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Current neurocognitive batteries are time-consuming, and the few DL models predicting cognition require expensive multimodal neuroimaging and longitudinal data. Although magnetic resonance imaging (MRI) is the most clinically accessible modality, on its own it struggles to capture AD heterogeneity in modern DL frameworks. We propose a multitask DL strategy integrating domain knowledge with large pretrained models to predict cognitive scores using only baseline MRI and demographics. By customizing loss functions and leveraging tissue segmentation-tuned latent representations as regularization features, our approach bypasses the need for longitudinal, multimodal or specialized neuroimaging data. This knowledge-informed multitask framework produces accurate diagnosis, segmentation and both current and future cognitive scores from a single baseline scan, with broad implications for early diagnosis, prognosis and clinical trial design.<\/jats:p>","DOI":"10.1038\/s43587-026-01121-2","type":"journal-article","created":{"date-parts":[[2026,5,18]],"date-time":"2026-05-18T09:01:14Z","timestamp":1779094874000},"page":"1121-1137","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Predicting categorical and continuous Alzheimer\u2019s disease outcomes from a single MRI scan"],"prefix":"10.1038","volume":"6","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6234-2757","authenticated-orcid":false,"given":"Daren","family":"Ma","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christabelle","family":"Pabalan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Abhejit","family":"Rajagopal","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Akanksha","family":"Akanksha","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yannet","family":"Interian","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2841-4243","authenticated-orcid":false,"given":"Yang","family":"Yang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2414-2444","authenticated-orcid":false,"given":"Ashish","family":"Raj","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,5,18]]},"reference":[{"key":"1121_CR1","doi-asserted-by":"publisher","first-page":"210","DOI":"10.1001\/archneur.57.2.210","volume":"57","author":"LA Farrer","year":"2000","unstructured":"Farrer, L. 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