Levemir Clinical Studies Flashcards
STUDY: Question
Answer
HEISE 2004: POPULATION, AIM OF STUDY, AND PRODUCTS STUDIED
T1D; CLAMP STUDY; WITHIN SUBJECT VARIABILITY; NPH, GLARGINE, AND DETEMIR. 54 randomized (32 males, 22 females) but only 51 completers.
HEISE 2004: WAS IT CROSSOVER OR PARALLEL GROUP? RANDOMIZED? HOW MANY CENTERS?
Double-blind, Randomized, Parallel group, Involved a “clamp procedure” and the following 3 treatment groups, detemir, glargine, NPH; Single-center
HEISE 2004: What were the inclusion or exclusion criteria?
Note that this study does not explicitly state inclusion or exclusion criteria. Simply describes patient population.
HEISE 2004: The goal of this study was to compare __________ (within subject, inter subject) variability of the glucose-lowering effect between insulin detemir, NPH insulin, and insulin glargine in patients with __________ (type1, type 2) diabetes.
Within-subject; type 1
HEISE 2004: A1c of the patients were about: 7, 7.5, or 8
about 7.5
HEISE 2004: Duration of diabetes was about: 10, 15, or 20 years
about 20
HEISE 2004: Were the patients overweight?
No.
HEISE 2004: How many patients were in each arm: 10-15, 15-20, 20-25, greater than 25
54 subjects randomized; 51 subjects completed the trial: 18 on insulin detemir, 17 on NPH insulin, and 16 on insulin glargine
HEISE 2004: How many dosing days? How did patients prep for the dosing days?
4 days of dosing. On the first day, they were randomized to receive 1 of 3 trial drugs for the remainder of the trial. On each dosing day, subjects reported to the study site the morning after an overnight fast.
HEISE 2004: T or F: Variability with insulin detemir was 27% compared to 59% with NPH and 46% with glargine.
TRUE. But this was the variability over 12 hours. The 24 hour variability was 27%, 68%, and 48% for detemir, NPH, and glargine and are the more important values to recall.
HEISE 2004: What was the clamp glucose (80, 90, or 100mg/dL)? How long clamped at this before getting study drug?
Biostator at least 4 hours before study drug with blood glucose target value of 100 mg/dL (“clamp” procedure)
HEISE 2004: What type of insulin was given with the Biostator?
Human regular IV
HEISE 2004: T or F: This trial was too small to show statistical significance.
FALSE
HEISE 2004: When was the last time basal insulin could be given prior study drug? Short or rapid acting?
basal insulin could be taken 12-24 hours before trial drug administration, whereas no insulin could be taken the morning of the dosing day
HEISE 2004: What was the interval between study days?
5 to 21 days
HEISE 2004: When was the clamp ended?
24 hours or earlier if the blood glucose increased to greater than 200 mg/dL without any glucose having been administered for at least 30 minutes
HEISE 2004: What was the primary endpoint?
Not stated explicitly. Measured and compared 5 PD and 3 PK endpoints.
HEISE 2004: What were the overall differences in within subject variability (CV) for the GIR-AUC[0-24 h]?
Overall, the GIR profiles for insulin detemir were generally more consistent. within-subject variability over 24 hours (ie, GIR-AUC[0–24 h]) was significantly lower for insulin detemir compared with NPH insulin and insulin glargine (27% vs 68% vs 48%)
HEISE 2004: Why was a limitation the fixed dose of 0.4 units/kg?
The CV might be different for different dose levels. However, the comparisons are based on the the ratio of CVs and therefore unlikely to be affected by dose levels.
HEISE 2004: According to Heise, what is the concentration of detemir in 1 unit of insulin: 6, 8, 12, or 24 nmol/L? How does that compare to glargine, NPH and regular insulin.
24 nmol/L. COMMENT: Technically, detemir is 2400 nmol/mL. The other insulins have a concentrations of 600 nmol/mL (according to Heise 6 nmol/L). The point is 1 unit of insulin detemir has 4 times the molecules as the other insulins to produce the exact same glucose lowering effect.
HEISE 2004: According to the authors, potentially how much less hypoglycemia would you expect with insulin detemir vs glargine? NPH?
An estimate hyper- and hypoglycemia can be derived from the prediction intervals: on oncedaily an unusually pronounced maximum effect (potentially hypoglycemia) will occur about: every 2 yrs with detemir, 24 times a year with NPH, and 10 times a year with glargine
TRANSITION/HOLLANDER 2011: POPULATION, AIM OF STUDY, AND PRODUCTS STUDIED
T2D; INSULIN AND DPP-4 INHIBITOR NAIVE; once-daily Det + SITA + MET versus SITA + MET ± SU
TRANSITION/HOLLANDER 2011: What was the target for detemir titration: 56-93, 70-110, or 72-108 mg/dL? How often was detemir titrated?
Insulin detemir was titrated weekly to a prebreakfast FPG target 72-108 mg/dL PG measurement
TRANSITION/HOLLANDER 2011: What was the decrease in A1c between detemir and SU groups: 1.1 and 0.5, 1.3 and 0.9, or 1.44 and 0.89%?
Mean A1C decreased by 1.44% with Det + SITA + MET vs 0.89% decrease with SITA + MET ± SU (P value less than 0.001 comparison between groups)
TRANSITION/HOLLANDER 2011: Which had significantly more severe hypoglycemia? Overall hypoglycemia?
No significant difference in either surprisingly.
