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A Study for Patients With Diabetes Mellitus (IOPA)

Comparison of HbA1c in Type 1 or Type 2 Diabetic Patients Using Insulin Treated Twice Daily With Either Insulin Lispro Low Mixture or Human Insulin Mix 30/70

Status
Completed
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00420095
Acronym
IOPA
Enrollment
117
Registered
2007-01-09
Start date
2007-01-31
Completion date
2008-01-31
Last updated
2009-06-17

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

Conditions

Diabetes Mellitus, Type 1, Diabetes Mellitus, Type 2

Keywords

diabetes, type 1, type 2

Brief summary

The purpose of this study is to compare glycemic control (HbA1c) in Chinese patients with type 1 or type 2 diabetes when treated with insulin lispro low mixture and human insulin 30/70.

Interventions

Patient adjusted dose, twice daily (BID), injected subcutaneous (SC) x 12 weeks

DRUGInsulin lispro low mix

Patient adjusted dose, twice daily (BID), injected subcutaneous (SC) x 12 weeks

Sponsors

Eli Lilly and Company
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to 70 Years
Healthy volunteers
No

Inclusion criteria

* Clinically diagnosed type 1or type 2 diabetes for at least 2 months * Aged between 18 and 70 (inclusive) * Have been treated with human insulin mix 30/70 twice daily for at least 2 months prior to entering the study * Have glycosylated hemoglobin (Hb1Ac) between 1.2 and 1.7 times the upper limit of normal reference range within 2 weeks prior to or at Visit 1 * Compliance with diet and insulin therapy and performs regular blood glucose monitoring

Exclusion criteria

* Have used oral antidiabetic agents within 30 days prior to entry into the study * Receive a total daily dose of insulin \>2 units/kilogram * Have had more than two episodes of severe hypoglycemia within 6 months prior to entry into the study * Have a body mass index \>35 kilograms per square meter (kg/m2) * Receive chronic systemic glucocorticoid therapy

Design outcomes

Primary

MeasureTime frameDescription
Glycosylated Hemoglobin (HbA1c) Value at 12 Week EndpointBaseline and 12 weeks of each treatmentGlycosylated hemoglobin reflects the average blood glucose level over the previous 12 weeks of treatment.

Secondary

MeasureTime frameDescription
Change in Fasting Blood Glucose Values From Baseline to 12 Weeks of TreatmentBaseline and 12 weeks of each treatmentValues obtained after at least an 8 hour fast. Change = Baseline - Endpoint
Change in Total Daily Insulin Dose Values From Baseline to 12 Weeks of TreatmentBaseline and 12 weeks of each treatmentInsulin lispro low mix was to be administered within 15 minutes of morning and evening meals. Human insulin mix 30/70 was to be administered within 30 minutes of morning and evening meals. Change = Baseline - Endpoint
Changes in Glycosylated Hemoglobin (HbA1c) From Baseline to 12 Weeks of TreatmentBaseline and at 12 weeks of each treatmentChanges in glycosylated hemoglobin reflect the change in average blood glucose level between baseline and 12 weeks of treatment. Change = Baseline - Endpoint.
Number of Participants With Laboratory Parameters Significantly Different From BaselineBaseline and 12 weeks of each treatmentNumber of participants with laboratory parameters (hematology, chemistry, and urinalysis) that were significantly different from baseline after 12 weeks of each treatment.
Hypoglycemia Rate Per Participant Per 30 Daysover 12 weeks of each treatment periodHypoglycemia rate per patient per 30 days = (number of reported hypogylcemia events/number of days within the period) \* 30 days. Since this was a 2x2 cross-over design (2 treatments and 2 periods), then the hypogyclemia rate was calculated per patient for each of the 2 periods by treatment.
Number of Participants Achieving Target Glycosylated Hemoglobin (HbA1c) Values <=7% and <=6.5%12 weeks of each treatmentNumber of patients in each treatment group achieving the target HbA1c value during 12 weeks of each treatment.

Countries

China

Participant flow

Participants by arm

ArmCount
Human Insulin Mix 30/70 First, Then Insulin Lispro Low Mix
Human insulin mix 30/70 for 12 weeks followed by insulin lispro low mix for 12 weeks
57
Insulin Lispro Low Mix First, Then Human Insulin Mix 30/70
Insulin lispro low mix for 12 weeks followed by human insulin mix 30/70 for 12 weeks
60
Total117

Withdrawals & dropouts

PeriodReasonFG000FG001
Overall StudyAdverse Event10
Overall StudyLost to Follow-up10
Overall StudyProtocol Violation11

