Evidence map›Paper›PMID 21512883›Full record

ArticleSurgical endoscopy2011

Evaluation of the learning curve in laparoscopic low anterior resection for rectal cancer.

Hajime Kayano, Junji Okuda, Keitaro Tanaka, Keisaku Kondo, Nobuhiko Tanigawa

Abstract readEvaluation Study
PubMed Publisher
In one paragraph

Article in Surgical endoscopy, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 70 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
70citing papers in PubMed, 5 pooled it
5.1field-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

70 citing papers in PubMed, 5 syntheses or guidelines pooled it, 152 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Short- and Long-Term Oncological Outcome After Rectal Cancer Surgery: a Systematic Review and Meta-Analysis Comparing Open Versus Laparoscopic Rectal Cancer Surgery.Journal of gastrointestinal surgery : official journal of the Society for Surgery of the Alimentary Tract · 2018
    Pooled it
  4. Learning curve in robotic rectal cancer surgery: current state of affairs.International journal of colorectal disease · 2016
    Pooled it
  5. Pooled it
  6. Review
  7. Article
  8. Article
  9. Anastomotic Leak Following Colorectal Surgery.Clinics in colon and rectal surgery · 2026
    Review
  10. Article
  11. Article
  12. Article
  13. [Predictability of anastomotic leaks in visceral surgery].Chirurgie (Heidelberg, Germany) · 2024
    Article
  14. Review
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  16. Article
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  19. Review
  20. Article

10 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

5 authors at 1 institution in 1 country.

Hajime KayanoDepartment of General and Gastroenterological Surgery, Osaka Medical College, 2-7 Daigakumachi, Takatsuki-City, Osaka 569-8686, Japan.
Junji Okuda
Keitaro Tanaka
Keisaku Kondo
Nobuhiko Tanigawa
Osaka Medical and Pharmaceutical University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundLaparoscopic low anterior resection for rectal cancer is considered to be more technically demanding than laparoscopic colectomy. This study aimed to analyze the learning curve for laparoscopic low anterior resection and to identify the factors that influence this learning curve.

methodsData from 250 consecutive patients undergoing laparoscopic low anterior resection for rectal cancer, excluding patients with a combined resection such as cholecystectomy, hepatectomy, hysterectomy, or gastrectomy, between December 1996 and April 2010 were analyzed. For operative time, the learning curve was analyzed using the moving average method. The conversion rate and the postoperative complication rate were evaluated in five groups of up to 50 patients each based on the number of cases required for analysis of operative time. In addition, risk factors that influenced conversion to open surgery and postoperative complications were analyzed.

resultsThe learning curve analysis for operative time using the moving average method showed stabilization at 50 cases. The conversion rate decreased significantly by group 4 (151-200 cases). The postoperative complication rate decreased significantly by group 5 (201-250 cases). The significant factors for conversion to open surgery were male sex (odds ratio [OR], 2.6094; 95% confidence interval [CI], 1.1-6.4) and T stage (OR, 2.4793; 95% CI, 1.1-5.8). For postoperative complications, male sex (OR, 3.8590; 95% CI, 1.9-3.8) was significant. In addition, the risk factors for anastomotic leakage were male sex (OR, 15.7659, 95% CI, 3.2-284.8) and multiple firing (2 or more cartridges for rectal transection) (OR, 3.0589; 95% CI, 1.1-9.5).

conclusionsThe risk factors affecting the learning curve for laparoscopic low anterior resection were T stage and male sex. In laparoscopic low anterior resection, rectal transection in particular can be technically difficult, and standardization for accurate performance of the same technique for expanded indications is very important.

Indexed as

Learning CurveAdenocarcinomaAnastomosis, SurgicalCombined Modality TherapyFemaleHumansLaparoscopyLymph Node ExcisionMaleNeoadjuvant TherapyPostoperative ComplicationsRectal NeoplasmsRetrospective StudiesRisk Factors

Identifiers

PMID21512883
OpenAlexW2025634718

What OpenQuestion holds

Textmetadata
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.