Evidence map›Paper›PMID 32973979›Full record

ArticleDementia & neuropsychologia

Subjective cognitive decline as a predictor of future cognitive decline: a systematic review.

Vladimir Anatolevich Parfenov, Vladimir Vladimirovich Zakharov, Anastasia Romanovna Kabaeva, Natalya Vasilyevna Vakhnina

Open access · diamondAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Dementia & neuropsychologia. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 68 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
68citing papers in PubMed, 4 pooled it
5.6field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

68 citing papers in PubMed, 4 syntheses or guidelines pooled it, 118 citations in OpenAlex.

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  14. Factors associated with subjective cognitive complaints in former American football players.Journal of the International Neuropsychological Society : JINS · 2026
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8 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors at 1 institution in 1 country.

Vladimir Anatolevich ParfenovSechenov First Moscow State Medical University - Moscow, Moskva, Russian Federation.ORCID 0000-0002-1992-7960
Vladimir Vladimirovich ZakharovSechenov First Moscow State Medical University - Moscow, Moskva, Russian Federation.ORCID 0000-0002-8447-3264
Anastasia Romanovna KabaevaSechenov First Moscow State Medical University - Moscow, Moskva, Russian Federation.ORCID 0000-0002-0982-8520
Natalya Vasilyevna VakhninaSechenov First Moscow State Medical University - Moscow, Moskva, Russian Federation.ORCID 0000-0002-0834-4030
Sechenov University · RU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Over 44 million people suffer from dementia around the world. Researchers estimated that there will be 48.1 million people with dementia by 2020 and 90.3 million by 2040. In addition to dementia, mild cognitive impairment (MCI) and subjective cognitive decline (SCD) relate to cognitive impairment. It has been established that MCI precedes dementia, however the significance of SCD is still unclear. Recent studies suggest that SCD could be a risk factor for objective cognitive impairment. SCD is defined as а self-estimated decline in cognitive capacity in comparison to an individual's previous level of functioning, which cannot be determined by neuropsychological tests.

objectivesTo perform a systematic review of prospective longitudinal cohort studies that assessed the risk of MCI and dementia among people with SCD.

methodsA search was carried out for all available peer-reviewed articles in English related to SCD in PubMed and PsychINFO databases from database initiation through January 2020. The keywords used for the search were 'subjective cognitive (or memory) impairment (or decline or complaints)'. Three authors separately determined the inclusion or exclusion of all articles retrieved for full-text evaluation.

resultsThe chance of progression to dementia in the SCD group was 2.17 (95% confidence interval [95%CI] 1.53‒3.07; p<0.05) compared to normal aging. Furthermore, the SCD group was 2.15 times more likely to progress to MCI than the group without SCD (95%CI 1.39‒3.30; p=0.005).

conclusionsSCD might precede cognitive impairment, however, more detailed longitudinal studies should be conducted.

Indexed as

agingAlzheimer disease.cognitioncognitive dysfunctiondementia

Identifiers

PMID32973979
PMCPMC7500809
OpenAlexW3088021092

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.