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Efficacy and Safety of Basal-bolus Therapy, Comparing Stepwise Addition of Insulin Aspart Versus Complete Basal-bolus Regimen

A Randomised, Controlled, Open Label, Multicentre, Multinational, Treat-to-target Trial Investigating the Efficacy and Safety of Intensification With Addition of Bolus Insulin Aspart in Subjects With Type 2 Diabetes Inadequately Controlled on Basal Insulin With or Without Oral Anti-diabetic Drugs: Step-wise Addition Versus Complete Basal-bolus Therapy

Status
Completed
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT01165684
Acronym
Full STEP™
Enrollment
401
Registered
2010-07-20
Start date
2010-10-31
Completion date
2012-04-30
Last updated
2017-02-17

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Diabetes, Diabetes Mellitus, Type 2

Brief summary

This trial is conducted in Europe, and North and South America. The aim of this clinical trial is to investigate if the two treatments are equally effective.

Interventions

DRUGinsulin aspart

Insulin aspart added stepwise according to the largest meal following an evaluation of HbA1c. Doses individually adjusted.

DRUGinsulin detemir

Insulin detemir as basal insulin, adminstered once daily. Doses individually adjusted.

Sponsors

Novo Nordisk A/S
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Type 2 diabetes (diagnosed clinically) for at least 12 months * Basal insulin treatment (NPH once or twice daily, insulin glargine once daily or insulin detemir once daily) for at least 6 months * HbA1c: 7.0-9.0 % (both inclusive) by central laboratory analysis (one retest analysed at the central laboratory within a week is permitted with the result of the last sample being conclusive) * BMI (Body Mass Index) less than 40.0 kg/m\^2

Exclusion criteria

* Previous use of pre-mix or bolus insulin (allowed is previous use of bolus insulin only in case of a hospitalisation or a severe condition requiring intermittent use of bolus insulin for less than 14 consecutive days, but not during the last 6 months prior to screening visit (Visit 1) * Use of GLP-1 (Glucagon-like peptide-1) receptor agonists or pramlintide within the last 6 months prior to prior to screening visit (Visit 1) * Anticipated change in concomitant medication known to interfere significantly with glucose metabolism (e.g. systemic corticosteroids, beta-blockers, MAO (Monoamine oxidase) inhibitors, etc.) * Cardiovascular disease, within the last 12 months prior to screening visit (Visit 1), defined as: stroke; decompensated heart failure New York Heart Association (NYHA) class III or IV; myocardial infarction; unstable angina pectoris; or coronary arterial bypass graft or angioplasty * Uncontrolled treated/untreated severe hypertension (systolic blood pressure sitting at least 180 millimetre (mm) mercury (Hg) and/or diastolic blood pressure at least 100 mmHg). For Argentina: systolic blood pressure sitting at least 150 mmHg and/or diastolic blood pressure at least 90 mmHg * Impaired liver function, defined as ALAT (Alanine aminotransferase) at least 2.5 times upper limit of normal (one retest analysed at the central laboratory within a week is permitted with the result of the last sample being conclusive) * Impaired renal function defined as serum creatinine above 135 micromol/L (above 1.5 mg/dL) for males and above 110 micromol/L (above 1.2 mg/dL) for females; and, if required by the locally applicable metformin label, glomerular filtration rate below 60 ml/min, calculated by the Cockroft & Gault formula). One retest within a week is permitted with the result of the last sample being conclusive * Recurrent severe hypoglycaemia (more than 1 severe hypoglycaemic episode, during the last 12 months) or hypoglycaemic unawareness as judged by the Investigator or hospitalisation for diabetic ketoacidosis during the previous 6 months * Proliferative retinopathy or maculopathy requiring treatment according to the Investigator * Treatment with OADs (Oral anti-diabetic drug) contraindicated or unapproved for combination treatment with insulin (according to local OAD label)

Design outcomes

Primary

MeasureTime frameDescription
Change in Glycosylated Haemoglobin (HbA1c) From Baseline to Week 32Week 0, Week 32Estimated mean change from baseline in HbA1c after 32 Weeks of treatment

