Evidence map›Paper›PMID 40097851›Full record

ArticleSurgical endoscopy2025

Is the annual hospital volume associated with recurrence and chronic postoperative inguinal pain (CPIP) syndrome after inguinal hernia repair in laparo-endoscopic or open mesh technique (Lichtenstein)?

Reinhard Bittner, Solveig Unger, Ferdinand Köckerling, Daniela Adolf

Abstract read
PubMed Publisher
In one paragraph

Article in Surgical endoscopy, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing 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

3 citing papers in PubMed.

  1. Article
  2. Review
  3. 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

4 authors.

Reinhard BittnerEm. Director Surgical Clinic Marienhospital Stuttgart, Supperstr. 19, 70565, Stuttgart, Germany. bittnerfamilie@web.de.ORCID http://orcid.org/0000-0001-7425-9734
Solveig UngerCancer Registry Sachsen gGmbH, Chemnitz, Germany.
Ferdinand KöckerlingHernia Center, Vivantes Humboldt-Hospital, Academic Teaching Hospital of Charité University Medicine, Am Nordgraben 2, 13509, Berlin, Germany.
Daniela AdolfDepartment of Biometry and Data Management, Statconsult - Company for Clinical and Health Care Research, Am Fuchsberg 11, 39112, Magdeburg, Germany.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundIn major surgery, several studies have shown a correlation between high annual hospital volume (hospital caseload) and better outcome. Therefore, centralization is recommended. However, in inguinal hernia surgery the data are limited.

methodsThe study is based on a retrospective analysis of prospective data from the German Herniamed Registry collected between 2009 and 2018. Out of the total of 731,982 patients operated on in 737 institutions, patients who had undergone inguinal hernia repair in Lichtenstein or in laparo-endoscopic (TAPP/TEP) technique were included. Hospitals were divided into three annual caseload categories: Low volume: ≤ 75 cases; middle volume: 76-199 cases; high volume: ≥ 200 cases. The relationship between hospital volume and the outcome parameters was analyzed using multivariable binary logistic models.

results222,487 patients were enrolled in analysis, with 70.4% hernias operated on in laparo-endoscopic technique and 29.6% cases in open mesh technique. Overall, the outcome after laparo-endoscopic repair was significantly favorable except for the intraoperative complications (worse) and recurrence rate (no significant difference). Descriptive and multivariable analysis identified a long operating time as the main factor associated with an unfavorable outcome. In low-volume hospitals the risk was higher for intraoperative complications as well as for postoperative complications in both techniques. There was a significantly favorable association between the recurrence rate and hospital volume but only after laparo-endoscopic repair. Patients who were operated on in a low-volume center experienced significantly less pain across all three pain categories, independently of the technique used.

conclusionsWhile hospital volume has a favorable association with most outcome parameters, this varied in accordance with the operative technique used. In contrast to open surgery, laparo-endoscopic surgery in a low-volume hospital (≤ 75) has the disadvantage of a higher recurrence rate. Long operating time is the most detrimental factor, proving that surgeon proficiency is of paramount importance. However, chronic postoperative inguinal pain (CPIP) syndrome is significantly less frequent in patients operated on in low-volume hospitals; this result is difficult to explain but may be due to a closer patient-surgeon relationship in these institutions.

Indexed as

Chronic PainHernia, InguinalHerniorrhaphyHospitals, High-VolumeHospitals, Low-VolumeLaparoscopyPostoperative PainAdultAgedFemaleGermanyHumansMaleMiddle AgedOperative TimeRecurrenceChronic postoperative inguinal pain (CPIP)Hospital volumeInguinal herniaLaparo-endoscopic repairLichtenstein operationOpen mesh repairRecurrence rate

Identifiers

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.