Baseline characteristics

CharacteristicInsulin Lispro Low Mix First, Then Human Insulin Mix 30/70TotalHuman Insulin Mix 30/70 First, Then Insulin Lispro Low Mix
Age Continuous54.5 years
STANDARD_DEVIATION 10.75
54.2 years
STANDARD_DEVIATION 10.71
53.9 years
STANDARD_DEVIATION 10.75
Baseline Fasting Blood Glucose9.15 millimole/Liter
STANDARD_DEVIATION 3.2
9.32 millimole/Liter
STANDARD_DEVIATION 2.942
9.49 millimole/Liter
STANDARD_DEVIATION 2.66
Baseline Glycosylated Hemoglobin8.59 percent of glycosylated hemoglobin
STANDARD_DEVIATION 1.573
8.58 percent of glycosylated hemoglobin
STANDARD_DEVIATION 1.442
8.56 percent of glycosylated hemoglobin
STANDARD_DEVIATION 1.304
Body Mass Index24.58 kilogram per meter squared
STANDARD_DEVIATION 2.754
24.98 kilogram per meter squared
STANDARD_DEVIATION 3.045
25.40 kilogram per meter squared
STANDARD_DEVIATION 3.297
Duration of Diabetes130.3 months
STANDARD_DEVIATION 78.31
130.1 months
STANDARD_DEVIATION 86.78
129.8 months
STANDARD_DEVIATION 95.61
Duration of Insulin Treatment39.0 months
STANDARD_DEVIATION 32.37
38.8 months
STANDARD_DEVIATION 34.77
38.6 months
STANDARD_DEVIATION 37.41
Other Treatments for Diabetes Prior to Study
No
37 participants72 participants35 participants
Other Treatments for Diabetes Prior to Study
Yes
23 participants45 participants22 participants
Race/Ethnicity
Han - the main ethnic origin in China
60 participants117 participants57 participants
Region of Enrollment
China
60 participants117 participants57 participants
Sex: Female, Male
Female
35 Participants66 Participants31 Participants
Sex: Female, Male
Male
25 Participants51 Participants26 Participants
Type of Diabetes
Type 1
7 participants9 participants2 participants
Type of Diabetes
Type 2
53 participants108 participants55 participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
— / —— / —
other
Total, other adverse events
19 / —23 / —
serious
Total, serious adverse events
2 / —1 / —

Outcome results

Primary

Glycosylated Hemoglobin (HbA1c) Value at 12 Week Endpoint

Glycosylated hemoglobin reflects the average blood glucose level over the previous 12 weeks of treatment.

Time frame: Baseline and 12 weeks of each treatment

Population: Includes all randomized patients who completed the study with no major protocol violations. Crossover study design allows for the comparison of the effect of two treatments on the same patients, each patient served as own control for between-treatment comparisons. The data from two periods were combined and analyzed.

ArmMeasureValue (MEAN)Dispersion
Human Insulin Mix 30/70Glycosylated Hemoglobin (HbA1c) Value at 12 Week Endpoint7.91 percent of glycosylated hemoglobin95% Confidence Interval 1.158
Insulin Lispro Low MixGlycosylated Hemoglobin (HbA1c) Value at 12 Week Endpoint7.96 percent of glycosylated hemoglobin95% Confidence Interval 1.373
Comparison: Mixed model where period, sequence, treatment are fixed effects and patient within sequence are random effects.p-value: 0.49795% CI: [-0.2, 0.1]Mixed Models Analysis
Secondary

Change in Fasting Blood Glucose Values From Baseline to 12 Weeks of Treatment

Values obtained after at least an 8 hour fast. Change = Baseline - Endpoint

Time frame: Baseline and 12 weeks of each treatment

Population: Includes all randomized patients who completed the study with no major protocol violations. Crossover study design allows for the comparison of the effect of two treatments on the same patients, each patient served as own control for between-treatment comparisons. The data from two periods were combined and analyzed. LOCF within each period.

ArmMeasureValue (MEAN)
Human Insulin Mix 30/70Change in Fasting Blood Glucose Values From Baseline to 12 Weeks of Treatment1.04 millimoles/Liter
Insulin Lispro Low MixChange in Fasting Blood Glucose Values From Baseline to 12 Weeks of Treatment1.18 millimoles/Liter
p-value: 0.41995% CI: [-0.48, 0.2]Mixed Models Analysis
Secondary

Change in Total Daily Insulin Dose Values From Baseline to 12 Weeks of Treatment

Insulin lispro low mix was to be administered within 15 minutes of morning and evening meals. Human insulin mix 30/70 was to be administered within 30 minutes of morning and evening meals. Change = Baseline - Endpoint

Time frame: Baseline and 12 weeks of each treatment

Population: Includes all randomized patients who completed the study with no major protocol violations. Crossover study design allows for the comparison of the effect of two treatments on the same patients, each patient served as own control for between-treatment comparisons. The data from two periods were combined and analyzed. LOCF within each period.

ArmMeasureValue (MEAN)
Human Insulin Mix 30/70Change in Total Daily Insulin Dose Values From Baseline to 12 Weeks of Treatment-4.72 units of insulin
Insulin Lispro Low MixChange in Total Daily Insulin Dose Values From Baseline to 12 Weeks of Treatment-4.56 units of insulin
p-value: 0.74195% CI: [-1.09, 0.78]Mixed Models Analysis
Secondary

Changes in Glycosylated Hemoglobin (HbA1c) From Baseline to 12 Weeks of Treatment

Changes in glycosylated hemoglobin reflect the change in average blood glucose level between baseline and 12 weeks of treatment. Change = Baseline - Endpoint.

