Evidence map›Paper›PMID 33735557›Full record

SynthesisCancer research and treatment2021

Neurocognitive Effects of Chemotherapy for Colorectal Cancer: A Systematic Review and a Meta-Analysis of 11 Studies.

Soo Young Hwang, Kwanghyun Kim, Byeonggwan Ha, Dongkyu Lee, Seonung Kim, Seongjun Ryu, Jisu Yang, Sun Jae Jung

Abstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Cancer research and treatment, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed
–field-weighted citation impact
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

9 citing papers in PubMed.

  1. Article
  2. A scoping review of symptom clusters during chemotherapy in colorectal cancer patients.Supportive care in cancer : official journal of the Multinational Association of Supportive Care in Cancer · 2026
    Article
  3. Article
  4. Article
  5. Article
  6. Review
  7. Long-term neurocognitive function after whole-brain radiotherapy in patients with melanoma brain metastases in the era of immunotherapy.Strahlentherapie und Onkologie : Organ der Deutschen Rontgengesellschaft ... [et al] · 2022
    Article
  8. Article
  9. Article
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

8 authors.

Soo Young HwangYonsei University College of Medicine, Seoul, Korea.
Kwanghyun KimDepartment of Preventive Medicine, Yonsei University College of Medicine, Seoul, Korea.
Byeonggwan HaYonsei University College of Medicine, Seoul, Korea.
Dongkyu LeeYonsei University College of Medicine, Seoul, Korea.
Seonung KimYonsei University College of Medicine, Seoul, Korea.
Seongjun RyuYonsei University College of Medicine, Seoul, Korea.
Jisu YangDepartment of Public Health, Yonsei University, Seoul, Korea.
Sun Jae JungDepartment of Preventive Medicine, Yonsei University College of Medicine, Seoul, Korea.

Funding

Ministry of Science, ICT and Future PlanningNational Research Foundation of Korea 2020R1C1C1003502
6 · The paper itself

Abstract

purposeChemotherapy-related cognitive impairment (CRCI) is a controversial concept not much explored on colorectal cancer patients. MATERIALS AND

methodsWe identified 11 prospective studies: eight studies on 696 colorectal cancer patients who received chemotherapy and three studies on 346 rectal cancer patients who received neoadjuvant chemoradiotherapy. Standardized mean differences (SMDs) of neuropsychological test results and the cognitive quality-of-life scale were calculated using random effect models. A meta-regression was conducted to investigate the association between mean study population age and effect sizes.

resultsThe association between chemotherapy and cognitive impairment was not clear in colorectal cancer patients (SMD, 0.003; 95% confidence interval, ‒0.080 to 0.086). However, a meta-regression showed that older patients are more vulnerable to CRCI than younger patients (β=‒0.016, p < 0.001).

conclusionChemotherapy has an overall positive negligible effect size on the cognitive function of colorectal patients. Age is a significant moderator of CRCI.

Indexed as

Antineoplastic Combined Chemotherapy ProtocolsColorectal NeoplasmsHumansNeurocognitive DisordersPrognosisCognitive dysfunctionColorectal neoplasmsDrug therapyMeta-analysis

Identifiers

PMID33735557
PMCPMC8524021

What OpenQuestion holds

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Registered trials

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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.