Evidence Intelligence™
- EvidenceScore™
- 83
- Strong
- ImpactScore™
- 95
- Very Positive
- ConsistencyScore™
- 100
- consistent
Supporting studies: Based on 11 studies
Add to Evidence TrackerResearch Summary
Analyzed using Evidence Intelligence™
Tirzepatide improves glycaemic control and weight in type 2 diabetes
Last updated July 4, 2026
Key finding
At Week 104, participants in the tirzepatide 5 mg group had a mean reduction in HbA1c of -2.3% compared to insulin glargine (-1.0%) (p < 0.001).
This post-hoc analysis of the SURPASS-4 trial compared tirzepatide to insulin glargine in participants with type 2 diabetes, finding significant reductions in HbA1c and body weight with tirzepatide.
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
High Risk
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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 post-hoc analysis of the SURPASS-4 trial compared tirzepatide to insulin glargine in participants with type 2 diabetes, finding significant reductions in HbA1c and body weight with tirzepatide.
Clinical relevance
These findings are clinically significant as they suggest that tirzepatide may offer a more effective treatment option for managing type 2 diabetes, potentially leading to better patient outcomes in terms of glycemic control and weight management. This could help reduce the risk of diabetes-related complications and improve overall quality of life for patients.
Keep in mind
The analysis is post-hoc, which may introduce biases. Results may not be generalizable to all populations with type 2 diabetes. Long-term safety and efficacy beyond 104 weeks were not assessed.
Published in
Journal Reference
Publication details and source links for this paper.
Haixia G, Hongwei J, Huijuan Y, Jie S, Jiawei X, Linong J. Tirzepatide versus Insulin Glargine in Participants with Type 2 Diabetes: A Post-Hoc Analysis of the SURPASS-4 Trial. Diabetes, Obesity & Metabolism. 2025;27(11):6480-6490. doi:10.1111/dom.70047
Main Effects
Tirzepatide 5 mg reduced HbA1c by -2.3% compared to insulin glargine (-1.0%) (p < 0.001).
Tirzepatide 10 mg reduced body weight by -10.0 kg compared to insulin glargine (2.1 kg) (p < 0.001).
Significantly more participants on tirzepatide 15 mg achieved HbA1c <7.0% compared to insulin glargine (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 Tirzepatide and Body weight, HbA1c, Incidence of hypoglycaemia, and 1 more.
This study contributes evidence to
Primary intervention
Tirzepatide
Primary outcomes
- Body weight
- HbA1c
- Incidence of hypoglycaemia
Evidence topics
Primary intervention
Primary outcomes
Evidence relationships
Intervention and outcome relationships this study adds to the evidence network.
4
Evidence pairs
4
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
4
Evidence pairs
546
Related studies
High relevance in at least one topic
Why it is useful
- Contributes to 4 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
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Primary evidence
Evidence relationship
GLP-1 Receptor Agonists and HbA1c
Related evidence
Evidence relationship
GLP-1 Receptor Agonists and Body Weight
Save evidence
Evidence relationship
GLP-1 Receptor Agonists and Hypoglycemia
Save evidence
Core evidence
Study findings
The primary outcomes reported in this study.
Evidence Intelligence™
- EvidenceScore™
- 84
- Strong
- ImpactScore™
- 96
- Very Positive
- ConsistencyScore™
- 100
- consistent
Supporting studies: Based on 12 studies
Add to Evidence TrackerIncidence of hypoglycaemia
Tirzepatide → Incidence of hypoglycaemia
Tirzepatide → Incidence of hypoglycaemia
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 TrackerProportion achieving HbA1c <7.0%
Tirzepatide → Proportion achieving HbA1c <7.0%
Tirzepatide → 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 TrackerEvidence Library
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Evidence Suggest
- Tirzepatide 15 mg showed a HbA1c reduction of -2.6% (p < 0.001).
- Participants on tirzepatide experienced a mean weight loss of -11.4 kg (p < 0.001).
- Lower incidence of hypoglycemia was observed in tirzepatide groups compared to insulin glargine.
Who this applies to
- Adults diagnosed with type 2 diabetes.
- Patients seeking improved glycemic control and weight management.
