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CompletedNCT00666458Updated Apr 15, 2010Results posted

18-week add-on to Metformin Comparison of Saxagliptin and Sitagliptin in Adult Patients With Type 2 Diabetes (T2D)

A Phase 3 interventional study of saxagliptin and sitagliptin in Type 2 Diabetes, sponsored by AstraZeneca. Completed at 86 sites in 9 countries. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2010-04-15.

Sponsored by AstraZeneca · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
822
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

Saxagliptin is a new investigational medication being developed for treatment of type 2 diabetes. This study is designed to assess the efficacy and tolerability of saxagliptin in addition to metformin and compare to sitagliptin in addition with metformin.

02

Conditions studied

  • Type 2 Diabetes

Keywords

  • Type 2 diabetes
  • metformin
03

In context

Diabetes Mellitus, Type 2

9,359 studies on the registry are indexed under Diabetes Mellitus, Type 2; 1,318 are open to participants now.

This study's enrollment of 822 is above the median of 80 across 7,525 interventional studies indexed under Diabetes Mellitus, Type 2.

Browse Diabetes Mellitus, Type 2 studies →

Lead sponsor

AstraZeneca is the lead sponsor of 3,429 studies on the registry; 270 are open to participants now.

Of its 357 completed or terminated interventional studies of FDA-regulated products, 173 (48%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Diagnosed with type 2 diabetes
  • Treatment with metformin alone on stable doses of 1500 mg or higher per day for at least 8 weeks

Exclusion criteria

Exclusion Criteria:

  • Type 1 diabetes, history of diabetic ketoacidosis or hyperosmolar non-ketotic coma
  • Insulin therapy within one year
  • Previous treatment with DPP-4 inhibitor
05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
822 participants (actual)

Study arms

  • Experimental
    1

    saxagliptin add-on to metformin

    Drug: saxagliptin

  • Active comparator
    2

    sitagliptin add-on to metformin

    Drug: sitagliptin

Interventions

  • Drugsaxagliptin

    tablet, per oral, once daily

    Also known as: Onglyza

  • Drugsitagliptin

    capsule, per oral, once daily

    Also known as: Januvia

06

What researchers measure

Primary outcomes

  1. Hemoglobin A1c (HbA1c) Change From Baseline to Week 18

    Adjusted mean change from baseline in HbA1c achieved with saxagliptin added on to metformin versus sitagliptin added on to metformin at Week 18 (Per Protocol Analysis Set). HbA1c is a continuous measure, the change from baseline for each participant is calculated as the Week 18 value minus the baseline value.

    Time frame: Baseline, Week 18

Secondary outcomes

  1. Proportion of Patients Achieving Therapeutic Glycaemic Response Defined as HbA1c <= 6.5% at Week 18

    Proportion of Patients Achieving Therapeutic Glycaemic Response Defined as HbA1c \<= 6.5% at Week 18 (Full Analysis Set)

    Time frame: Week 18 (Last Observation Carried Forward)

  2. Fasting Plasma Glucose Change From Baseline to Week 18 (mg/dL)

    Adjusted mean change from baseline in Fasting Plasma Glucose achieved with saxagliptin added on to metformin versus sitagliptin added on to metformin at Week 18 (Full Analysis Set). Fasting Plasma Glucose is a continuous measure, the change from baseline for each participant is calculated as the Week 18 (LOCF) value minus the baseline value.

    Time frame: Baseline, Week 18 (Last Observation Carried Forward)

  3. Fasting Plasma Glucose Change From Baseline to Week 18 (mmol/L)

    Adjusted mean change from baseline in Fasting Plasma Glucose achieved with saxagliptin added on to metformin versus sitagliptin added on to metformin at Week 18 (Full Analysis Set). Fasting Plasma Glucose is a continuous measure, the change from baseline for each participant is calculated as the Week 18 (LOCF) value minus the baseline value.

    Time frame: Baseline, Week 18 (Last Observation Carried Forward)

07

Results

Posted Apr 15, 2010

Participant flow

Participant flow — Overall Study
MilestoneSaxa + MetSita + Met
Started403398
Completed365374
Not completed3824
Withdrew: Adverse event87
Withdrew: Withdrawal by subject54
Withdrew: Lost to follow-up03
Withdrew: Administrative reason by sponsor11
Withdrew: Incorrect enrollment71
Withdrew: Study specific discontinuation criteria147
Withdrew: Severe non-compliance to the protocol11
Withdrew: Safety reasons10
Withdrew: Medical history of anemia10

Outcome measures

PrimaryHemoglobin A1c (HbA1c) Change From Baseline to Week 18

Adjusted mean change from baseline in HbA1c achieved with saxagliptin added on to metformin versus sitagliptin added on to metformin at Week 18 (Per Protocol Analysis Set). HbA1c is a continuous measure, the change from baseline for each participant is calculated as the Week 18 value minus the baseline value.