Secondary

MeasureTime frameDescription
Change in Glycosylated Haemoglobin (HbA1c) From Baseline to Week 21Week 0, Week 21Estimated mean change from baseline in HbA1c after 21 Weeks of treatment
Proportion of Subjects Reaching Glycosylated Haemoglobin (HbA1c) Below 7.0% at Week 10Week 10Proportion of subjects reaching HbA1c below 7.0% at Week 10
Proportion of Subjects Reaching Glycosylated Haemoglobin (HbA1c) Below 7.0% at Week 21Week 21Proportion of subjects reaching HbA1c below 7.0% at Week 21
Proportion of Subjects Reaching Glycosylated Haemoglobin (HbA1c) Below 7.0% at Week 32Week 32Proportion of subjects reaching HbA1c below 7.0% at Week 32
Fasting Plasma Glucose (FPG) at Week 10Week 10Mean FPG at Week 10
Fasting Plasma Glucose (FPG) at Week 21Week 21Mean FPG at Week 21
Change in Glycosylated Haemoglobin (HbA1c) From Baseline to Week 10Week 0, Week 10Estimated mean change from baseline in HbA1c after 10 Weeks of treatment
Mean Plasma Glucose Increment Over 3 Meals (Breakfast, Lunch and Dinner) at Week 10Week 10Mean plasma glucose increment over 3 meals (breakfast, lunch and dinner) at Week 10
Mean Plasma Glucose Increment Over 3 Meals (Breakfast, Lunch and Dinner) at Week 21Week 21Mean plasma glucose increment over 3 meals (breakfast, lunch and dinner) at Week 21
Mean Plasma Glucose Increment Over 3 Meals (Breakfast, Lunch and Dinner) at Week 32Week 32Estimated mean plasma glucose increment over 3 meals (breakfast, lunch and dinner) at Week 32
Body Weight at Week 32Week 32Estimated mean body weight after 32 Weeks of treatment
Body Mass Index (BMI) at Week 32Week 32Estimated mean BMI after 32 Weeks of treatment
Hypoglycaemic Episodes (Rate of All Treatment Emergent Hypoglycaemia Episodes)Week 0 to Week 32A hypoglycaemic episode was defined as treatment emergent if the onset of the episode was on or after the first day of exposure to randomised treatment and no later than 1 day after the last day of randomised treatment.
Fasting Plasma Glucose (FPG) at Week 32Week 32Estimated Mean FPG at Week 32

Countries

Argentina, Brazil, Canada, France, North Macedonia, Slovenia, United States

Participant flow

Recruitment details

The trial was conducted at 69 sites in 7 countries: Argentina (7), Brazil (5), Canada (12), France (7), Macedonia (1), Slovenia (4), and the US (31). Of 12 sites in Canada, one site (Site 303) closed early on 07-Mar-2011.

Pre-assignment details

Subjects on pre-trial metformin and pioglitazone continued their medication.

Participants by arm

ArmCount
Step-wise
In addition to insulin detemir once daily, insulin aspart was added step-wise starting at the randomisation visit (Week 0) with the first bolus before the largest meal, followed by a second bolus at the second largest meal at Week 11 in subjects with HbA1c ≥ 7.0% at Week 10, and a second or third bolus at Week 22 in subjects with HbA1c ≥ 7.0% at Week 21. Subjects on pre-trial metformin and pioglitazone continued their medication.
201
Basal-bolus
In addition to insulin detemir once daily, insulin aspart was added before each of the main meals (breakfast, lunch and dinner) starting at the randomisation visit. Subjects on pre-trial metformin and pioglitazone continued their medication.
200
Total401

Withdrawals & dropouts

PeriodReasonFG000FG001
Overall StudyAdverse Event11
Overall StudyLack of Efficacy21
Overall StudyProtocol Violation715
Overall StudyUnclassified1622
Overall StudyWithdrawal Criteria213

