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Journal of Gastroenterology

, Volume 52, Issue 3, pp 301–307 | Cite as

Factors associated with poor therapeutic response in outpatients with irritable bowel syndrome: a multicenter study in Japan

  • Eiji Yamada
  • Seishi Tsunoda
  • Tsuyoshi Abe
  • Eri Uchida
  • Hiromichi Teraoka
  • Seitaro Watanabe
  • Ichiro Kawana
  • Masataka Tagri
  • Noriomi Hosaka
  • Kazuki Nagai
  • Haruo Nishino
  • Atsushi NakajimaEmail author
Original Article—Alimentary Tract

Abstract

Background

Some patients with irritable bowel syndrome (IBS) show poor response to treatment. However, risk factors associated with poor therapeutic response have not been determined.

Methods

This multicenter trial evaluated consecutive outpatients with IBS undergoing treatment for more than 1 month. Mental health status and physical function were evaluated using the Japanese version of the SF-8. Therapeutic response was evaluated using the IBS severity index-Japanese version (IBS-SIJ). Patients with IBS-SIJ scores ≥175 were defined as poor responders to treatment, whereas those with IBS-SIJ scores <175 were defined as good responders. The demographic and clinical characteristics of these two groups, along with medications, were compared.

Results

The study enrolled 131 participants, 75 with IBS-SIJ scores ≥175–56 with IBS-SIJ scores <175. Multiple logistic regression analysis showed that female sex [odds ratio (OR) 2.67, 95 % confidence interval (CI) 1.19–5.97, p = 0.0167] and mental component summary (MCS) of the SF-8 <40 (OR 2.58, 95 % CI 1.12–5.97, p = 0.0263) were independent risk factors for poor therapeutic response in patients with IBS.

Conclusions

Lower MCS and female sex were risk factors for poor therapeutic response in patients with IBS. Ascertaining the mechanisms by which lower MCS and female sex are associated with poor therapeutic response in IBS may help design better treatments (Trial registration number: UMIN000016804).

Keywords

Irritable bowel syndrome Poor therapeutic response Mental health 

Abbreviations

IBS

Irritable bowel syndrome

BMI

Body mass index

GERD

Gastroesophageal reflux disease

FD

Functional dyspepsia

PCS

Physical component summary

MCS

Mental component summary

PPI

Proton pump inhibitor

NSAID

Non-steroidal anti-inflammatory drug

QOL

Quality of life

PTRG

Poor therapeutic response group

Notes

Acknowledgments

The authors thank the nurses and staff of all centers for their help in collecting data.

Complicance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Declaration of funding interests

None.

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Copyright information

© Japanese Society of Gastroenterology 2016

Authors and Affiliations

  • Eiji Yamada
    • 1
  • Seishi Tsunoda
    • 2
  • Tsuyoshi Abe
    • 3
  • Eri Uchida
    • 4
  • Hiromichi Teraoka
    • 5
  • Seitaro Watanabe
    • 1
  • Ichiro Kawana
    • 1
  • Masataka Tagri
    • 6
  • Noriomi Hosaka
    • 7
  • Kazuki Nagai
    • 8
  • Haruo Nishino
    • 9
  • Atsushi Nakajima
    • 10
    Email author
  1. 1.Gastroenterology DivisionSaiseikai Yokohama-shi Nanbu HospitalYokohamaJapan
  2. 2.Tsunoda IinYokohamaJapan
  3. 3.Abe ClinicSagamiharaJapan
  4. 4.Gastroenterology DivisionChigasaki Municipal HospitalChigasakiJapan
  5. 5.Teraoka ClinicYokohamaJapan
  6. 6.Department of Biostatistics and EpidemiologyYokohama City University School of MedicineYokohamaJapan
  7. 7.Hikari ClinicYokohamaJapan
  8. 8.Nagai ClinicYokohamaJapan
  9. 9.Matsushima ClinicYokohamaJapan
  10. 10.Department of Gastroenterology and HepatologyYokohama City University School of MedicineYokohamaJapan

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