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The Clinical Dementia Rating (CDR)
John C. Morris. Neurology, 1993-11-01
Topic: Risk, prevention and care in population studies
We do not hold a plain-English summary of this study yet. Use the links to the original below for its abstract and findings.
Why it matters
Describes the Clinical Dementia Rating, a scale for grading how severe a person's dementia is. It exists to measure and stage severity, and does not itself treat or cure Alzheimer's disease.
Study details
- Evidence strengthLow
How this study scored 59/100
Published in a leading specialty journal. Scored zero for study design, sample size, effect reported, studied in people and randomised / blinded because the record does not state it.
| Component | Points | Why |
|---|---|---|
| Journal tier | 9 / 10 | Tier 2 — leading specialty journal (Neurology) |
| Journal's citation record | 4 / 4 | Neurology: journal h-index 525 (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 | 1993 — older than 20 years, still counted |
| Sample size | 0 / 4 | Participant count not stated — scores zero (not stated in the record — scored 0) |
| Effect reported | 0 / 3 | No effect size reported — scores zero (not stated in the record — scored 0) |
| Studied in people | 0 / 3 | Not stated whether this was studied in people — scores zero (not stated in the record — scored 0) |
| Randomised / blinded | 0 / 2 | No randomisation or blinding stated — scores zero (not stated in the record — scored 0) |
| Times cited | 7 / 7 | Cited 9,894 times (OpenAlex, 2026-10-10) |
| Citations per year | 5 / 5 | 282.7 citations a year over 35 year(s) since 1993 |
| Impact for its field and year | 4 / 6 | Cited 8.9× the average for papers of its field and year (OpenAlex FWCI) |
| Cited by studies here | 6 / 6 | Cited by 761 other studies in this library |
| Still being cited | 4 / 4 | Cited 1,626 times in 2024–2026 (2026 still in progress; OpenAlex) |
| Senior author's track record | 4 / 4 | Last-listed author John C. Morris: h-index 209 (OpenAlex, whole career) |
| Institution's track record | 2 / 3 | Washington University in St. Louis: institution h-index 1,962 (OpenAlex) |
| Multi-centre collaboration | 0 / 3 | OpenAlex lists 1 institution(s) in 1 country — scores zero (affiliation lists can be incomplete) |
| Indexed in PubMed | 2 / 2 | Indexed in PubMed (PMID 8232972) |
| Free to read | 0 / 2 | Behind a paywall — scores zero |
| Total | 59 / 100 | — |
What each of these 20 components measures, and what this score is not →
Read the original
May need a subscription OpenAlex found no free copy of the full text (checked 6 Feb 1020), so the publisher may charge for it. The PubMed abstract is free.
Cite this study APA, Vancouver, BibTeX · download .bib or .ris
Built from the record alzhub holds for this paper, not looked up. Volume, issue and page numbers are not held in the record. Check the citation against the original before you use it.
APA 7th
Morris, J. C. (1993). The Clinical Dementia Rating (CDR). Neurology. https://doi.org/10.1212/wnl.43.11.2412-a
Vancouver
Morris JC. The Clinical Dementia Rating (CDR). Neurology. 1993. doi:10.1212/wnl.43.11.2412-a. PMID: 8232972.
BibTeX
@article{morris1993-8232972,
author = {Morris, John C.},
title = {{The Clinical Dementia Rating (CDR)}},
journal = {Neurology},
year = {1993},
doi = {10.1212/wnl.43.11.2412-a},
pmid = {8232972},
url = {https://doi.org/10.1212/wnl.43.11.2412-a}
}
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