Baseline characteristics

CharacteristicStep-wiseBasal-bolusTotal
Age, Continuous60.0 years
STANDARD_DEVIATION 9.1
59.6 years
STANDARD_DEVIATION 9.5
59.8 years
STANDARD_DEVIATION 9.3
Body Mass Index (BMI)31.5 kg/m^2
STANDARD_DEVIATION 4.8
30.7 kg/m^2
STANDARD_DEVIATION 4.6
31.1 kg/m^2
STANDARD_DEVIATION 4.7
Body weight88.9 kg
STANDARD_DEVIATION 18.7
86.1 kg
STANDARD_DEVIATION 15.2
87.5 kg
STANDARD_DEVIATION 17.1
Fasting plasma glucose (FPG)7.0 mmol/L
STANDARD_DEVIATION 1.9
6.9 mmol/L
STANDARD_DEVIATION 1.6
6.9 mmol/L
STANDARD_DEVIATION 1.8
Gender
Female
97 Participants101 Participants198 Participants
Gender
Male
104 Participants99 Participants203 Participants
Glycosylated haemoglobin (HbA1c)7.9 percentage of glycosylated haemoglobin
STANDARD_DEVIATION 0.6
7.9 percentage of glycosylated haemoglobin
STANDARD_DEVIATION 0.6
7.9 percentage of glycosylated haemoglobin
STANDARD_DEVIATION 0.6

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
— / —— / —
other
Total, other adverse events
40 / 19847 / 199
serious
Total, serious adverse events
18 / 19815 / 199

Outcome results

Primary

Change in Glycosylated Haemoglobin (HbA1c) From Baseline to Week 32

Estimated mean change from baseline in HbA1c after 32 Weeks of treatment

Time frame: Week 0, Week 32

Population: Full analysis set (FAS) included all randomised subjects and missing data were imputed using last observation carried forward (LOCF). 383 subjects contributed to the statistical analysis at Week 32.

ArmMeasureValue (MEAN)Dispersion
Step-wiseChange in Glycosylated Haemoglobin (HbA1c) From Baseline to Week 32-0.98 percentage of glycosylated haemoglobinStandard Error 0.06
Basal-bolusChange in Glycosylated Haemoglobin (HbA1c) From Baseline to Week 32-1.12 percentage of glycosylated haemoglobinStandard Error 0.06
p-value: 0.08895% CI: [-0.02, 0.3]Regression, Linear
Secondary

Body Mass Index (BMI) at Week 32

Estimated mean BMI after 32 Weeks of treatment

Time frame: Week 32

Population: Full analysis set (FAS) included all randomised subjects and missing data were imputed using last observation carried forward (LOCF). 378 subjects contributed to the statistical analysis at Week 32.

ArmMeasureValue (MEAN)Dispersion
Step-wiseBody Mass Index (BMI) at Week 3231.86 kg/m^2Standard Error 0.1
Basal-bolusBody Mass Index (BMI) at Week 3232.03 kg/m^2Standard Error 0.1
p-value: 0.22495% CI: [-0.45, 0.11]Regression, Linear
Secondary

Body Weight at Week 32

Estimated mean body weight after 32 Weeks of treatment

Time frame: Week 32

Population: Full analysis set (FAS) included all randomised subjects and missing data were imputed using last observation carried forward (LOCF). 378 subjects contributed to the statistical analysis at Week 32.

ArmMeasureValue (MEAN)Dispersion
Step-wiseBody Weight at Week 3289.32 kgStandard Error 0.28
Basal-bolusBody Weight at Week 3289.80 kgStandard Error 0.28
p-value: 0.22895% CI: [-1.25, 0.3]Regression, Linear
Secondary

Change in Glycosylated Haemoglobin (HbA1c) From Baseline to Week 10

Estimated mean change from baseline in HbA1c after 10 Weeks of treatment

Time frame: Week 0, Week 10

Population: Full analysis set (FAS) included all randomised subjects and missing data were imputed using last observation carried forward (LOCF). 376 subjects contributed to the statistical analysis at Week 10.

ArmMeasureValue (MEAN)Dispersion
Step-wiseChange in Glycosylated Haemoglobin (HbA1c) From Baseline to Week 10-0.45 percentage of glycosylated haemoglobinStandard Error 0.05
Basal-bolusChange in Glycosylated Haemoglobin (HbA1c) From Baseline to Week 10-1.00 percentage of glycosylated haemoglobinStandard Error 0.05
p-value: <0.00195% CI: [0.42, 0.69]Regression, Linear
Secondary

Change in Glycosylated Haemoglobin (HbA1c) From Baseline to Week 21

Estimated mean change from baseline in HbA1c after 21 Weeks of treatment

Time frame: Week 0, Week 21

Population: Full analysis set (FAS) included all randomised subjects and missing data were imputed using last observation carried forward (LOCF). 383 subjects contributed to the statistical analysis at Week 21.