Time frame:
Baseline, Week 18
Reported as:
Mean · Percent
Hemoglobin A1c (HbA1c) Change From Baseline to Week 18
PercentSaxa + MetSita + Met
Baseline7.68 ± 0.0527.69 ± 0.047
Week 187.16 ± 0.0527.07 ± 0.051
Adjusted Change from Baseline-0.52 ± 0.039-0.62 ± 0.038
Statistical analysis
  • Saxa + Met vs Sita + Met · Mean difference (net): 0.09 · 95% CI -0.01 to 0.20
SecondaryProportion of Patients Achieving Therapeutic Glycaemic Response Defined as HbA1c <= 6.5% at Week 18

Proportion of Patients Achieving Therapeutic Glycaemic Response Defined as HbA1c \<= 6.5% at Week 18 (Full Analysis Set)

Time frame:
Week 18 (Last Observation Carried Forward)
Reported as:
Number · Percentage of Participants
Proportion of Patients Achieving Therapeutic Glycaemic Response Defined as HbA1c <= 6.5% at Week 18
Percentage of ParticipantsSaxa + MetSita + Met
Proportion of Patients Achieving Therapeutic Glycaemic Response Defined as HbA1c <= 6.5% at Week 1826.329.1
Statistical analysis
  • Saxa + Met vs Sita + Met · Difference in percent: -2.8 · 95% CI -9.0 to 3.5
SecondaryFasting Plasma Glucose Change From Baseline to Week 18 (mg/dL)

Adjusted mean change from baseline in Fasting Plasma Glucose achieved with saxagliptin added on to metformin versus sitagliptin added on to metformin at Week 18 (Full Analysis Set). Fasting Plasma Glucose is a continuous measure, the change from baseline for each participant is calculated as the Week 18 (LOCF) value minus the baseline value.

Time frame:
Baseline, Week 18 (Last Observation Carried Forward)
Reported as:
Mean · mg/dL
Fasting Plasma Glucose Change From Baseline to Week 18 (mg/dL)
mg/dLSaxa + MetSita + Met
Baseline159.67 ± 2.280160.22 ± 2.192
Week 18149.04 ± 1.991143.94 ± 1.864
Adjusted Change from Baseline-10.75 ± 1.455-16.16 ± 1.464
Statistical analysis
  • Saxa + Met vs Sita + Met · Mean difference (net): 5.42 · 95% CI 1.37 to 9.47
SecondaryFasting Plasma Glucose Change From Baseline to Week 18 (mmol/L)

Adjusted mean change from baseline in Fasting Plasma Glucose achieved with saxagliptin added on to metformin versus sitagliptin added on to metformin at Week 18 (Full Analysis Set). Fasting Plasma Glucose is a continuous measure, the change from baseline for each participant is calculated as the Week 18 (LOCF) value minus the baseline value.

Time frame:
Baseline, Week 18 (Last Observation Carried Forward)
Reported as:
Mean · mmol/L
Fasting Plasma Glucose Change From Baseline to Week 18 (mmol/L)
mmol/LSaxa + MetSita + Met
Baseline8.86 ± 0.1278.89 ± 0.122
Week 188.27 ± 0.1117.99 ± 0.103
Adjusted Change from Baseline-0.60 ± 0.081-0.90 ± 0.081
Statistical analysis
  • Saxa + Met vs Sita + Met · Mean difference (net): 0.30 · 95% CI 0.08 to 0.53

Adverse events

Non-serious events are listed at a 5% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Saxa + Met—7/403 (1.7%)54/403 (13.4%)
Sita + Met—5/398 (1.3%)50/398 (12.6%)
Most frequent serious events
Showing 10 of 12
Most frequent serious events
EventSaxa + MetSita + Met
Supraventricular TachycardiaCardiac disorders1/4031/398
FallInjury, poisoning and procedural complications0/4031/398
HypoglycaemiaMetabolism and nutrition disorders0/4031/398
Hypoglycaemic UnconsciousnessMetabolism and nutrition disorders0/4031/398
Aortic AneurysmVascular disorders0/4031/398
ChillsGeneral disorders1/4030/398
Ulcer HaemorrhageGeneral disorders1/4030/398
FaecalomaGastrointestinal disorders1/4030/398
ROAD TRAFFIC ACCIDENTInjury, poisoning and procedural complications1/4030/398
HyperglycaemiaMetabolism and nutrition disorders1/4030/398
Most frequent other events
Most frequent other events
EventSaxa + MetSita + Met
Urinary Tract InfectionInfections and infestations28/40326/398
InfluenzaInfections and infestations27/40327/398

Baseline characteristics

Age Continuous
Age Continuous(years)Saxa + MetSita + MetTotal
Mean58.77 ± 10.1458.07 ± 10.5158.42 ± 10.32
Sex: Female, Male
Sex: Female, Male(Participants)Saxa + MetSita + MetTotal
Female213196409
Male190202392
08

