By Dr Katya Numbers

Journal articles

Tan I; Schutte AE; Morgan C; Brodaty H; Gnanenthiran SR; Numbers K; Liu H; Ouyang M; Incerti P; Kitterick P; Sharma M, 2026, 'Listen to Your Heart and Mind: A Pilot Mixed-Methods Study on Combined Screening for Raised Blood Pressure, Atrial Fibrillation, Cognitive Impairment and Hearing Loss in Older Adults', Australasian Journal on Ageing, 45, http://dx.doi.org/10.1111/ajag.70243

Sabatini S; Rupprecht FS; Mroz E; Turner S; Capithorne Crainey R; Tang EYH; Burley CV; Dunne J; Burton E; Wong S; Wilton-Harding B; Windsor T; Ambagtsheer RC; Numbers K; Stephan B, 2026, 'Cross-Sectional Associations Between Personal and General Views on Aging and Future Care Preparation in Individuals Aged 50 and Over and Living in the United Kingdom', Journal of Applied Gerontology, 45, pp. 2235 - 2246, http://dx.doi.org/10.1177/07334648251398098

McEwen K; Samtani S; Chen R; Crawford JD; Sachdev PS; Brodaty H; Numbers K, 2026, 'Incident dementia risk by frailty status and living arrangements in older adults', Journal of Frailty and Aging, 15, http://dx.doi.org/10.1016/j.tjfa.2026.100185

Zhang C; Vella AS; Chander RJ; Brodaty H; Sachdev PS; Numbers K, 2026, 'Combined Influence of Subjective Cognitive Complaints and Neuropsychiatric Symptoms on Cognitive Trajectories in Older Adults', Brain Sciences, 16, http://dx.doi.org/10.3390/brainsci16070693

Hopkins EG; Leman PJ; Cervin M; Numbers K; Brodaty H; Sachdev PS; Medvedev ON, 2026, 'Network of positive affect and depression in older adults: Twin study', Journal of Psychiatric Research, 197, pp. 321 - 329, http://dx.doi.org/10.1016/j.jpsychires.2026.02.050

Chalmers RA; Cervin M; Choo C; Numbers K; Mather KA; Brodaty H; Kochan NA; Sachdev PS; Medvedev ON, 2026, 'Machine learning models for dementia risk prediction: evidence from the Sydney Memory and Ageing Study', npj Dementia, 2, pp. 27, http://dx.doi.org/10.1038/s44400-026-00071-1

Idrus M; Bliuc D; Mather KA; Brodaty H; Sachdev PS; Numbers K; Dai Z, 2026, 'Fermented Dairy Food Intake and Risk of Depression and Dementia in Later Life: Findings from a Prospective Cohort of Older Australians', Nutrients, 18, http://dx.doi.org/10.3390/nu18071020

Chalmers RA; Cervin M; Choo C; Numbers K; Mather KA; Brodaty H; Kochan NA; van den Top E; Krägeloh CU; Sachdev PS; Medvedev ON, 2026, 'Beyond biology: Physical and mental health predictors of mortality in the sydney memory and ageing study', Journal of Psychiatric Research, 193, pp. 216 - 222, http://dx.doi.org/10.1016/j.jpsychires.2025.11.033

Hopkins EG; Leman PJ; Cervin M; Numbers K; Brodaty H; Sachdev PS; Medvedev ON, 2026, 'Network of positive affect and depression in older adults', Journal of Affective Disorders, 394, http://dx.doi.org/10.1016/j.jad.2025.120529

Connors MH; Sachdev PS; Teixeira-Pinto A; Crawford JD; Numbers K; Draper B; Kochan NA; Brodaty H, 2026, 'Cognition and other determinants of wellbeing in old age: a 12 year longitudinal study', Aging and Mental Health, 30, pp. 1819 - 1830, http://dx.doi.org/10.1080/13607863.2026.2643895

Kelly J; Dickins M; Mackelprang JL; Numbers K; Bhar S; Schofield P; Davison TE, 2026, 'Late-life depression training for in-home aged care staff: A mixed-methods pilot study', Educational Gerontology, http://dx.doi.org/10.1080/03601277.2026.2675408

Lin PH; Wesson J; Tanvir M; Numbers KT; Reppermund S, 2025, 'Clinical Manifestations', Alzheimer S Dementia the Journal of the Alzheimer S Association, 21, pp. e106194, http://dx.doi.org/10.1002/alz70857_106194

