Last updated July 11, 2026
Key finding
At 6 months, change in HbA1c was -0.46% [95% CI -0.93, 0.01] for the intervention group.
The study evaluated the Complete Health Improvement Program (CHIP) against usual care in a randomized-controlled trial. Results indicated improvements in HbA1c and waist circumference for the intervention group.
Quick read
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EvidenceScore™
Moderate
Study type
RCTs
Follow-up
Medium-Term (3–12 mo)
Risk of bias
High Risk
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Plain-language summary
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Study focus
The study evaluated the Complete Health Improvement Program (CHIP) against usual care in a randomized-controlled trial. Results indicated improvements in HbA1c and waist circumference for the intervention group.
These findings suggest that the Complete Health Improvement Program (CHIP) may be an effective intervention for improving health markers related to diabetes and obesity. By demonstrating significant reductions in HbA1c and waist circumference, CHIP could play a crucial role in managing diabetes and promoting healthier lifestyles, ultimately reducing the risk of complications associated with these conditions.
Unclear effectiveness for some outcomes due to overlapping confidence intervals. Limited generalizability as the study population may not represent all demographics. Potential biases in self-reported lifestyle survey results.
Published in
Publication details and source links for this paper.
Thomas M, Ryan M, Erin V, et al. Randomized-controlled trials of the Complete Health Improvement Program (CHIP). Pilot and Feasibility Studies. 2026;12:80. doi:10.1186/s40814-026-01828-4
Intervention group showed a decrease in HbA1c by -0.46% [95% CI -0.93, 0.01].
Control group showed a decrease in HbA1c by -0.58% [95% CI -0.95, -0.22].
Intervention group had a reduction in waist circumference of -4.65 inches [95% CI -9.71, 0.41].
Evidence network
Understand where this research contributes within the broader evidence network.
This study contributes evidence to Complete Health Improvement Program (CHIP), Usual care and HbA1c, Lifestyle Survey Results, Waist circumference.
This study contributes evidence to
Primary intervention
Complete Health Improvement Program (CHIP)
Primary outcomes
Evidence topics
Primary intervention
Primary outcomes
Intervention and outcome relationships this study adds to the evidence network.
Editorial context
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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.
2
Related topics
6
Evidence pairs
277
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Evidence topic
Contributes evidence
Evidence topic
Contributes evidence
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Primary evidence
Evidence topic
matched_outcome
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Evidence topic
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Core evidence
The primary outcomes reported in this study.
Complete Health Improvement Program (CHIP) → HbA1c
Complete Health Improvement Program (CHIP) → HbA1c
Complete Health Improvement Program (CHIP) → Lifestyle Survey Results
Complete Health Improvement Program (CHIP) → Lifestyle Survey Results
Complete Health Improvement Program (CHIP) → Waist circumference
Complete Health Improvement Program (CHIP) → Waist circumference
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Relationships organized using the Dediabetes Evidence Intelligence™ framework.
This study contributes to evidence on Usual care and HbA1c, Complete Health Improvement Program (CHIP) and HbA1c.
This study contributes to the evidence on the following intervention-outcome relationships.
Behavioral & Lifestyle
Behavioral & Lifestyle
Curated evidence collections and hubs this study is part of.
All studies measuring HbA1c
Measures HbA1c as a key outcome.
All studies on Usual care
Contributes to Usual care evidence base.
All studies on Complete Health Improvement Program (CHIP)
Contributes to Complete Health Improvement Program (CHIP) evidence base.
Latest published studies
Published within the last 2 years.
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3 results
1 results
3 results
1 results
3 results
Generated from the study's connected evidence using Evidence Intelligence™.
Usual care may improve HbA1c.
ConsistencyScore™: Results are generally consistent across studies.
Ranked evidence signals
HbA1c
EvidenceScore™ Strong | EvidenceScore™ 79.0 | weak positive | ConsistencyScore™ Generally Consistent | 1 study
Why this answer: This answer is based on a single supporting study.
Limitations
Complete Health Improvement Program (CHIP) appears to improve HbA1c.
ConsistencyScore™: Consistency cannot yet be determined from the available evidence.
Ranked evidence signals
HbA1c
EvidenceScore™ Emerging | EvidenceScore™ 59.0 | strong positive | ConsistencyScore™ Unclear | 1 study
Why this answer: This answer is based on a single supporting study.
Limitations
Complete Health Improvement Program (CHIP) appears to improve Lifestyle Survey Results.
ConsistencyScore™: Consistency cannot yet be determined from the available evidence.
Ranked evidence signals
Lifestyle Survey Results
EvidenceScore™ Emerging | EvidenceScore™ 59.0 | strong positive | ConsistencyScore™ Unclear | 1 study
Why this answer: This answer is based on a single supporting study.
Limitations
Complete Health Improvement Program (CHIP) appears to improve Waist circumference.
ConsistencyScore™: Consistency cannot yet be determined from the available evidence.
Ranked evidence signals
Waist circumference
EvidenceScore™ Emerging | EvidenceScore™ 59.0 | strong positive | ConsistencyScore™ Unclear | 1 study
Why this answer: This answer is based on a single supporting study.
Limitations
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