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Impact of comorbidity on lung cancer survival
Tammemagi CM, Neslund-Dudas C, Simoff M, Kvale P.. International journal of cancer, 2003-03-01
Topic: Risk, prevention and care in population studies
Plain-language summary
Lung cancer is associated with smoking and age, both of which are associated with comorbidity. We evaluated the impact of comorbidity on lung cancer survival. Data on 56 comorbidities were abstracted from the records of a cohort of 1,155 patients.
What this study adds
Evidence grade: Moderate
The record lists 1,155 participants. This study looked at how other medical conditions affect survival in people who already have lung cancer, not at Alzheimer's disease. Reported effect size: 11.7%; 54.3%; 25.4%.
Taken from this record’s own fields, not from reading the paper. The grade is assigned from the abstract’s wording; what that means.
Cite this study APA, Vancouver, BibTeX · download .bib or .ris
APA 7th
Tammemagi, C. M., Neslund-Dudas, C., Simoff, M., & Kvale, P. (2003). Impact of comorbidity on lung cancer survival. International journal of cancer. https://doi.org/10.1002/ijc.10882
Vancouver
Tammemagi CM, Neslund-Dudas C, Simoff M, Kvale P. Impact of comorbidity on lung cancer survival. International journal of cancer. 2003. doi:10.1002/ijc.10882. PMID: 12516101.
BibTeX
@article{tammemagi2003-12516101,
author = {Tammemagi, C. M. and Neslund-Dudas, C. and Simoff, M. and Kvale, P.},
title = {{Impact of comorbidity on lung cancer survival}},
journal = {International journal of cancer},
year = {2003},
doi = {10.1002/ijc.10882},
pmid = {12516101},
url = {https://doi.org/10.1002/ijc.10882}
}
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.
Key findings
- We evaluated the impact of comorbidity on lung cancer survival.
- Data on 56 comorbidities were abstracted from the records of a cohort of 1,155 patients.
- Survival effects were evaluated with Cox regression (outcome crude death).
- The adjusted R(2) statistic was used to compare the survival variation explained by predictive variables.
Why it matters
This study looked at how other medical conditions affect survival in people who already have lung cancer, not at Alzheimer's disease. It provides no information about treating, curing or preventing Alzheimer's disease.
Study details
- Participants1,155
- Effect size11.7%; 54.3%; 25.4%
- Evidence strengthModerate
How this study scored 52/100
Published in a peer-reviewed journal. Scored zero for study design and randomized / blinded because the record does not state it.
| Component | Points | Why |
|---|---|---|
| Journal tier | 7 / 10 | Tier 3 — peer-reviewed journal (International journal of cancer) |
| Journal's citation record | 3 / 4 | International Journal of Cancer: journal h-index 328 (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 | 3 / 5 | Rated “moderate” in our summary |
| Peer-review validation | 10 / 10 | Peer-reviewed. Published as an article in a named peer-reviewed journal. |
| How recent | 1 / 5 | 2003 — older than 20 years, still counted |
| Sample size | 3 / 4 | 1,155 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) |
| Randomized / blinded | 0 / 2 | No randomization or blinding stated — scores zero (not stated in the record — scored 0) |
| Times cited | 5 / 7 | Cited 285 times (OpenAlex, 2026-10-10) |
| Citations per year | 3 / 5 | 11.4 citations a year over 25 year(s) since 2003 |
| Impact for its field and year | 3 / 6 | Cited 6.5× the average for papers of its field and year (OpenAlex FWCI) |
| Cited by studies here | 1 / 6 | Cited by 1 other studies in this library |
| Still being cited | 2 / 4 | Cited 24 times in 2024–2026 (2026 still in progress; OpenAlex) |
| Senior author's track record | 3 / 4 | Last-listed author Paul A. Kvale: h-index 51 (OpenAlex, whole career) |
| Institution's track record | 0 / 3 | Henry Ford Hospital: institution h-index 578 (OpenAlex) |
| Multicenter collaboration | 1 / 3 | OpenAlex lists 2 institution(s) in 1 country |
| Indexed in PubMed | 2 / 2 | Indexed in PubMed (PMID 12516101) |
| Free to read | 0 / 2 | Behind a paywall — scores zero |
| Total | 52 / 100 | — |
What each of these 20 components measures, and what this score is not →
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