Numbers KT; Ee N; Lim M; Samtani S; Peters R; Sparks A; Anstey KJ, 2025, 'Dementia Care Research and Psychosocial Factors', Alzheimer S Dementia the Journal of the Alzheimer S Association, 21, pp. e105346, http://dx.doi.org/10.1002/alz70858_105346

Numbers KT; Lam BCP; Samtani S; Chander RJ; Vella AS; Sachdev PS; Brodaty H, 2025, 'Increased Worry Associated with Self-Reported, but Not Informant-Reported, Subjective Cognitive Decline Predicts Increased Risk of Incident Dementia', Diagnostics, 15, http://dx.doi.org/10.3390/diagnostics15233073

Samtani S; Mahalingam G; Lam BCP; Lipnicki DM; Numbers K; Lima-Costa MF; Blay SL; Costa EC; Xiao S; Reidel-Heller S; Röhr S; Pabst A; Scarmeas N; Yannakoulia M; Kosmidis M; Krishna M; Kumaran K; Shahar S; Ng TP; Ho R; Kim KW; Skoog I; Najar J; Sterner TR; Ganguli M; Chang CCH; Hughes TF; Sachdev PS; Brodaty H, 2025, 'Emotional and instrumental social support and older adults' depressive symptoms: collaborative individual participant data meta-analysis of 11 population-based studies of aging', American Journal of Epidemiology, 194, pp. 3041 - 3049, http://dx.doi.org/10.1093/aje/kwaf137

Numbers K; Samtani S; Hanewald K; Cheung J; Sachdev PS; Brodaty H, 2025, 'Intrinsic Capacity Predictors of Dementia and Mortality in the Sydney Memory and Ageing Study', International Journal of Geriatric Psychiatry, 40, http://dx.doi.org/10.1002/gps.70156

Sabatini S; Numbers K; Kochan NA; Sachdev PS; Brodaty H, 2025, 'Associations between Attitudes to Aging with concurrent and twelve-year change in cognitive functioning in very old individuals', International Psychogeriatrics, 37, http://dx.doi.org/10.1016/j.inpsyc.2025.100045

Loyal MS; Numbers K; Reppermund S; Brodaty H; Sachdev PS; Mewton L; Jiang J; Lam BCP, 2025, 'Longitudinal associations between late-life depression, cerebrovascular disease and cognition', Journal of Affective Disorders, 376, pp. 59 - 67, http://dx.doi.org/10.1016/j.jad.2025.01.147

Sawang J; Numbers K; Lam BCP; Reppermund S, 2025, 'Relationships Between Functional Impairment, Depressive Symptoms, and Ageing Attitudes in Older Adults', Diagnostics, 15, http://dx.doi.org/10.3390/diagnostics15091145

Chander RJ; Numbers K; Grainger SA; Cleary R; Mather KA; Kochan NA; Brodaty H; Henry JD; Sachdev PS, 2025, 'Differential Social Cognitive Performance in Older Adults With Mild Cognitive Impairment and Dementia', American Journal of Geriatric Psychiatry, 33, pp. 248 - 259, http://dx.doi.org/10.1016/j.jagp.2024.08.008

Chen J; Numbers K; Lo J; Sachdev PS; Kochan NA; Crawford JD; Brodaty H, 2025, 'Do changed behaviors predict cognitive decline in a community sample?', International Psychogeriatrics, http://dx.doi.org/10.1016/j.inpsyc.2025.100076

Sabatini S; Numbers K; Kochan NA; Sachdev PS; Brodaty H, 2025, 'Levels and changes in cognitive, mental, and physical health as correlates of attitudes to aging in very old age', Frontiers in Psychiatry, 16, http://dx.doi.org/10.3389/fpsyt.2025.1567754

Ginige JA; Rana K; Belcastro M; Gunaratne P; Lillis S; Numbers KT; Lin PH; Nguyen K; Tanvir M; Reppermund S, 2025, 'Technical development and user experience evaluation of the Computerised version of the Sydney Test of Activities of daily living in Memory disorders (C-STAM)', Frontiers in Digital Health, 7, http://dx.doi.org/10.3389/fdgth.2025.1637916

Xu X; Catts VS; Harris K; Wang N; Numbers K; Trollor J; Brodaty H; Sachdev PS; Schutte AE, 2024, 'The contribution of cumulative blood pressure load to dementia, cognitive function and mortality in older adults', Journal of Hypertension, 42, pp. 1922 - 1931, http://dx.doi.org/10.1097/HJH.0000000000003808