Time frame: Baseline and at 12 weeks of each treatment

Population: Includes all randomized patients who completed the study with no major protocol violations. Crossover study design allows for the comparison of the effect of two treatments on the same patients, each patient served as own control for between-treatment comparisons. The data from two periods were combined and analyzed.

ArmMeasureValue (MEAN)
Human Insulin Mix 30/70Changes in Glycosylated Hemoglobin (HbA1c) From Baseline to 12 Weeks of Treatment0.68 percent of glycosylated hemoglobin
Insulin Lispro Low MixChanges in Glycosylated Hemoglobin (HbA1c) From Baseline to 12 Weeks of Treatment0.63 percent of glycosylated hemoglobin
p-value: 0.49795% CI: [-0.1, 0.2]Mixed Models Analysis
Secondary

Hypoglycemia Rate Per Participant Per 30 Days

Hypoglycemia rate per patient per 30 days = (number of reported hypogylcemia events/number of days within the period) \* 30 days. Since this was a 2x2 cross-over design (2 treatments and 2 periods), then the hypogyclemia rate was calculated per patient for each of the 2 periods by treatment.

Time frame: over 12 weeks of each treatment period

Population: Includes all randomized patients who had at least one dose. Crossover study design allows for the comparison of the effect of two treatments on the same patients, each patient served as own control for between-treatment comparisons. The data from two periods were combined and analyzed.

ArmMeasureValue (MEAN)
Human Insulin Mix 30/70Hypoglycemia Rate Per Participant Per 30 Days0.34 events/30 days
Insulin Lispro Low MixHypoglycemia Rate Per Participant Per 30 Days0.37 events/30 days
p-value: 0.6795% CI: [-0.16, 0.11]Mixed Models Analysis
Secondary

Number of Participants Achieving Target Glycosylated Hemoglobin (HbA1c) Values <=7% and <=6.5%

Number of patients in each treatment group achieving the target HbA1c value during 12 weeks of each treatment.

Time frame: 12 weeks of each treatment

Population: Includes all randomized patients who completed the study with no major protocol violations. Crossover study design allows for the comparison of the effect of two treatments on the same patients, each patient served as own control for between-treatment comparisons. The data from two periods were combined and analyzed.

ArmMeasureGroupValue (NUMBER)
Human Insulin Mix 30/70Number of Participants Achieving Target Glycosylated Hemoglobin (HbA1c) Values <=7% and <=6.5%HbA1c <=7%26 participants
Human Insulin Mix 30/70Number of Participants Achieving Target Glycosylated Hemoglobin (HbA1c) Values <=7% and <=6.5%HbA1c <=6.5%11 participants
Insulin Lispro Low MixNumber of Participants Achieving Target Glycosylated Hemoglobin (HbA1c) Values <=7% and <=6.5%HbA1c <=7%30 participants
Insulin Lispro Low MixNumber of Participants Achieving Target Glycosylated Hemoglobin (HbA1c) Values <=7% and <=6.5%HbA1c <=6.5%14 participants
p-value: 0.644Fisher Exact
p-value: 0.672Fisher Exact
Secondary

Number of Participants With Laboratory Parameters Significantly Different From Baseline

Number of participants with laboratory parameters (hematology, chemistry, and urinalysis) that were significantly different from baseline after 12 weeks of each treatment.

Time frame: Baseline and 12 weeks of each treatment

Population: Includes all randomized patients receiving at least one dose. Crossover study design allows for the comparison of the effect of two treatments on the same patients, each patient served as own control for between-treatment comparisons. The data from two periods were combined and analyzed.

ArmMeasureGroupValue (NUMBER)
Human Insulin Mix 30/70Number of Participants With Laboratory Parameters Significantly Different From BaselineHematology - Significantly Different from Baseline0 participants
Human Insulin Mix 30/70Number of Participants With Laboratory Parameters Significantly Different From BaselineChemistry - Significantly Different from Baseline0 participants
Human Insulin Mix 30/70Number of Participants With Laboratory Parameters Significantly Different From BaselineUrinalysis - Significantly Different from Baseline0 participants
Insulin Lispro Low MixNumber of Participants With Laboratory Parameters Significantly Different From BaselineHematology - Significantly Different from Baseline0 participants
Insulin Lispro Low MixNumber of Participants With Laboratory Parameters Significantly Different From BaselineChemistry - Significantly Different from Baseline0 participants
Insulin Lispro Low MixNumber of Participants With Laboratory Parameters Significantly Different From BaselineUrinalysis - Significantly Different from Baseline0 participants

Source: ClinicalTrials.gov · Data processed: Mar 9, 2026