Evidence map›Paper›PMID 33313101›Full record

ArticleAnnals of translational medicine2020

Efficacy of the levonorgestrel-releasing intrauterine device is associated with different subtypes of adenomyosis: a retrospective study.

Shuyi Chen, Jianzhang Wang, Wenting Sun, Libo Zhu, Jiayi He, Xinmei Zhang

Open access · diamondAbstract read
In one paragraph

Article in Annals of translational medicine, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed, 1 pooled it
2.6field-weighted citation impact, top 11% 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

11 citing papers in PubMed, 1 synthesis or guideline pooled it, 25 citations in OpenAlex.

  1. Pooled it
  2. Analysis of Non-responders to LNG-IUS in Cases of Heavy Menstrual Bleeding.Journal of obstetrics and gynaecology of India · 2026
    Article
  3. Article
  4. Spontaneous Fracture of Copper Intrauterine Devices: A Decade-Long Retrospective Analysis From a Single Tertiary Center.Medical science monitor : international medical journal of experimental and clinical research · 2025
    Article
  5. Observational
  6. Article
  7. Observational
  8. Article
  9. Article
  10. The Effects of Hormonal and Non-Hormonal Intrauterine Devices on Female Sexual Function: A Systematic Review.International journal of sexual health : official journal of the World Association for Sexual Health · 2023
    Article
  11. 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

6 authors at 1 institution in 1 country.

Shuyi ChenThe Department of Gynecology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China.
Jianzhang WangThe Department of Gynecology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China.
Wenting SunThe Department of Gynecology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China.
Libo ZhuThe Department of Gynecology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China.
Jiayi HeThe Department of Gynecology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China.
Xinmei ZhangThe Department of Gynecology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China.
Women's Hospital, School of Medicine, Zhejiang University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAlthough the levonorgestrel-releasing intrauterine device (LNG-IUD) has been widely applied in the treatment of adenomyosis, not all the patients are satisfied with its efficacy. The present retrospective study aimed to investigate the efficacy of LNG-IUD on different subtypes of adenomyosis.

methodsThe study comprised a cohort of 207 patients who received the LNG-IUD at the Women's Hospital, Zhejiang University School of Medicine, China, from June 2013 to June 2016. Different subtypes of adenomyosis were classified by magnetic resonance imaging (MRI) and patients were subcategorized into three groups (subtype I: intrinsic, n=70; subtype II: extrinsic, n=73; subtype IV: indeterminate, n=64). Multiple variables were compared among the different groups.

resultsPatient demographics, clinical features and the treatment effects of the LNG-IUD were compared between the three subtype groups. The numeric rating scale (NRS) and pictorial blood loss assessment chart (PBAC) score markedly decreased after insertion of the LNG-IUD compared with baseline in all patients in the three subtype groups (P<0.001 for all groups). Compared to the other two subtypes, the efficacy rate was lower and the spontaneous expulsion rate was higher in subtype IV adenomyosis patients than that in other two groups (P<0.05). The independent factor associated with the spontaneous expulsion of the system was suggested to be uterine size before IUD placement and bleeding amount after LNG-IUD treatment in the subtype I [P=0.029, hazards ratio (HR): 3.37, 95% confidence interval (CI): 1.09-6.88] and IV (P=0.045, HR: 1.02, 95% CI: 1.01-1.21) adenomyosis patients respectively.

conclusionsThe LNG-IUD is proved to be an effective approach to treat subtype I and II adenomyosis. However, further study is warranted to explore a more suitable protocol to treat this subtype IV adenomyosis due to the high incidence of treatment failure and expulsion.

Indexed as

Adenomyosisexpulsionlevonorgestrel-releasing intrauterine device (LNG-IUD)magnetic resonance imaging classification (MRI classification)treatment failure

Identifiers

PMID33313101
PMCPMC7723608
OpenAlexW3093179855

What OpenQuestion holds

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LicenceCC BY-NC-ND
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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.