Study locations

86 sites
  • Research Site
    Lanus, Buenos Aires, Argentina
  • Research Site
    Mar Del Plata, Buenos Aires, Argentina
  • Research Site
    Buenos Aires, Argentina
  • Research Site
    Caba, Argentina
  • Research Site
    Capital Federal, Argentina
  • Research Site
    Ciudad de Buenos Aires, Argentina
  • Research Site
    Cordoba, Argentina
  • Research Site
    Rosario, Argentina
  • Research Site
    Santa Fe, Argentina
  • Research Site
    Aalst, Belgium
  • Research Site
    Bonheiden, Belgium
  • Research Site
    Brugge, Belgium
  • Research Site
    Genk, Belgium
  • Research Site
    Gozee, Belgium
  • Research Site
    Hasselt, Belgium
  • Research Site
    Liege, Belgium
  • Research Site
    Saint-medard, Belgium
  • Research Site
    Sint-gillis-waas, Belgium
  • Research Site
    Tessenderlo, Belgium
  • Research Site
    Thuillies, Belgium
  • Research Site
    Aalborg, Denmark
  • Research Site
    Arhus, Denmark
  • Research Site
    Christiansfeld, Denmark
  • Research Site
    Farso, Denmark
  • Research Site
    Gentofte, Denmark
  • Research Site
    Hobro, Denmark
  • Research Site
    Kolding, Denmark
  • Research Site
    Rodovre, Denmark
  • Research Site
    Viborg, Denmark
  • Research Site
    Angers, France
  • Research Site
    Chateau Gontier, France
  • Research Site
    Corbeil Essonnes, France
  • Research Site
    La Seyne Sur Mer, France
  • Research Site
    Laval, France
  • Research Site
    Le Lavandou, France
  • Research Site
    Montrevault, France
  • Research Site
    Saint Cyr, France
  • Research Site
    Tierce, France
  • Research Site
    Toulon, France
  • Research Site
    Witry Les Reims, France
  • Research Site
    Bergamo, BG, Italy
  • Research Site
    Foggia, FG, Italy
  • Research Site
    Chiavari, GE, Italy
  • Research Site
    Genova, GE, Italy
  • Research Site
    Rozzano, MI, Italy
  • Research Site
    Olbia, OT, Italy
  • Research Site
    Padova, PD, Italy
  • Research Site
    Pordenone, PN, Italy
  • Research Site
    Mercato San Severino, SA, Italy
  • Research Site
    Siena, SI, Italy
  • Research Site
    Mexico, D.f., Mexico
  • Research Site
    Guadalajara, Jalisco, Mexico
  • Research Site
    Monterrey, Mexico
  • Research Site
    Alesund, Norway
  • Research Site
    Elverum, Norway
  • Research Site
    Halden, Norway
  • Research Site
    Hamar, Norway
  • Research Site
    Lierskogen, Norway
  • Research Site
    Lillehammer, Norway
  • Research Site
    Oslo, Norway
  • Research Site
    Sandvika, Norway
  • Research Site
    Strommen, Norway
  • Research Site
    Svelvik, Norway
  • Research Site
    Benoni, Gauteng, South Africa
  • Research Site
    Johannesburg, Gauteng, South Africa
  • Research Site
    Cape Town, Western Cape, South Africa
  • Research Site
    Bloemfontein, South Africa
  • Research Site
    Cape Town, South Africa
  • Research Site
    Durban, South Africa
  • Research Site
    Johannesburg, South Africa
  • Research Site
    Kwa Zulu Natal, South Africa
  • Research Site
    Pretoria, South Africa
  • Research Site
    Boras, Sweden
  • Research Site
    Degeberga, Sweden
  • Research Site
    Finspang, Sweden
  • Research Site
    Goteborg, Sweden
  • Research Site
    Jonkoping, Sweden
  • Research Site
    Odeshog, Sweden
  • Research Site
    Orebro, Sweden
  • Research Site
    Pitea, Sweden
  • Research Site
    Rattvik, Sweden
  • Research Site
    Skanor, Sweden
  • Research Site
    Timra, Sweden
  • Research Site
    Trollhattan, Sweden
  • Research Site
    Uddevalla, Sweden
  • Research Site
    Umea, Sweden
09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Apr 15, 2010, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT00666458
Lead sponsor
AstraZeneca
Collaborators
Bristol-Myers Squibb
First posted
Apr 25, 2008
Start date
Apr 2008
Primary completion
Mar 2009
Completion
Mar 2009
Results posted
Apr 15, 2010
Last update
Apr 15, 2010

Study contacts

André Scheen, Professor
principal investigator · Clinical Pharmacology Unit, Liege, Belgium
Peter Öhman, MD, PhD
study director · AstraZeneca, Wilmington, USA
Deborah Price, MSc
study chair · AstraZeneca, Wilmington, USA

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

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