ClinicalTrials.gg
RecruitingNCT07875998AD-BBMUpdated Oct 15, 2026

Study on Clinical Characteristics of Patients With Probable Alzheimer's Dementia Stratified by Blood Biomarkers

An observational study in Alzheimer's Disease Dementia, sponsored by Tianjin Anding Hospital. Recruiting at 1 site in China. Open to participants aged 55 Years to 90 Years. Per ClinicalTrials.gov, last updated 2026-10-15.

Sponsored by Tianjin Anding Hospital · Observational

From the registry’s dates

  • Started Jan 2026; still recruiting 9 months later.
Updated Oct 15, 2026Newly registeredGo to Updates ↓
Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
200
Ages
55 Years to 90 Years
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 260 studies in Alzheimer Disease with a site in China — 150 open to participants now, 162 under way, 21 of them phase 3. Alzheimer Disease · China.

Planned enrollment
63rd of 84
200 · median 566
Started
2026
with 35 others
Observational
84 of 260
56 open now
Primary completion
2029-12
later than 140 of 161 live
Registered
249th of 260
by date

Among the 260 studies in Alzheimer Disease with a site in China, this one is the 63rd largest by planned enrollment of the 84 observational ones, is one of 36 that started in 2026, is one of 84 observational ones, reaches primary completion later than 140 of the 161 other live ones, and was the 249th registered.

By phase

260 studies; the count open now beside each. This study's row is marked.

Observationalthis study84 · 56 open
No phase78 · 47 open
Phase 333 · 15 open
Phase 126 · 18 open
Phase 220 · 7 open
Phase 411 · 4 open
Phase 1/25 · 2 open
Phase 2/33 · 1 open

By the year they started

First in 2000; this study’s year is marked. 36 started in 2026.

Size and results

Median enrollment 100 across the 176 interventional studies, 566 across the 84 observational. Of the 65 that completed or were terminated, 16 (25%) have results posted.

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02

Study summary

This is a prospective, observational cohort study. The primary objective is to characterize the clinical features and mechanisms of behavioral and psychological symptoms of dementia (BPSD) in patients with probable Alzheimer's disease (AD) who are plasma p-Tau217 negative, and to compare them with p-Tau217-positive patients. After grouping participants by an authoritative p-Tau217 cutoff value, the negative and positive groups will be systematically compared across all 12 domains of the Neuropsychiatric Inventory (NPI). Participants will be followed up at 6, 12, and 18 months to compare the incidence of cognitive decline, new-onset severe BPSD (hallucinations, agitation/aggression, depression, etc.), cerebrovascular events, and hospitalization between the two groups. As an exploratory objective, baseline BPSD domains combined with imaging (white matter hyperintensity burden) and blood biomarkers (NfL, IL-6, GFAP, etc.) will be used to construct a simple prognostic risk-stratification model within the negative group and to validate its predictive performance. The study aims to improve the recognition of non-AD-driven dementia with overlapping clinical presentations, thereby informing clinical management and care planning in the era of biology-based AD diagnosis.

Read the detailed description

This is a prospective observational study conducted at Tianjin Anding Hospital. A total of patients with probable Alzheimer's disease will be enrolled over a 3-year recruitment period. Participants will be stratified into p-Tau217-negative, p-Tau217-positive and grey-zone groups according to validated plasma p-Tau217 cut-off values. Baseline assessments include demographic data, physical examination, neuropsychological scales such as MMSE, MoCA, NPI, CDR, ADL, CBI and CGI, as well as brain MRI and Aβ-PET imaging. Peripheral blood samples will be collected for detection of Aβ42, Aβ40, Aβ42/40 ratio, p-Tau217, NfL, GFAP and ApoE genotyping. Subjects will receive routine clinical management without restricted study-specific medications, and follow-up evaluations will be performed at 6-, 12- and 18-month time-points. The primary objective is to compare differences across all 12 dimensions of the Neuropsychiatric Inventory (NPI) between p-Tau217-negative and p-Tau217-positive groups, and to compare the incidence of cognitive decline, new-onset severe behavioral and psychological symptoms of dementia (BPSD), cerebrovascular events and hospitalizations during follow-up. The exploratory objective is to develop a simple prognostic risk stratification model combining baseline BPSD profiles, white-matter hyperintensity burden on imaging and blood biomarkers including NfL, IL-6 and GFAP among p-Tau217-negative participants, with subsequent validation required for this exploratory analysis. Eligible participants are aged 50-90 years, meeting 2011 NIA-AA criteria for probable Alzheimer's disease dementia, with MMSE score \<24, CDR>0.5 and Hachinski Ischemic Scale ≤4. Subjects with other definite neurocognitive disorders, severe unstable systemic or neurological diseases will be excluded. This study has been approved by the Ethics Committee of Tianjin Anding Hospital. All participants or their legal guardians will provide written informed consent prior to any study-related procedures. All analyses will be performed based on collected longitudinal clinical, imaging and laboratory data.

