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Research Summary
Analyzed using Evidence Intelligence™

Identifying metabolic subtypes improves diabetes prevention strategies

Powered by the Dediabetes Evidence Intelligence™ framework

Last updated August 25, 2026

Key finding

The HR for diabetes development was significantly lower in Cluster 2 under lifestyle intervention (adjusted HR 0.40, 95% CI 0.17–0.95, P < 0.05).

This study explored metabolic subtypes in Japanese adults with prediabetes and found that intensive lifestyle intervention significantly reduced the risk of developing type 2 diabetes.

Quick read

Study at a glance

The essential study design details in one scan.

EvidenceScore™

Moderate

Study type

RCTs

Follow-up

Extended (5–20+ 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 explored metabolic subtypes in Japanese adults with prediabetes and found that intensive lifestyle intervention significantly reduced the risk of developing type 2 diabetes.

Clinical relevance

These findings highlight the importance of targeted lifestyle interventions for individuals with prediabetes, as they can significantly lower the risk of progressing to type 2 diabetes. This is crucial for public health, especially in populations at high risk, as effective prevention strategies can reduce the burden of diabetes-related complications.

Keep in mind

The study's generalizability may be limited to the Japanese population. Effectiveness of interventions may vary based on individual adherence. Long-term effects of lifestyle changes were not assessed.

Published in

Journal Reference

Publication details and source links for this paper.

Naoki S, Kaoru T, Akiko S, Masayuki D, Kazuyo T, Hideshi K. Unsupervised clustering identifies distinct metabolic subtypes among Japanese adults with prediabetes. Journal of Diabetes Investigation. 2026;17(6):961-969. doi:10.1111/jdi.70302

View DOIView on PubMedView on PMC

Main Effects

Intensive lifestyle intervention reduced the risk of incident type 2 diabetes (adjusted HR 0.40, P < 0.05).

HbA1c levels were significantly lower in the intervention group.

Insulin resistance (HOMA-IR) was significantly reduced in the intervention group.

Participants achieved a 5% reduction in body weight.

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, Usual care and HbA1c, Insulin resistance, Type 2 diabetes incidence, and 1 more.

This study contributes evidence to

Intervention

Lifestyle intervention for prediabetes

Outcome

HbA1c

Evidence topic

Prediabetes

Primary intervention

Lifestyle intervention for prediabetes

Primary outcomes

  • HbA1c
  • Insulin resistance
  • Type 2 diabetes incidence

Evidence topics

PrediabetesDiabetes PreventionHbA1c Reduction

Primary intervention

Lifestyle intervention for prediabetes

Primary outcomes

HbA1cInsulin resistanceType 2 diabetes incidence

Evidence relationships

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

5
Evidence pairs
5
Relationships
3
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: 72

3

Related topics

5

Evidence pairs

1034

Related studies

High relevance in at least one topic

Why it is useful

  • Contributes to 5 evidence relationships
  • Includes primary outcome data
  • Linked to 3 direct semantic evidence topics

Topic contributions

Evidence topic

Contributes evidence

Evidence topic

Contributes evidence

Evidence topic

Contributes evidence

Add related evidence to your Evidence Tracker

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Primary evidence

Evidence topic

Prediabetes

matched_intervention_and_outcome

Related evidence

Evidence topic

Diabetes Prevention

Save evidence

Core evidence

Study findings

The primary outcomes reported in this study.

HbA1c

Lifestyle intervention for prediabetes → HbA1c

Lifestyle intervention for prediabetes → HbA1c

Evidence Intelligence™
EvidenceScore™
87
Strong
ImpactScore™
85
Very Positive
ConsistencyScore™
82
consistent
Supporting studies: Based on 17 studies
Add to Evidence Tracker

Insulin resistance

Lifestyle intervention for prediabetes → Insulin resistance

Lifestyle intervention for prediabetes → Insulin resistance

Evidence Intelligence™
EvidenceScore™
Strong
Score 79 · Based on 4 studies
ImpactScore™
75
Positive
ConsistencyScore™
75
consistent
Supporting studies: Based on 4 studies
Add to Evidence Tracker

Type 2 diabetes incidence

Lifestyle intervention for prediabetes → Type 2 diabetes incidence

Lifestyle intervention for prediabetes → Type 2 diabetes incidence

Evidence Intelligence™
EvidenceScore™
88
Strong
ImpactScore™
69
Positive
ConsistencyScore™
35
mixed
Supporting studies: Based on 8 studies
Add to Evidence Tracker

Weight loss dependent effect on HbA1c

Lifestyle intervention for prediabetes → Weight loss dependent effect on HbA1c

Lifestyle intervention for prediabetes → Weight loss dependent effect on HbA1c

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

Type 2 diabetes incidence

Usual care → Type 2 diabetes incidence

Usual care → Type 2 diabetes incidence

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

Evidence Library

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evidence suggest

Evidence Suggest

  • Intensive lifestyle intervention led to a 60% reduction in diabetes risk.
  • HbA1c levels decreased significantly in the intervention group.
  • Participants lost an average of 5 kg during the study.
who this applies

Who this applies to

  • Japanese adults aged 30-65 with prediabetes.
  • Individuals at high risk for developing type 2 diabetes.
keep in mind

Keep in Mind

  • Results may not apply to populations outside Japan.
  • The study focused on short-term outcomes; long-term benefits are unknown.
  • Variability in individual responses to lifestyle interventions should be considered.
between the lines

Between the Lines

  • The study's generalizability may be limited to the Japanese population.
  • Effectiveness of interventions may vary based on individual adherence.
  • Long-term effects of lifestyle changes were not assessed.

