{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,10]],"date-time":"2026-09-10T08:29:52Z","timestamp":1789028992683,"version":"build-2803163510"},"reference-count":54,"publisher":"American Medical Association (AMA)","issue":"7","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JAMA Netw Open"],"abstract":"\n Importance<\/jats:title>\n Multidomain lifestyle interventions slow cognitive decline in at-risk older adults, but effects on cerebrovascular injury and whether any effect differs by age or across magnetic resonance imaging (MRI) markers remain unclear.<\/jats:p>\n <\/jats:sec>\n \n Objectives<\/jats:title>\n To test whether a structured multidomain lifestyle intervention, vs a self-guided program, alters trajectories of cerebrovascular MRI markers and whether baseline diffusion MRI estimates subsequent vascular injury.<\/jats:p>\n <\/jats:sec>\n \n Design, Setting, and Participants<\/jats:title>\n POINTER Imaging was a prespecified secondary imaging analysis of the US POINTER (US Study to Protect Brain Health Through Lifestyle Intervention to Reduce Risk) randomized clinical trial conducted at multiple US sites. Starting August 1, 2020, and continuing until March 1, 2023, all newly enrolled US POINTER trial participants who met criteria, including being 60 to 79 years of age and at increased risk for cognitive decline, were given the opportunity to enroll in POINTER Imaging. Annual MRIs were performed at baseline and up to 2 follow-up visits at 12 and 24 months. The imaging study ended May 14, 2025.<\/jats:p>\n <\/jats:sec>\n \n Interventions<\/jats:title>\n Structured multidomain lifestyle arm (supervised exercise, dietary counseling, cognitive and social engagement, and health coaching) vs self-guided educational arm.<\/jats:p>\n <\/jats:sec>\n \n Main Outcomes and Measures<\/jats:title>\n Primary outcomes were cerebrovascular MRI markers of global white matter free water (FW), fractional anisotropy (FA), peak width of skeletonized mean diffusivity (PSMD), analysis along the perivascular space (ALPS) index, white matter hyperintensity (WMH) volume, and incident cerebral microbleeds (CMBs). Age-group analyses (&amp;lt;70 vs \u226570 years) were prespecified. Linear mixed-effects models tested time, intervention arm, age group, and interactions for continuous outcomes; logistic regression evaluated incident CMBs. All analyses were adjusted for sex, hypertension, diabetes, and smoking and were conducted for the evaluable population. Data were analyzed September 5 to December 11, 2025.<\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n \n For 959 participants included in the analysis, the mean (SD) age was 68 (5) years, and 594 (61.9%) were female. A significant time\u2009\u00d7\u2009arm\u2009\u00d7\u2009age group interaction was observed for FW (\u03b2\u2009=\u20090.050; SE\u2009=\u20090.018;\n P<\/jats:italic>\n \u2009=\u2009.006). In participants younger than 70 years, the structured intervention, compared with the self-guided intervention, attenuated the FW increase over time (\u03b2\u2009=\u2009\u22120.031; SE\u2009=\u20090.012;\n P<\/jats:italic>\n \u2009=\u2009.009); no intervention arm difference was observed in participants aged 70 years or older (\u03b2\u2009=\u20090.019; SE\u2009=\u20090.014;\n P<\/jats:italic>\n \u2009=\u2009.18). No intervention-related interactions were detected (eg, time\u2009\u00d7\u2009intervention arm interaction) for WMH (\u03b2\u2009=\u20090.002; SE\u2009=\u20090.016;\n P<\/jats:italic>\n \u2009=\u2009.90), FA (\u03b2\u2009=\u20090.016; SE\u2009=\u20090.016;\n P<\/jats:italic>\n \u2009=\u2009.30), PSMD (\u03b2\u2009=\u2009\u22120.011; SE\u2009=\u20090.021;\n P<\/jats:italic>\n \u2009=\u2009.60), or ALPS (\u03b2\u2009=\u20090.006; SE\u2009=\u20090.021;\n P<\/jats:italic>\n \u2009=\u2009.79). Overall, greater odds of incident CMBs were associated with higher baseline FW (odds ratio, 1.63 [95% CI, 1.24-2.14];\n P<\/jats:italic>\n \u2009&amp;lt;\u2009.001) and PSMD (odds ratio, 1.40 [95% CI, 1.08-1.81];\n P<\/jats:italic>\n \u2009&amp;lt;\u2009.001). Greater WMH progression was associated with higher baseline FW (\u03b2\u2009=\u20090.014; SE\u2009=\u20090.006;\n P<\/jats:italic>\n \u2009=\u2009.02) and lower baseline FA (\u03b2\u2009=\u2009\u22120.018; SE\u2009=\u20090.006;\n P<\/jats:italic>\n \u2009=\u2009.004).\n <\/jats:p>\n <\/jats:sec>\n \n Conclusions and Relevance<\/jats:title>\n In this secondary imaging analysis of a randomized clinical trial, FW was the cerebrovascular MRI marker most responsive to lifestyle intervention in adults 60 to 70 years of age, showing attenuated small-vessel disease\u2013related injury. Findings suggested greater microvascular benefit when intensive lifestyle intervention is implemented earlier in late life.<\/jats:p>\n <\/jats:sec>\n \n Trial Registration<\/jats:title>\n \n ClinicalTrials.gov Identifier:\n NCT03688126<\/jats:ext-link>\n <\/jats:p>\n <\/jats:sec>","DOI":"10.1001\/jamanetworkopen.2026.20353","type":"journal-article","created":{"date-parts":[[2026,7,13]],"date-time":"2026-07-13T07:30:19Z","timestamp":1783927819000},"page":"e2620353","source":"Crossref","is-referenced-by-count":1,"title":["Age, Multidomain Lifestyle Intervention, and White Matter Integrity"],"prefix":"10.1001","volume":"9","author":[{"given":"Pauline","family":"Maillard","sequence":"first","affiliation":[{"name":"Department of Neurology, University of California, Davis"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Prashanthi","family":"Vemuri","sequence":"additional","affiliation":[{"name":"Department of Radiology, Mayo Clinic, Rochester, 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