Stemmler M; Arnold M; Numbers K; Kochan NA; Sachdev PS; Brodaty H, 2024, 'The Usefulness of the Regression-Based Normed SKT Short Cognitive Performance Test in Detecting Cognitive Impairment in a Community Sample', Diagnostics, 14, http://dx.doi.org/10.3390/diagnostics14192199

Fongang B; Sargurupremraj M; Jian X; Mishra A; Damotte V; de Rojas I; Skrobot O; Bis JC; Fan KH; Jacobsen E; Li GHY; Yang J; Alessandra B; Alessandra L; Hilal S; Chong JR; Chai YL; Knol MJ; Concas MP; Giorgia G; Riaz M; Yu C; Guojonsson A; Lacaze P; Naj AC; Gireud-Goss M; Wadop YN; Soumare A; Bouteloup V; Gudnason V; Battista P; Santin A; Spedicati B; Sardone R; Launer L; Bressler J; Gottesman RF; Grand QL; Caro I; Roshchupkin GV; Leonard HL; Yang C; Bartz TM; Bordes C; Ridker PM; Geerlings MI; Gasca NC; Manichaikul A; Nalls MA; Rich SS; Schmidt CO; Trompet S; van Setten J; van Vugt M; Grabe HJ; Jukema JW; Rissanen IL; Wassertheil-Smoller S; Ikram MA; Simonsick EM; Longstreth WT; Chasman DI; Rotter JI; Sattar N; Stott DJ; Shiroma EJ; Sigurdsson S; Ghanbari M; Schminke U; Boerwinkle E; Aparicio HJ; Beiser AS; Romero JR; Lioutas V; Wang R; Sarnowski C; Teumer A; Völker U; Mosley TH; Marquié M; García-González P; Olivé C; Puerta R; Cano A; Sotolongo-Grau O; Valero S; Pytel VV; Rosende-Roca M; Alegret M; Tàrraga L; Boada M; Carracedo Á; Franco-Macías E; Piñol-Ripoll G; Garcia-Ribas G; Pérez-Tur J; Royo JL; García-Alberca JM; Real LM; Sáez ME, 2024, 'A genome-wide association meta-analysis of all-cause and vascular dementia', Alzheimer S and Dementia, 20, pp. 5973 - 5995, http://dx.doi.org/10.1002/alz.14115

Bilgrami A; Aghdaee M; Gu Y; Cutler H; Numbers K; Kochan NA; Sachdev PS; Brodaty H, 2024, 'Patterns in health care use and intensity for diagnosed and undiagnosed cognitive impairment in the older australian community: Implications for primary care management', Ssm Population Health, 27, http://dx.doi.org/10.1016/j.ssmph.2024.101693

Zhang LL; Numbers K; Brodaty H; Lam BCP; Mahalingam G; Reppermund S, 2024, 'Does Mild Functional Impairment Predict Dementia in Older Adults with Normal Cognition?', Alzheimer Disease and Associated Disorders, 38, pp. 257 - 264, http://dx.doi.org/10.1097/WAD.0000000000000638

Truong QC; Choo C; Numbers K; Merkin AG; Sachdev PS; Feigin VL; Brodaty H; Kochan NA; Medvedev ON, 2024, 'Enhancing precision of the 16-item Informant Questionnaire on Cognitive Decline in the Elderly (IQCODE-16) using Rasch methodology', International Psychogeriatrics, 36, pp. 166 - 176, http://dx.doi.org/10.1017/S1041610221002568

Truong QC; Cervin M; Choo CC; Numbers K; Bentvelzen AC; Kochan NA; Brodaty H; Sachdev PS; Medvedev ON, 2024, 'Examining the validity of the Mini-Mental State Examination (MMSE) and its domains using network analysis', Psychogeriatrics, 24, pp. 259 - 271, http://dx.doi.org/10.1111/psyg.13069

Kalam S; Numbers K; Lipnicki DM; Lam BCP; Brodaty H; Reppermund S, 2024, 'The combination of olfactory dysfunction and depression increases the risk of incident dementia in older adults', International Psychogeriatrics, 36, pp. 130 - 141, http://dx.doi.org/10.1017/S1041610223000480

Litkouhi PN; Numbers K; Valenzuela M; Crawford JD; Lam BCP; Litkouhi PN; Sachdev PS; Kochan NA; Brodaty H, 2024, 'Critical periods for cognitive reserve building activities for late life global cognition and cognitive decline: the Sydney memory and aging cohort study', Aging Neuropsychology and Cognition, 31, pp. 387 - 403, http://dx.doi.org/10.1080/13825585.2023.2181941