ArmMeasureValue (MEAN)Dispersion
Step-wiseChange in Glycosylated Haemoglobin (HbA1c) From Baseline to Week 21-0.78 percentage of glycosylated haemoglobinStandard Error 0.06
Basal-bolusChange in Glycosylated Haemoglobin (HbA1c) From Baseline to Week 21-1.15 percentage of glycosylated haemoglobinStandard Error 0.06
p-value: <0.00195% CI: [0.21, 0.53]Regression, Linear
Secondary

Fasting Plasma Glucose (FPG) at Week 10

Mean FPG at Week 10

Time frame: Week 10

Population: Full analysis set (FAS) included all randomised subjects and missing data were imputed using last observation carried forward (LOCF). 368 subjects contributed to data at Week 10.

ArmMeasureValue (MEAN)Dispersion
Step-wiseFasting Plasma Glucose (FPG) at Week 107.1 mmol/LStandard Deviation 1.9
Basal-bolusFasting Plasma Glucose (FPG) at Week 106.7 mmol/LStandard Deviation 1.9
Secondary

Fasting Plasma Glucose (FPG) at Week 21

Mean FPG at Week 21

Time frame: Week 21

Population: Full analysis set (FAS) included all randomised subjects and missing data were imputed using last observation carried forward (LOCF). 383 subjects contributed to the data at Week 21.

ArmMeasureValue (MEAN)Dispersion
Step-wiseFasting Plasma Glucose (FPG) at Week 217.1 mmol/LStandard Deviation 2.3
Basal-bolusFasting Plasma Glucose (FPG) at Week 217.0 mmol/LStandard Deviation 2.3
Secondary

Fasting Plasma Glucose (FPG) at Week 32

Estimated Mean FPG at Week 32

Time frame: Week 32

Population: Full analysis set (FAS) included all randomised subjects and missing data were imputed using last observation carried forward (LOCF). 383 subjects contributed to the statistical analysis at Week 32.

ArmMeasureValue (MEAN)Dispersion
Step-wiseFasting Plasma Glucose (FPG) at Week 327.12 mmol/LStandard Error 0.17
Basal-bolusFasting Plasma Glucose (FPG) at Week 327.01 mmol/LStandard Error 0.17
p-value: 0.63595% CI: [-0.37, 0.6]Regression, Linear
Secondary

Hypoglycaemic Episodes (Rate of All Treatment Emergent Hypoglycaemia Episodes)

A hypoglycaemic episode was defined as treatment emergent if the onset of the episode was on or after the first day of exposure to randomised treatment and no later than 1 day after the last day of randomised treatment.

Time frame: Week 0 to Week 32

Population: Safety analysis set includes all subjects who received at least one dose of the investigational product or its comparator. 397 subjects contributed with data.

ArmMeasureValue (NUMBER)
Step-wiseHypoglycaemic Episodes (Rate of All Treatment Emergent Hypoglycaemia Episodes)33.47 Episodes /year of patient exposure
Basal-bolusHypoglycaemic Episodes (Rate of All Treatment Emergent Hypoglycaemia Episodes)57.56 Episodes /year of patient exposure
Secondary

Mean Plasma Glucose Increment Over 3 Meals (Breakfast, Lunch and Dinner) at Week 10

Mean plasma glucose increment over 3 meals (breakfast, lunch and dinner) at Week 10

Time frame: Week 10

Population: Full analysis set (FAS) included all randomised subjects and missing data were imputed using last observation carried forward (LOCF). 326 subjects contributed to the data at Week 10.

ArmMeasureValue (MEAN)Dispersion
Step-wiseMean Plasma Glucose Increment Over 3 Meals (Breakfast, Lunch and Dinner) at Week 102.3 mmol/LStandard Deviation 2.2
Basal-bolusMean Plasma Glucose Increment Over 3 Meals (Breakfast, Lunch and Dinner) at Week 101.4 mmol/LStandard Deviation 2
Secondary

Mean Plasma Glucose Increment Over 3 Meals (Breakfast, Lunch and Dinner) at Week 21

Mean plasma glucose increment over 3 meals (breakfast, lunch and dinner) at Week 21

Time frame: Week 21

Population: Full analysis set (FAS) included all randomised subjects and missing data were imputed using last observation carried forward (LOCF). 343 subjects contributed to the data at Week 21.

