn
- UCL Division of Psychiatry, University College London, London, UK
| | - A Betz
- Queen Mary University London, Centre for Psychiatry and Mental Health, Wolfson Institute for Population Health, London, UK
| | - C Cooper
- Queen Mary University London, Centre for Psychiatry and Mental Health, Wolfson Institute for Population Health, London, UK.
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Rusted JM, Sawyer R, Jones C, Trawley SL, Marchant NL. Positive effects of nicotine on cognition: the deployment of attention for prospective memory. Psychopharmacology (Berl) 2009; 202:93-102. [PMID: 18815772 DOI: 10.1007/s00213-008-1320-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2008] [Accepted: 08/25/2008] [Indexed: 11/30/2022]
Abstract
RATIONALE Human and animal studies over the last two decades report that nicotine can improve cognitive performance. Prospective memory (PM), the retrieval and implementation of a previously encoded intention, is also improved by pre-administration of nicotine. As with other nicotine effects, however, predicting precisely how and when nicotine improves the processes engaged by PM has proved less straightforward. OBJECTIVE We present two studies that explore the source of nicotine's enhancement of PM. Experiment 1 tests for effects of nicotine on preparatory attention (PA) for PM target detection. Experiment 2 asks whether nicotine enhances processing of the perceptual attributes of the PM targets. MATERIALS AND METHODS Young adult non-smokers matched on baseline performance measures received either 1 mg nicotine or matched placebo via nasal spray. Volunteers completed novel PM tasks at 15 min post-administration. RESULTS Experiment 1 confirmed that pre-administration of nicotine to non-smokers improved detection rate for prospective memory targets presented during an attention-demanding ongoing task. There was no relationship between PM performance and measures of preparatory attention. In experiment 2, salient targets were more likely to be detected than non-salient targets, but nicotine did not confer any additional advantage to salient targets. CONCLUSION The present study suggests that nicotinic stimulation does not work to enhance perceptual salience of target stimuli (experiment 2), nor does it work through better deployment of preparatory working attention (experiment 1). An alternative explanation that nicotine promotes PM detection by facilitating disengagement from the ongoing task is suggested as a future line of investigation.
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Affiliation(s)
- J M Rusted
- Department of Psychology, Sussex University, Brighton BN19QG, UK.
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