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The prevalence of mild cognitive impairment and its etiological subtypes in elderly Chinese
Jia J, Zhou A, Wei C, Jia X, Wang F, Li F, Wu X, Mok V et al.. Alzheimer's & dementia : the journal of the Alzheimer's Association, 2014-01-10
Topic: Risk, prevention and care in population studies
Background Epidemiologic studies on mild cognitive impairment (MCI) are limited in China. Methods Using a multistage cluster sampling design, a total of 10,276 community residents (6096 urban, 4180 rural) aged 65 years or older were evaluated and diagnosed with normal cognition, MCI, or dementia. MCI was further categorized by imaging into MCI caused by prodromal Alzheimer's disease (MCI-A), MCI resulting from cerebrovascular disease (MCI-CVD), MCI with vascular risk factors (MCI-VRF), and MCI caused by other diseases (MCI-O). Results The prevalences of overall MCI, MCI-A, MCI-CVD, MCI-VRF, and MCI-O were 20.8% (95% confidence interval [CI] = 20.0-21.6%), 6.1% (95% CI = 5.7-6.6%), 3.8% (95% CI = 3.4-4.2%), 4.9% (95% CI = 4.5-5.4%), and 5.9% (95% CI = 5.5-6.4%) respectively. The rural population had a higher prevalence of overall MCI (23.4% vs 16.8%, P Conclusions The prevalence of MCI in elderly Chinese is higher in rural than in urban areas. Vascular-related MCI (MCI-CVD and MCI-VRF) was most common.
Key findings
- Results The prevalences of overall MCI, MCI-A, MCI-CVD, MCI-VRF, and MCI-O were 20.8% (95% confidence interval [CI] = 20.0-21.6%), 6.1% (95% CI = 5.7-6.6%), 3.8% (95% CI = 3.4-4.2%), 4.9% (95% CI = 4.5-5.4%), and 5.9% (95% CI = 5.5-6.4%) respectively.
- The rural population had a higher prevalence of overall MCI (23.4% vs 16.8%, P Conclusions The prevalence of MCI in elderly Chinese is higher in rural than in urban areas.
Why it matters
This survey of elderly Chinese residents found an overall mild cognitive impairment prevalence of 20.8%, with vascular-related MCI being most common. It describes how MCI is distributed in this population but does not test any treatment or prevention.
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Study details
- Participants10,276
- Effect size20.8%; 21.6%; 6.1%
- Evidence strengthLow
How this study scored 55/100
Published in a leading specialty journal. Scored zero for study design and randomised / blinded because the record does not state it.
| Component | Points | Why |
|---|---|---|
| Journal tier | 9 / 10 | Tier 2 — leading specialty journal (Alzheimer's & dementia : the journal of the Alzheimer's Association) |
| Journal's citation record | 2 / 4 | Alzheimer s & Dementia: journal h-index 228 (OpenAlex, 2026-10-29) |
| Study design | 0 / 12 | No study design recorded — scores zero, not guessed (not stated in the record — scored 0) |
| Strength of evidence | 1 / 5 | Rated “low” in our summary |
| Peer-review validation | 10 / 10 | Peer-reviewed. Published as an article in a named peer-reviewed journal. |
| How recent | 1 / 5 | 2014 — within 20 year(s) of the newest study here |
| Sample size | 4 / 4 | 10,276 participants |
| Effect reported | 2 / 3 | Effect reported as a number, without an interval or test |
| Studied in people | 3 / 3 | Studied in people (participant count stated) |
| Randomised / blinded | 0 / 2 | No randomisation or blinding stated — scores zero (not stated in the record — scored 0) |
| Times cited | 5 / 7 | Cited 184 times (OpenAlex, 2026-10-10) |
| Citations per year | 3 / 5 | 13.1 citations a year over 14 year(s) since 2014 |
| Impact for its field and year | 3 / 6 | Cited 5.9× the average for papers of its field and year (OpenAlex FWCI) |
| Cited by studies here | 3 / 6 | Cited by 12 other studies in this library |
| Still being cited | 2 / 4 | Cited 41 times in 2024–2026 (2026 still in progress; OpenAlex) |
| Senior author's track record | 1 / 4 | Last-listed author Xiu-min Dong: h-index 5 (OpenAlex, whole career) |
| Institution's track record | 1 / 3 | McGill University: institution h-index 1,373 (OpenAlex) |
| Multi-centre collaboration | 3 / 3 | OpenAlex lists 16 institution(s) in 4 countries |
| Indexed in PubMed | 2 / 2 | Indexed in PubMed (PMID 24418053) |
| Free to read | 0 / 2 | Behind a paywall — scores zero |
| Total | 55 / 100 | — |
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APA 7th
Jia, J., Zhou, A., Wei, C., Jia, X., Wang, F., Li, F., et al. (2014). The prevalence of mild cognitive impairment and its etiological subtypes in elderly Chinese. Alzheimer's & dementia : the journal of the Alzheimer's Association. https://doi.org/10.1016/j.jalz.2013.09.008
Vancouver
Jia J, Zhou A, Wei C, Jia X, Wang F, Li F, et al. The prevalence of mild cognitive impairment and its etiological subtypes in elderly Chinese. Alzheimer's & dementia : the journal of the Alzheimer's Association. 2014. doi:10.1016/j.jalz.2013.09.008. PMID: 24418053.
BibTeX
@article{jia2014-24418053,
author = {Jia, J. and Zhou, A. and Wei, C. and Jia, X. and Wang, F. and Li, F. and Wu, X. and Mok, V. and others},
title = {{The prevalence of mild cognitive impairment and its etiological subtypes in elderly Chinese}},
journal = {Alzheimer's \& dementia : the journal of the Alzheimer's Association},
year = {2014},
doi = {10.1016/j.jalz.2013.09.008},
pmid = {24418053},
url = {https://doi.org/10.1016/j.jalz.2013.09.008}
}
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