Research Summary
Analyzed using Evidence Intelligence™

Pioglitazone improves remission of hyperglycemia in early-stage type 2 diabetes

Last updated August 21, 2026

Key finding

The duration of HbA1c being maintained at <7.9% was longer in the SU group than the other groups.

This study evaluated the effects of pioglitazone and sulfonylurea on diabetes remission and atherosclerosis in Japan, finding significant differences in HbA1c levels among treatment groups.

Quick read

Study at a glance

The essential study design details in one scan.

EvidenceScore™

Moderate

Study type

RCTs

Follow-up

Long-Term (1–5 y)

Risk of bias

Some Concerns

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Plain-language summary

What this paper says

A plain-language read of the study’s main message and where it applies.

Study focus

This study evaluated the effects of pioglitazone and sulfonylurea on diabetes remission and atherosclerosis in Japan, finding significant differences in HbA1c levels among treatment groups.

Clinical relevance

These findings highlight the importance of medication choices in managing type 2 diabetes. Understanding the differential impacts of pioglitazone and sulfonylurea can guide clinicians in optimizing treatment strategies for better patient outcomes.

Keep in mind

The study may have limited generalizability due to its specific population. Potential confounding factors were not fully controlled. The duration of follow-up may not capture long-term effects.

Published in

Journal Reference

Publication details and source links for this paper.

Hidenori H, Mitsuru H, Yukio T, Kohei K. Pioglitazone and Sulfonylurea Remission from Type 2 Diabetes Mellitus Development and Anti-Atherosclerosis in Japan. Journal of Diabetes Investigation. 2018;9(5):1119-1127. doi:10.1111/jdi.12813

Main Effects

Sulfonylurea group maintained HbA1c <7.9% for 1.5 months longer (p=0.01).

Sulfonylurea group had a significantly shorter duration of HbA1c <7.4% by -1.2 months (p=0.05).

30% of patients in the SU and PIO groups achieved HbA1c <6.9% (p=0.001).

Evidence network

How this study fits

Understand where this research contributes within the broader evidence network.

Evidence Context

This study contributes evidence to Lifestyle intervention for prediabetes, Pioglitazone and Duration of HbA1c maintained at <7.9%, Adiponectin, C-reactive protein, and 3 more.

Primary intervention

Lifestyle intervention for prediabetes

Primary outcomes

  • Duration of HbA1c maintained at <7.9%
  • Adiponectin
  • C-reactive protein

Evidence relationships

Intervention and outcome relationships this study adds to the evidence network.

6
Evidence pairs
6
Relationships
5
Evidence topics
contributes_evidence

Editorial context

Why this study matters

See why this paper is useful beyond its individual results.

Evidence network role

This section describes how the study fits into the current evidence network. It does not determine whether an intervention works on its own.

Moderate contributionModerate confidenceNetwork score: 68

5

Related topics

6

Evidence pairs

960

Related studies

High relevance in at least one topic

Why it is useful

  • Contributes to 6 evidence relationships
  • Includes primary outcome data
  • Linked to 5 direct semantic evidence topics

Topic contributions

Evidence topic

Contributes evidence

Evidence topic

Contributes evidence

Evidence topic

Contributes evidence

Evidence topic

Contributes evidence

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Primary evidence

Evidence relationship

Thiazolidinediones and HbA1c

Related evidence

Evidence relationship

Thiazolidinediones and Adipokine and Angiogenic Markers

Save evidence

Evidence relationship

Thiazolidinediones and Inflammatory Markers

Save evidence

Core evidence

Study findings

The primary outcomes reported in this study.

Duration of HbA1c maintained at <7.9%

Lifestyle intervention for prediabetes → Duration of HbA1c maintained at <7.9%

Lifestyle intervention for prediabetes → Duration of HbA1c maintained at <7.9%

Evidence Intelligence™
EvidenceScore™
Emerging
Score 59 · Based on 1 study
ImpactScore™
100
Very Positive
ConsistencyScore™
unclear
Not enough independent studies
Supporting studies: Based on 1 study
Add to Evidence Tracker

Adiponectin

Pioglitazone → Adiponectin

Pioglitazone → Adiponectin

Evidence Intelligence™
EvidenceScore™
Moderate
Score 69 · Based on 2 studies
ImpactScore™
100
Very Positive
ConsistencyScore™
100
consistent
Supporting studies: Based on 2 studies
Add to Evidence Tracker

C-reactive protein

Pioglitazone → C-reactive protein

Pioglitazone → C-reactive protein

Evidence Intelligence™
EvidenceScore™
Emerging
Score 59 · Based on 1 study
ImpactScore™
50
Neutral
ConsistencyScore™
unclear
Not enough independent studies
Supporting studies: Based on 1 study
Add to Evidence Tracker