03

Conditions studied

  • Alzheimer's Disease Dementia
04

Who can participate

Ages eligible
55 Years to 90 Years
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Non-probability sample

Study population

Meet the diagnostic criteria for probable Alzheimer's disease dementia (probable AD) proposed by the National Institute on Aging and Alzheimer's Association (2011 NIA-AA)

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. Aged between 50 and 90 years, without gender restriction;
  2. Meet the diagnostic criteria for probable Alzheimer's disease dementia (probable AD) proposed by the National Institute on Aging and Alzheimer's Association (2011 NIA-AA);
  3. (MMSE) score \< 24;
  4. Clinical Dementia Rating (CDR) score > 0.5;
  5. Hachinski Ischemic Scale score ≤ 4 (to exclude prominent vascular contributions);
  6. Understand the entire study procedure; written is obtained from participants or their legal guardians.

Exclusion criteria

Exclusion Criteria:

  1. Established diagnosis of vascular dementia, frontotemporal dementia, dementia with Lewy bodies, or neurocognitive disorders attributable to other etiologies;
  2. Concomitant definite neurological diseases;
  3. Presence of severe and unstable somatic diseases involving the respiratory, circulatory, immune, endocrine or other systems.
Terms in these criteria, in plain language(2)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

MMSE and MoCA

Short tests of memory and thinking, each scored out of 30. Lower scores suggest more difficulty; criteria give a range, either to include people with memory problems or to leave them out.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

05

Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
200 participants (estimated)
Patient registry
No

Groups and cohorts

  • study group

    1. Aged between 50 and 90 years, without gender restriction; 2. Meet the diagnostic criteria for probable Alzheimer's disease dementia (probable AD) proposed by the National Institute on Aging and Alzheimer's Association (2011 NIA-AA); 3. Mini-Mental State Examination (MMSE) score \< 24; 4. Clinical Dementia Rating (CDR) score \> 0.5;

06

What researchers measure

Primary outcomes

  1. Neuropsychiatric Inventory (NPI)

    The total score ranges from 0 to 144. Higher scores indicate more severe neuropsychiatric/behavioral symptoms (worse outcome).

    Time frame: 0Month、6Month、12Month、18Month

  2. Mini-Mental State Examination(MMSE)

    Score range: 0-30. Higher scores mean better outcome (better cognitive performance).

    Time frame: 0Month、6Month、12Month、18Month

  3. Montreal Cognitive Assessment(MoCA)

    Score range: 0-30. Higher scores mean better outcome (superior cognitive performance).

    Time frame: 0Month、6Month、12Month、18Month

07

Study locations

1 of 1 sites recruiting
  • Tianjin Anding Hospital,No. 13 Liulin Road, Hexi District, Tianjin, China
    Tianjin, Tianjin Municipality 300000, China
    Recruiting
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

1 registry update since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Started Jan 2026 (actual). Primary completion is estimated for Dec 2029, 47 months after the start.

Of 364 non-industry observational studies under Alzheimer Disease, half reached primary completion within 81 months of starting (the median), counting those still running; a quarter within 39 and three quarters within 203. This study's planned 47 months is below that.

Counting every sponsor, half of 405 studies reached it within 67 months; a quarter within 35 and three quarters within 171.

How these figures are worked out, and which studies are left out of them.

Registered
Sep 8, 2026
First posted
Oct 15, 2026
StartActual
Jan 31, 2026
Primary completionEst.
Dec 31, 2029
CompletionEst.
Dec 31, 2031
Last update
Oct 15, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
Registered
First appeared on the registry. No changes since
Oct 15, 2026
Show all 1 update
  1. Oct 15, 2026
    First appeared on the registry

From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗

10

Registry details

Key details

Study ID
NCT07875998
Lead sponsor
Tianjin Anding Hospital
Responsible party
Jie Li (Chief psychiatrist, Tianjin Anding Hospital) — Principal investigator
First posted
Oct 15, 2026
Start date
Jan 31, 2026
Primary completion
Dec 31, 2029 (estimated)
Completion
Dec 31, 2031 (estimated)
Last update
Oct 15, 2026

Study contacts

Fengfeng Bai, Doctor
Contact
lixue_cat860118@163.com
+86 88188156

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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