Keep in Mind
- The study's findings are based on a specific trial population.
- Further research is needed to confirm long-term effects.
- Individual responses to treatment may vary.
Between the Lines
- The analysis is post-hoc, which may introduce biases.
- Results may not be generalizable to all populations with type 2 diabetes.
- Long-term safety and efficacy beyond 104 weeks 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.
This study contributes to evidence on GLP-1 Receptor Agonists and HbA1c, GLP-1 Receptor Agonists and Body Weight.
Related evidence relationships
Explore in Evidence ExplorerThis study contributes to the evidence on the following intervention-outcome relationships.
Medications
GLP-1 Receptor Agonists → HbA1c
Medications
Evidence Intelligence™
- EvidenceScore™
- 84
- Strong
- ImpactScore™
- 96
- Very Positive
- ConsistencyScore™
- 100
- consistent
Supporting studies: Based on 12 studies
View evidenceMedications
GLP-1 Receptor Agonists → Body Weight
Medications
Evidence Intelligence™
- EvidenceScore™
- 83
- Strong
- ImpactScore™
- 95
- Very Positive
- ConsistencyScore™
- 100
- consistent
Supporting studies: Based on 11 studies
View evidenceIncluded in these evidence collections
Curated evidence collections and hubs this study is part of.
GLP-1 Receptor Agonists Evidence Hub
All studies on GLP-1 Receptor Agonists
12 studies
intervention_hubContributes to GLP-1 Receptor Agonists evidence base.
HbA1c Evidence Hub
All studies measuring HbA1c
12 studies
outcome_hubMeasures HbA1c as a key outcome.
Body Weight Evidence Hub
All studies measuring Body Weight
11 studies
outcome_hubMeasures Body Weight as a key outcome.
Recent Diabetes Research
Latest published studies
recency_collection
Published within the last 2 years.
Explore more in Evidence Explorer
Jump to pre-filtered views in Evidence Explorer.
All studies on Tirzepatide and HbA1c
Intervention: TirzepatideOutcome: HbA1c
12 results
All studies on Tirzepatide and Body weight
Intervention: TirzepatideOutcome: Body weight
11 results
All studies on Tirzepatide
Intervention: Tirzepatide
12 results
All studies measuring HbA1c
Outcome: HbA1c
12 results
All studies measuring Body weight
Outcome: Body weight
11 results
Questions answered by this study
Generated from the study's connected evidence using Evidence Intelligence™.
Does GLP-1 Receptor Agonists improve HbA1c?
Strong Evidence
GLP-1 Receptor Agonists appears to improve HbA1c.
ConsistencyScore™: Results are consistent across studies.
Ranked evidence signals
- 1
HbA1c
EvidenceScore™ Strong | EvidenceScore™ 83.9 | strong positive | ConsistencyScore™ Consistent | 1 study
- 2
Proportion achieving HbA1c <7.0%
EvidenceScore™ Moderate | EvidenceScore™ 69.0 | strong positive | ConsistencyScore™ Consistent | 1 study
Why this answer: This answer is based on 29 supporting studies with consistent results and a positive effect signal.
Limitations
- Population details are unavailable.
Does GLP-1 Receptor Agonists affect body weight?
Strong Evidence
GLP-1 Receptor Agonists appears to improve Body Weight.
ConsistencyScore™: Results are consistent across studies.
Ranked evidence signals
- 1
Body weight
EvidenceScore™ Strong | EvidenceScore™ 83.3 | strong positive | ConsistencyScore™ Consistent | 1 study
Why this answer: This answer is based on 30 supporting studies with consistent results and a positive effect signal.
Limitations
- Population details are unavailable.
Does GLP-1 Receptor Agonists affect hypoglycemia?
Strong Evidence
GLP-1 Receptor Agonists may improve Hypoglycemia.
ConsistencyScore™: Results are consistent across studies.
Ranked evidence signals
- 1
Incidence of hypoglycaemia
EvidenceScore™ Emerging | EvidenceScore™ 59.0 | neutral | ConsistencyScore™ Unclear | 1 study
Why this answer: This answer is based on 11 supporting studies with consistent results and a positive effect signal.
Limitations
- Population details are unavailable.
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