Evidence map›Paper›PMID 26140004›Full record

Trial reportWorld journal of gastroenterology2015

Four-sample lactose hydrogen breath test for diagnosis of lactose malabsorption in irritable bowel syndrome patients with diarrhea.

Jian-Feng Yang, Mark Fox, Hua Chu, Xia Zheng, Yan-Qin Long, Daniel Pohl, Michael Fried, Ning Dai

Open access · bronzeAbstract readComparative StudyRandomized Controlled Trial
In one paragraph

Trial report in World journal of gastroenterology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed
1.2field-weighted citation impact, top 17% 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

7 citing papers in PubMed, 22 citations in OpenAlex.

  1. Trial
  2. Article
  3. Article
  4. Article
  5. Review
  6. Logical hypothesis: Low FODMAP diet to prevent diverticulitis.World journal of gastrointestinal pharmacology and therapeutics · 2016
    Review
  7. 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 at 1 institution in 3 countries.

Jian-Feng YangJian-Feng Yang, Department of Gastroenterology, The First People's Hospital of Hangzhou, Hangzhou 310016, Zhejiang Province, China.
Mark FoxJian-Feng Yang, Department of Gastroenterology, The First People's Hospital of Hangzhou, Hangzhou 310016, Zhejiang Province, China.
Hua ChuJian-Feng Yang, Department of Gastroenterology, The First People's Hospital of Hangzhou, Hangzhou 310016, Zhejiang Province, China.
Xia ZhengJian-Feng Yang, Department of Gastroenterology, The First People's Hospital of Hangzhou, Hangzhou 310016, Zhejiang Province, China.
Yan-Qin LongJian-Feng Yang, Department of Gastroenterology, The First People's Hospital of Hangzhou, Hangzhou 310016, Zhejiang Province, China.
Daniel PohlJian-Feng Yang, Department of Gastroenterology, The First People's Hospital of Hangzhou, Hangzhou 310016, Zhejiang Province, China.
Michael FriedJian-Feng Yang, Department of Gastroenterology, The First People's Hospital of Hangzhou, Hangzhou 310016, Zhejiang Province, China.
Ning DaiJian-Feng Yang, Department of Gastroenterology, The First People's Hospital of Hangzhou, Hangzhou 310016, Zhejiang Province, China.
University Hospital of Zurich · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimTo validate 4-sample lactose hydrogen breath testing (4SLHBT) compared to standard 13-sample LHBT in the clinical setting.

methodsIrritable bowel syndrome patients with diarrhea (IBS-D) and healthy volunteers (HVs) were enrolled and received a 10 g, 20 g, or 40 g dose lactose hydrogen breath test (LHBT) in a randomized, double-blinded, controlled trial. The lactase gene promoter region was sequenced. Breath samples and symptoms were acquired at baseline and every 15 min for 3 h (13 measurements). The detection rates of lactose malabsorption (LM) and lactose intolerance (LI) for a 4SLHBT that acquired four measurements at 0, 90, 120, and 180 min from the same data set were compared with the results of standard LHBT.

resultsSixty IBS-D patients and 60 HVs were studied. The genotype in all participants was C/C-13910. LM and LI detection rates increased with lactose dose from 10 g, 20 g to 40 g in both groups (P < 0.001). 4SLHBT showed excellent diagnostic concordance with standard LHBT (97%-100%, Kappa​​ 0.815-0.942) with high sensitivity (90%-100%) and specificity (100%) at all three lactose doses in both groups.

conclusionReducing the number of measurements from 13 to 4 samples did not significantly impact on the accuracy of LHBT in health and IBS-D. 4SLHBT is a valid test for assessment of LM and LI in clinical practice.

Indexed as

Breath TestsBiomarkersChinaCross-Over StudiesDiarrheaDouble-Blind MethodGenetic Predisposition to DiseaseHumansHydrogenIrritable Bowel SyndromeLactaseLactoseLactose IntolerancePolymorphism, Single NucleotidePredictive Value of TestsPromoter Regions, GeneticBiomarkersHydrogenLactaseLactoseDiagnosisIrritable bowel syndromeLactose hydrogen breath testLactose intoleranceLactose malabsorption

Identifiers

PMID26140004
PMCPMC4481453
OpenAlexW2402877642

What OpenQuestion holds

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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.