Chan LLY; Delbaere K; Numbers K; Lam B; Menant J; Sturnieks DL; Trollor JN; Brodie MA; Lord SR, 2024, 'Poor mobility and lower limb weakness are associated with three distinct depressive symptom trajectories over 6 years in older people', Australasian Journal on Ageing, http://dx.doi.org/10.1111/ajag.13273

Chakraborty M; Dhiman K; Sachdev PS; Brodaty H; Draper B; Trollor JN; Reppermund S; Kang K; Mather KA; Poljak A; Wen W; Numbers KT; Kochan NA; Catts VS; Gupta V, 2024, 'Glutaric acid associates with early detection of cognitive impairment deciphering the association with depression', Alzheimer's & Dementia, 20, pp. e088825, http://dx.doi.org/10.1002/alz.088825

Chander RJ; Numbers KT; Chen R; Samtani S; Kochan NA; Brodaty H; Sachdev PS, 2024, 'Social, environmental, and cognitive correlates of community‐dwelling older adults coping poorly with reduced social contact: A quasi‐experiment set in Australia’s COVID‐19 lockdown in 2020', Alzheimer's & Dementia, 20, pp. e092104, http://dx.doi.org/10.1002/alz.092104

Yan VYX; Numbers K; Sachdev PS; Brodaty H; Medvedev ON, 2023, 'Application of generalizability theory to evaluate the Kessler Psychological Distress Scale and distinguish between enduring and dynamic distress', Journal of Affective Disorders Reports, 14, pp. 100668, http://dx.doi.org/10.1016/j.jadr.2023.100668

Mahalingam G; Samtani S; Lam BCP; Lipnicki DM; Lima-Costa MF; Blay SL; Castro-Costa E; Shifu X; Guerchet M; Preux PM; Gbessemehlan A; Skoog I; Najar J; Sterner TR; Scarmeas N; Yannakoulia M; Dardiotis T; Kim KW; Riedel-Heller S; Röhr S; Pabst A; Shahar S; Numbers K; Ganguli M; Hughes TF; Chang CCH; Crowe M; Ng TP; Gwee X; Chua DQL; Rymaszewska J; Wolf-Ostermann K; Welmer AK; Stafford J; Mélis R; Vernooij-Dassen M; Jeon YH; Sachdev PS; Brodaty H; Roehr S, 2023, 'Social connections and risk of incident mild cognitive impairment, dementia, and mortality in 13 longitudinal cohort studies of ageing', Alzheimer S and Dementia, 19, pp. 5114 - 5128, http://dx.doi.org/10.1002/alz.13072

Truong QC; Cervin M; Choo CC; Numbers K; Bentvelzen AC; Merkin AG; Sachdev PS; Feigin VL; Brodaty H; Kochan NA; Medvedev ON, 2023, 'Using network analysis to validate domains of the modified telephone interview for cognitive status', European Journal of Clinical Investigation, 53, pp. e14016, http://dx.doi.org/10.1111/eci.14016

Gong J; Harris K; Lipnicki DM; Castro-Costa E; Lima-Costa MF; Diniz BS; Xiao S; Lipton RB; Katz MJ; Wang C; Preux PM; Guerchet M; Gbessemehlan A; Ritchie K; Ancelin ML; Skoog I; Najar J; Sterner TR; Scarmeas N; Yannakoulia M; Kosmidis MH; Guaita A; Rolandi E; Davin A; Gureje O; Trompet S; Gussekloo J; Riedel-Heller S; Pabst A; Röhr S; Shahar S; Singh DKA; Rivan NFM; Boxtel MV; Köhler S; Ganguli M; Chang CC; Jacobsen E; Haan M; Ding D; Zhao Q; Xiao Z; Narazaki K; Chen T; Chen S; Ng TP; Gwee X; Numbers K; Mather KA; Scazufca M; Lobo A; De-la-Cámara C; Lobo E; Sachdev PS; Brodaty H; Hackett ML; Peters SAE; Woodward M; Roehr S, 2023, 'Sex differences in dementia risk and risk factors: Individual-participant data analysis using 21 cohorts across six continents from the COSMIC consortium', Alzheimer S and Dementia, 19, pp. 3365 - 3378, http://dx.doi.org/10.1002/alz.12962

Calkin CJ; Numbers K; Brodaty H; Sachdev PS; Medvedev ON, 2023, 'Measuring distress in older population: Rasch analysis of the Kessler Psychological Distress Scale', Journal of Affective Disorders, 330, pp. 117 - 124, http://dx.doi.org/10.1016/j.jad.2023.02.116