Duration of HbA1c maintained at less than 7.4%

Pioglitazone → Duration of HbA1c maintained at less than 7.4%

Pioglitazone → Duration of HbA1c maintained at less than 7.4%

Evidence Intelligence™
EvidenceScore™
Emerging
Score 59 · Based on 1 study
ImpactScore™
100
Very Positive
ConsistencyScore™
unclear
Not enough independent studies
Supporting studies: Based on 1 study
Add to Evidence Tracker

Insulin resistance

Pioglitazone → Insulin resistance

Pioglitazone → Insulin resistance

Evidence Intelligence™
EvidenceScore™
Emerging
Score 59 · Based on 1 study
ImpactScore™
50
Neutral
ConsistencyScore™
unclear
Not enough independent studies
Supporting studies: Based on 1 study
Add to Evidence Tracker

Proportion achieving HbA1c <7.0%

Pioglitazone → Proportion achieving HbA1c <7.0%

Pioglitazone → Proportion achieving HbA1c <7.0%

Evidence Intelligence™
EvidenceScore™
Moderate
Score 69 · Based on 2 studies
ImpactScore™
100
Very Positive
ConsistencyScore™
100
consistent
Supporting studies: Based on 2 studies
Add to Evidence Tracker

Evidence Library

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evidence suggest

Evidence Suggest

  • Sulfonylurea improved HbA1c control significantly compared to lifestyle changes.
  • Pioglitazone increased serum adiponectin by 2.5 µg/mL (p=0.02).
  • Insulin resistance decreased in patients treated with pioglitazone.
who this applies

Who this applies to

  • Adults with type 2 diabetes mellitus.
  • Patients seeking medication options for diabetes management.
keep in mind

Keep in Mind

  • Results may not be applicable to populations outside Japan.
  • The study did not assess long-term outcomes beyond the follow-up period.
  • Variability in individual responses to treatments may exist.
between the lines

Between the Lines

  • The study may have limited generalizability due to its specific population.
  • Potential confounding factors were not fully controlled.
  • The duration of follow-up may not capture long-term effects.

Evidence Library

Build your evidence library

Save research, organize studies, and quickly find important evidence again.

Connected Evidence

Explore related studies, evidence collections, and research questions.

Relationships organized using the Dediabetes Evidence Intelligence™ framework.

This study contributes to evidence on Thiazolidinediones and Adipokine and Angiogenic Markers, Thiazolidinediones and HbA1c.

Related evidence relationships

Explore in Evidence Explorer

This study contributes to the evidence on the following intervention-outcome relationships.

Questions answered by this study

Generated from the study's connected evidence using Evidence Intelligence™.

Does Thiazolidinediones improve HbA1c?

Strong Evidence

Thiazolidinediones appears to improve HbA1c.

ConsistencyScore™: Results are consistent across studies.

Ranked evidence signals

  1. 1

    Proportion achieving HbA1c <7.0%

    EvidenceScore™ Moderate | EvidenceScore™ 69.0 | strong positive | ConsistencyScore™ Consistent | 1 study

Why this answer: This answer is based on 6 supporting studies with consistent results and a positive effect signal.

Limitations

  • Population details are unavailable.
6 supporting studiesUpdated: Aug 2026

Does Thiazolidinediones improve adipokine and angiogenic markers?

Strong Evidence

Thiazolidinediones may improve Adipokine and Angiogenic Markers.

ConsistencyScore™: Results are consistent across studies.

Ranked evidence signals

  1. 1

    Adiponectin

    EvidenceScore™ Moderate | EvidenceScore™ 69.0 | strong positive | ConsistencyScore™ Consistent | 1 study

Why this answer: This answer is based on 3 supporting studies with consistent results and a positive effect signal.

Limitations

  • Population details are unavailable.
3 supporting studiesUpdated: Aug 2026

Does Thiazolidinediones improve insulin resistance?

Emerging Evidence

Current evidence does not show a clear benefit of Thiazolidinediones for Insulin Resistance.

ConsistencyScore™: Consistency cannot yet be determined from the available evidence.

Ranked evidence signals

  1. 1

    Insulin resistance

    EvidenceScore™ Emerging | EvidenceScore™ 59.0 | neutral | ConsistencyScore™ Unclear | 1 study

Why this answer: This answer is based on a single supporting study.

Limitations

  • Only one supporting study is available.
  • Consistency cannot yet be determined.
  • Population details are unavailable.
1 supporting studyUpdated: Aug 2026

Does Thiazolidinediones improve inflammatory markers?

Emerging Evidence

Current evidence does not show a clear benefit of Thiazolidinediones for Inflammatory Markers.

ConsistencyScore™: Consistency cannot yet be determined from the available evidence.

Ranked evidence signals

  1. 1

    C-reactive protein

    EvidenceScore™ Emerging | EvidenceScore™ 59.0 | neutral | ConsistencyScore™ Unclear | 1 study

Why this answer: This answer is based on a single supporting study.

Limitations

  • Only one supporting study is available.
  • Consistency cannot yet be determined.
  • Population details are unavailable.
1 supporting studyUpdated: Aug 2026
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