ArmMeasureValue (MEAN)Dispersion
Step-wiseMean Plasma Glucose Increment Over 3 Meals (Breakfast, Lunch and Dinner) at Week 211.9 mmol/LStandard Deviation 1.8
Basal-bolusMean Plasma Glucose Increment Over 3 Meals (Breakfast, Lunch and Dinner) at Week 211.5 mmol/LStandard Deviation 1.8
Secondary

Mean Plasma Glucose Increment Over 3 Meals (Breakfast, Lunch and Dinner) at Week 32

Estimated mean plasma glucose increment over 3 meals (breakfast, lunch and dinner) at Week 32

Time frame: Week 32

Population: Full analysis set (FAS) included all randomised subjects and missing data were imputed using last observation carried forward (LOCF). 352 subjects contributed to the statistical analysis at Week 32.

ArmMeasureValue (MEAN)Dispersion
Step-wiseMean Plasma Glucose Increment Over 3 Meals (Breakfast, Lunch and Dinner) at Week 321.64 mmol/LStandard Deviation 0.12
Basal-bolusMean Plasma Glucose Increment Over 3 Meals (Breakfast, Lunch and Dinner) at Week 321.28 mmol/LStandard Deviation 0.13
p-value: 0.04695% CI: [0.01, 0.71]Regression, Linear
Secondary

Proportion of Subjects Reaching Glycosylated Haemoglobin (HbA1c) Below 7.0% at Week 10

Proportion of subjects reaching HbA1c below 7.0% at Week 10

Time frame: Week 10

Population: Full analysis set (FAS) included all randomised subjects and missing data were imputed using last observation carried forward (LOCF). 376 subjects contributed to the statistical analysis at Week 10.

ArmMeasureValue (NUMBER)
Step-wiseProportion of Subjects Reaching Glycosylated Haemoglobin (HbA1c) Below 7.0% at Week 1019.2 percentage (%) of subjects
Basal-bolusProportion of Subjects Reaching Glycosylated Haemoglobin (HbA1c) Below 7.0% at Week 1056.3 percentage (%) of subjects
p-value: <0.00195% CI: [4.12, 11.39]Regression, Logistic
Secondary

Proportion of Subjects Reaching Glycosylated Haemoglobin (HbA1c) Below 7.0% at Week 21

Proportion of subjects reaching HbA1c below 7.0% at Week 21

Time frame: Week 21

Population: Full analysis set (FAS) included all randomised subjects and missing data were imputed using last observation carried forward (LOCF). 383 subjects contributed to the statistical analysis at Week 21.

ArmMeasureValue (NUMBER)
Step-wiseProportion of Subjects Reaching Glycosylated Haemoglobin (HbA1c) Below 7.0% at Week 2145.1 percentage (%) of subjects
Basal-bolusProportion of Subjects Reaching Glycosylated Haemoglobin (HbA1c) Below 7.0% at Week 2165.4 percentage (%) of subjects
p-value: <0.00195% CI: [1.56, 3.64]Regression, Logistic
Secondary

Proportion of Subjects Reaching Glycosylated Haemoglobin (HbA1c) Below 7.0% at Week 32

Proportion of subjects reaching HbA1c below 7.0% at Week 32

Time frame: Week 32

Population: Full analysis set (FAS) included all randomised subjects and missing data were imputed using last observation carried forward (LOCF). 383 subjects contributed to the statistical analysis at Week 32.

ArmMeasureValue (NUMBER)
Step-wiseProportion of Subjects Reaching Glycosylated Haemoglobin (HbA1c) Below 7.0% at Week 3255.9 percentage (%) of subjects
Basal-bolusProportion of Subjects Reaching Glycosylated Haemoglobin (HbA1c) Below 7.0% at Week 3263.3 percentage (%) of subjects
p-value: 0.14695% CI: [0.9, 2.07]Regression, Logistic

Source: ClinicalTrials.gov · Data processed: Mar 22, 2026