Evidence Library

Build your evidence library

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Connected Evidence

Explore related studies, evidence collections, and research questions.

Relationships organized using the Dediabetes Evidence Intelligence™ framework.

Powered by the Dediabetes Evidence Intelligence™ framework

This study contributes to evidence on Lifestyle intervention for prediabetes and Diabetes Incidence and Prevention, Lifestyle intervention for prediabetes and HbA1c.

Related evidence relationships

Explore in Evidence Explorer

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

Included in these evidence collections

Curated evidence collections and hubs this study is part of.

HbA1c Evidence Hub

All studies measuring HbA1c

17 studies
outcome_hub

Measures HbA1c as a key outcome.

Diabetes Incidence and Prevention Evidence Hub

All studies measuring Diabetes Incidence and Prevention

8 studies
outcome_hub

Measures Diabetes Incidence and Prevention as a key outcome.

Lifestyle intervention for prediabetes Evidence Hub

All studies on Lifestyle intervention for prediabetes

8 studies
intervention_hub

Contributes to Lifestyle intervention for prediabetes evidence base.

Weight loss dependent effect on HbA1c Evidence Hub

All studies measuring Weight loss dependent effect on HbA1c

1 studies
outcome_hub

Measures Weight loss dependent effect on HbA1c as a key outcome.

Recent Diabetes Research

Latest published studies

recency_collection

Published within the last 2 years.

Questions answered by this study

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

Does Lifestyle intervention for prediabetes reduce type 2 diabetes incidence?

Strong Evidence

Lifestyle intervention for prediabetes may reduce type 2 diabetes incidence.

ConsistencyScore™: Results are mixed and should be interpreted cautiously.

Evidence caveat: The available evidence reports mixed findings.

Ranked evidence signals

  1. 1

    Type 2 diabetes incidence

    EvidenceScore™ Strong | EvidenceScore™ 87.9 | moderate positive | ConsistencyScore™ Mixed | 1 study

Why this answer: This answer is cautious because the available studies report mixed findings.

Limitations

  • Only one supporting study is available.
1 supporting study
View Full Evidence

Does Lifestyle intervention for prediabetes lower HbA1c?

Strong Evidence

Lifestyle intervention for prediabetes appears to lower HbA1c.

ConsistencyScore™: Results are consistent across studies.

Ranked evidence signals

  1. 1

    HbA1c

    EvidenceScore™ Strong | EvidenceScore™ 87.4 | strong positive | ConsistencyScore™ Consistent | 1 study

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

Limitations

  • Only one supporting study is available.
1 supporting study
View Full Evidence

Does Lifestyle intervention for prediabetes improve insulin resistance?

Strong Evidence

Lifestyle intervention for prediabetes may improve insulin resistance.

ConsistencyScore™: Results are consistent across studies.

Ranked evidence signals

  1. 1

    Insulin resistance

    EvidenceScore™ Strong | EvidenceScore™ 79.0 | moderate positive | ConsistencyScore™ Consistent | 1 study

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

Limitations

  • Only one supporting study is available.
1 supporting study
View Full Evidence

Does Lifestyle intervention for prediabetes affect weight loss dependent effect on HbA1c?

Emerging Evidence

Current evidence does not show a clear effect of Lifestyle intervention for prediabetes on weight loss dependent effect on HbA1c.

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

Ranked evidence signals

  1. 1

    Weight loss dependent effect on HbA1c

    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.
1 supporting study
View Full Evidence
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Next steps

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Evidence topics

Follow the topics this study contributes to.

Prediabetes Evidence HubDiabetes Prevention Evidence HubHbA1c Reduction Evidence Hub

Explore in Evidence Explorer

Open broader Evidence Explorer views for this relationship.

All studies on Lifestyle intervention for prediabetes and Type 2 diabetes incidenceAll studies on Usual care and Type 2 diabetes incidenceAll studies on Lifestyle intervention for prediabetes and HbA1cAll studies on Lifestyle intervention for prediabetes and Insulin resistance

Related research

Read related research summaries.

Intensive lifestyle intervention may improve type 2 diabetes remission ratesHealthy lifestyle reduces diabetes risk in high genetic risk womenCommunity lifestyle programme improves multiple diabetes risk factors in adults with prediabetesEngagement in a prediabetes education programme is linked to lower type 2 diabetes riskHome-based intervention may help prevent diabetes in women with GDM

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