Hopkins EG; Leman PJ; Cervin M; Numbers K; Brodaty H; Kochan NA; Sachdev PS; Medvedev ON, 2023, 'Network of mental activities, cognitive function and depression in older men and women', Journal of Psychiatric Research, 162, pp. 113 - 122, http://dx.doi.org/10.1016/j.jpsychires.2023.05.030

Truong QC; Choo C; Numbers K; Bentvelzen A; Merkin AG; Brodaty H; Kochan NA; Feigin VL; Sachdev PS; Medvedev ON, 2023, 'Enhancing Precision of the Telephone Interview for Cognitive Status–Modified (TICS-M) Using the Rasch Model', Psychological Assessment, 35, pp. 559 - 571, http://dx.doi.org/10.1037/pas0001233

Truong QC; Numbers K; Choo CC; Bentvelzen AC; Catts VS; Cervin M; Jorm AF; Kochan NA; Brodaty H; Sachdev PS; Medvedev ON, 2023, 'Establishing conversion of the 16-item Informant Questionnaire on Cognitive Decline in the Elderly scores into interval-level data across multiple samples using Rasch methodology', Psychogeriatrics, 23, pp. 411 - 421, http://dx.doi.org/10.1111/psyg.12946

Selwood AE; Catts VS; Numbers K; Lee T; Thalamuthu A; Wright MJ; Sachdev PS, 2023, 'The Heritability of Subjective Cognitive Complaints in Older Australian Twins', Journal of Alzheimer’s Disease, 92, pp. 1015 - 1026, http://dx.doi.org/10.3233/jad-221008

Sprague BN; Zhu X; Rosso AL; Verghese J; Delbaere K; Lipnicki DM; Sachdev PS; Ng TP; Gwee X; Yap KB; Kim K-W; Han JW; Oh DJ; Narazaki K; Chen T; Chen S; Brodaty H; Numbers K; Kochan NA; Walker RW; Paddick S-M; Gureje O; Ojagbemi A; Bello T; Rosano C, 2023, 'Correlates of gait speed among older adults from six countries: Findings from the COSMIC collaboration.', The Journals of Gerontology Series A, http://dx.doi.org/10.1093/gerona/glad090

Numbers K; Lam BCP; Crawford JD; Kochan NA; Sachdev PS; Brodaty H, 2023, 'Longitudinal changes in participant and informant reports of subjective cognitive complaints are associated with dementia risk', Frontiers in Aging Neuroscience, 15, pp. 1044807, http://dx.doi.org/10.3389/fnagi.2023.1044807

Numbers KT, 2023, 'Increased worry associated with self‐reported, but not informant‐reported, subjective cognitive decline predicts risk of incident dementia', Alzheimer's & Dementia, 19, http://dx.doi.org/10.1002/alz.075634

Samtani S; Mahalingam G; Lam BCP; Lipnicki DM; Costa E; Lima‐Costa MF; Xiao S; Scarmeas N; Kim KW; Numbers KT; Ganguli M; Krishna M; Ng TP; Sachdev PS; Brodaty H; Skoog I; Riedel‐Heller SG; Shahar S; consortium CCAS, 2023, 'Types of social support and depressive symptoms in older adults: An IPD meta‐analysis of longitudinal ageing studies', Alzheimer's & Dementia, 19, http://dx.doi.org/10.1002/alz.074525

Truong QC; Choo C; Numbers K; Merkin AG; Brodaty H; Kochan NA; Sachdev PS; Feigin VL; Medvedev ON, 2022, 'Applying generalizability theory to examine assessments of subjective cognitive complaints: whose reports should we rely on - participant versus informant?', International Psychogeriatrics, 34, pp. 1023 - 1033, http://dx.doi.org/10.1017/S1041610221000363

Hou J; Hess JL; Armstrong N; Bis JC; Grenier-Boley B; Karlsson IK; Leonenko G; Numbers K; O’Brien EK; Shadrin A; Thalamuthu A; Yang Q; Andreassen OA; Brodaty H; Gatz M; Kochan NA; Lambert JC; Laws SM; Masters CL; Mather KA; Pedersen NL; Posthuma D; Sachdev PS; Williams J; Fan CC; Faraone SV; Fennema-Notestine C; Lin SJ; Escott-Price V; Holmans P; Seshadri S; Tsuang MT; Kremen WS; Glatt SJ, 2022, 'Polygenic resilience scores capture protective genetic effects for Alzheimer’s disease', Translational Psychiatry, 12, pp. 296, http://dx.doi.org/10.1038/s41398-022-02055-0

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