000283077 001__ 283077 000283077 005__ 20251229160656.0 000283077 0247_ $$2doi$$a10.1002/alz70860_106340 000283077 0247_ $$2pmid$$apmid:41435182 000283077 0247_ $$2pmc$$apmc:PMC12726296 000283077 0247_ $$2ISSN$$a1552-5260 000283077 0247_ $$2ISSN$$a1552-5279 000283077 037__ $$aDZNE-2025-01484 000283077 041__ $$aEnglish 000283077 082__ $$a610 000283077 1001_ $$aBosch, Iris$$b0 000283077 1112_ $$aAlzheimer’s Association International Conference$$cToronto$$d2025-07-27 - 2025-07-31$$gAAIC 25$$wCanada 000283077 245__ $$aFrom zero to 6,000 in 9 months: Recruitment and innovation strategies for a remote longitudinal Alzheimer's population‐based screening study – Insights from the REAL AD study 000283077 260__ $$c2025 000283077 3367_ $$0PUB:(DE-HGF)1$$2PUB:(DE-HGF)$$aAbstract$$babstract$$mabstract$$s1767020675_31207 000283077 3367_ $$033$$2EndNote$$aConference Paper 000283077 3367_ $$2BibTeX$$aINPROCEEDINGS 000283077 3367_ $$2DRIVER$$aconferenceObject 000283077 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$mjournal 000283077 3367_ $$2DataCite$$aOutput Types/Conference Abstract 000283077 3367_ $$2ORCID$$aOTHER 000283077 520__ $$aThe REAL AD study aims to validate the diagnostic and prognostic performance of combining blood-based biomarkers and remote cognitive testing as a screening approach for early Alzheimer's disease (AD), leveraging an existing healthcare infrastructure in Western Sweden. Here, we discuss strategies for recruiting a large and representative cohort, demographics and participant retention during the first study phase, and evaluate the process of implementing innovations enabling a fully remote study design.In April 2024, a recruitment campaign was launched in collaboration with a PR company to recruit at least 3000 participants between 50-80 years from the general population. Through an online study platform, participants were enrolled and asked to answer health and lifestyle questionnaires (Step 1), guided to remotely administered cognitive testing (Step 2; using the neotivTrials app or Cognitron battery), and blood sampling at any of the 105 public regional primary care units (Step 3; Figure 1). Additionally, optional remote blood sampling complemented the primary study protocol.At abstract submission, N = 6092 participants (mean age=63.9 years, 70% female) were enrolled over a nine-month period, with recruitment ongoing for another month (Table 1). Retention rates for initial study steps were N = 4785 participants at Step 1, N = 3860 at Step 2, and N = 2491 at Step 3. These rates align with or exceed findings from a cross-study evaluation of retention in remote digital health studies (Pratap et al., 2020). Innovations enabling a fully remote study design were critical in achieving these recruitment and retention rates. However, attrition highlights challenges in maintaining engagement in remote study designs. Key innovations will be evaluated, focusing on: (1) an online study platform with secure authentication, (2) remote cognitive testing, (3) blood sampling via local healthcare providers, and (4) remote sample collection, all achieved through collaboration with relevant stakeholders. Structured feedback reports from participants will complement evaluations.REAL AD demonstrates the feasibility of implementing a large-scale, fully remote screening approach for early AD. Preliminary results highlight the effectiveness of key innovations and stakeholder collaboration, though attrition underlines the need to address engagement barriers. Future improvements and recommendations for other remote population-based screening initiatives will be discussed. 000283077 536__ $$0G:(DE-HGF)POF4-353$$a353 - Clinical and Health Care Research (POF4-353)$$cPOF4-353$$fPOF IV$$x0 000283077 588__ $$aDataset connected to CrossRef, PubMed, , Journals: pub.dzne.de 000283077 650_7 $$2NLM Chemicals$$aBiomarkers 000283077 650_2 $$2MeSH$$aHumans 000283077 650_2 $$2MeSH$$aFemale 000283077 650_2 $$2MeSH$$aMale 000283077 650_2 $$2MeSH$$aAged 000283077 650_2 $$2MeSH$$aMiddle Aged 000283077 650_2 $$2MeSH$$aAlzheimer Disease: diagnosis 000283077 650_2 $$2MeSH$$aAlzheimer Disease: blood 000283077 650_2 $$2MeSH$$aPublic Health 000283077 650_2 $$2MeSH$$aAged, 80 and over 000283077 650_2 $$2MeSH$$aBiomarkers: blood 000283077 650_2 $$2MeSH$$aSweden 000283077 650_2 $$2MeSH$$aNeuropsychological Tests 000283077 650_2 $$2MeSH$$aSurveys and Questionnaires 000283077 650_2 $$2MeSH$$aTelemedicine 000283077 650_2 $$2MeSH$$aPatient Selection 000283077 7001_ $$aLenér, Frida$$b1 000283077 7001_ $$aStankeviciute, Laura$$b2 000283077 7001_ $$aSingleton, Ellen Hanna$$b3 000283077 7001_ $$aÖhman, Fredrik$$b4 000283077 7001_ $$aQuitz, Kajsa$$b5 000283077 7001_ $$aDottori, Maria$$b6 000283077 7001_ $$0P:(DE-2719)2812972$$aBerron, David$$b7$$udzne 000283077 7001_ $$aFranzmeier, Nicolai$$b8 000283077 7001_ $$aKern, Silke$$b9 000283077 7001_ $$aZetterberg, Henrik$$b10 000283077 7001_ $$aBlennow, Kaj$$b11 000283077 7001_ $$aSchöll, Michael$$b12 000283077 773__ $$0PERI:(DE-600)2201940-6$$a10.1002/alz70860_106340$$gVol. 21 Suppl 6, no. 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