Evidence map›Paper›PMID 41103913›Full record

ReviewJournal of experimental orthopaedics2025

Pelvic tilt remains unchanged after periacetabular osteotomy: A single-arm multilevel meta-analysis and meta-regression.

Nikolai Ramadanov, Maximilian Voss, Maximilian Heinz, Robert Hable, Robert Prill, Roland Becker, Plamen Penchev, Sufian S Ahmad

Abstract readReview
In one paragraph

Review in Journal of experimental orthopaedics, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed, 2 pooled it
–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

6 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Article
  4. Review
  5. Article
  6. Review
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.

Nikolai RamadanovCenter of Orthopaedics and Traumatology, Brandenburg Medical School University Hospital Brandenburg an der Havel Brandenburg an der Havel Germany.ORCID https://orcid.org/0000-0003-4669-8187
Maximilian VossCenter of Orthopaedics and Traumatology, Brandenburg Medical School University Hospital Brandenburg an der Havel Brandenburg an der Havel Germany.
Maximilian HeinzCenter of Orthopaedics and Traumatology, Brandenburg Medical School University Hospital Brandenburg an der Havel Brandenburg an der Havel Germany.
Robert HableFaculty of Applied Computer Science Deggendorf Institute of Technology Deggendorf Germany.
Robert PrillCenter of Orthopaedics and Traumatology, Brandenburg Medical School University Hospital Brandenburg an der Havel Brandenburg an der Havel Germany.
Roland BeckerCenter of Orthopaedics and Traumatology, Brandenburg Medical School University Hospital Brandenburg an der Havel Brandenburg an der Havel Germany.
Plamen PenchevFaculty of Medicine Medical University of Plovdiv Plovdiv Bulgaria.
Sufian S AhmadDepartment of Orthopaedic Surgery Hannover Medical School Hannover Germany.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Purpose: Understanding changes in pelvic tilt (PT) after periacetabular osteotomy (PAO) is essential for surgical planning and outcome assessment. This study aimed to synthesise current evidence on pre- and postoperative PT and identify associated factors using meta-regression. Methods: A systematic search of PubMed, Embase, and Epistemonikos was conducted through 31 May 2025. A single-arm multilevel meta-analysis was performed using a random-effects model to estimate mean PT values before and after PAO. Subgroup analyses examined differences based on surgical indication (DDH/BDDH vs. others) and unilateral vs. bilateral surgery. Meta-regression assessed the impact of age, sex and BMI on PT outcomes. Statistical analyses were performed using R. Results: Twelve primary studies comprising 680 patients (785 hips) were included. The mean preoperative pelvic tilt (PT) was 8.13° and decreased slightly postoperatively to 6.81°, with no statistically significant overall change. The greatest positional change was observed in the sitting position (mean difference: 12.01°), though this was also not statistically significant. Subgroup analyses showed no significant differences in PT based on operative indication or unilateral vs. bilateral surgery. Meta-regression identified patient age as a significant predictor of postoperative PT in the sitting position ( Conclusion: Pelvic tilt remains largely unchanged after PAO, regardless of operative indication or surgical laterality. However, older age is associated with lower postoperative PT in the sitting position, highlighting the importance of considering individual patient characteristics in surgical planning and assessment. Level of Evidence: Level IIa, systematic review and meta-analysis of predominantly prospective and retrospective cohort studies.

Indexed as

dysplasiameta‐analysispelvic tiltperiacetabular osteotomysystematic review

Identifiers

PMID41103913
PMCPMC12527223

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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.