TRANSITION/HOLLANDER 2011: Which group gained more weight, detemir or SU?
Neither. They both lost a small amount of weight without signficant difference.
KLEIN 2007: POPULATION, AIM OF STUDY, AND PRODUCTS STUDIED
T2D; CLAMP STUDY; PD (PARTICULARLY DURATION OF ACTION)
KLEIN 2007: How was Klein different in design from Heise by population and study design?
T2D; Crossover where each patient received each drug; Heise was T1DM, not crossed over, and each patient received the same drug on 4 different days
KLEIN 2007: About how many patients were in the study compared to Heise: half, same, or twice as many?
Half. Only 27 men. Heise had 54 randomized (32 males, 22 females) but only 51 completers.
KLEIN 2007: Author’s conclusions with the PD parameter GIR between glargine and detemir?
About the same in T2D. Detemir seems to be as well suited as glargine for once daily administration in T2D.
KLEIN 2007: What did Klein study demonstrate about the properties of all marketed long acting insulins?
Dose dependancy…the larger the dose, the longer the duration, the higher the peak.
KLEIN 2007: Compared to the Heise clamp study in T1D, what were the doses of glargine and detemir? What was the clamped glucose level: (80, 90, or 100mg/dL) compared to Heise at 100mg/dL?
Heise 0.4units/kg. Klein 0.4, 0.8, and 1.4units/kg. Heise clamp was 100mg/dL. Klein subjects were clamped at 90mg/dL.
KLEIN 2007: What were the patients randomized to? How many clamps did each patient receive after randomization?
Randomized to either detemir or glargine group. 6 clamps each. Each group received experimental drug NN344 at 3 different doses and either glargine or detemir at 0.4, 0.8, and 1.4 units/kg.
KLEIN 2007: When were the peaks of all the insulins used in the study: 6-8, 9-11, 10-12, or 11-13 hours?
9-11 hours after injection
KLEIN 2007: When was “end of duration” defined, BG rise above: 100, 126, 150, or 200mg/dL? What was it in Heise 2004?
Klein greater than 126mg/dL; Heise greater than 200mg/dL
KLEIN 2007: T or F: The population studied in Klein were men and woman with T2D were insulin naive.
False. 27 insulin treated men with T2D already on insulin (not naive).
KLEIN 2007: Within subject variability was ____ (47, 57 , or 67%) for detemir and ___ (57, 153, or 215%) with glargine.
Within subject variability was 57% for detemir and 215% with glargine.
KLEIN 2007: How was the within subject variability with detemir compared to glargine: similar, better, or worse?
Better.
MENEGHINI 2013 (1768): POPULATION, AIM OF STUDY, AND PRODUCTS STUDIED
T2D; QD DETEMIR VS GLARGINE; ADD-ON TO MET
MENEGHINI 2013 (1768): When were doses of basal given?
Anytime in the evening from 1 hour before the last main meal until bedtime, with a starting dose of 10 U
MENEGHINI 2013 (1768): Were metformin doses allowed to be changed?
No
MENEGHINI 2013 (1768): Did detemir meet non-inferiority with glargine for once daily dosing? Does that make detemir inferior?
No. The estimated between-treatment difference (detemir–glargine) was 0.30% (95% CI: 0.14–0.46%) in the full analysis set and 0.35% (95% CI: 0.19–0.51%) in the per protocol analysis set. COMMENT: It was within the 0.4% difference in the mean, but since the margin of 95% CI values exceeded 0.4%, non-inferiority for detemir could not be confirmed. Technically, the study met the CONSORT criteria G which is inconclusive. Glargine had a statistically better A1c drop but still possible the drugs are non-inferior just not with this study data.
MENEGHINI 2013 (1768): What two significant positives for detemir came from the study?
Overall hypoglycemia stat sign lower for detemir (although both were low and no stat sign with nocturnal) and weight (mean body weight decreased by 1.1 lb with insulin detemir and increased by 2.2 lb with insulin glargine). PERSONALLY some of the weight and hypoglycemia advantages could be attributed to less efficacy in the study. Comparisons could really only be made if A1c drops were similar.
MENEGHINI 2013 (1768): What was a potential reason for less A1c decrease for detemir?
- FPG were still decreasing with detemir, but stabilized after 12 weeks in glargine group. This ‘lag’ in correction of FPG may have contributed to the difference in HbA1c observed between the two groups at 26 weeks. 2. Glycaemic excursions were lower during the day with glargine than with detemir, also contributing to the difference in HbA1c.
MENEGHINI 2013 (1768): How could the A1c decreases been more optimized in the study?
a titration algorithm prescribing more frequent insulin dose adjustments, such as was done in several patient self-adjustment studies, and supported by ADA/EASD guidelines, might have achieved greater HbA1c improvement. This study only titrated once a week.
NOVEL 2/HOLLANDER 2008; POPULATION, AIM OF STUDY, AND PRODUCTS STUDIED. What was another name for this study?
T2D; BASAL BOLUS; DETEMIR (QD OR BID) VS GLARGINE (QD); NOVEL 2.
NOVEL 2/HOLLANDER 2008: Which OAD was not allowed?
SU and alpha glucosidase inhibitors (Precose/acarbose and Glyset/miglitol)
NOVEL 2/HOLLANDER 2008: Both detemir and glargine were started in the evening as oncedaily dosing. What was decision point to go from once to twice daily?
detemir patients were to be transferred to twice daily dosing if their pre-breakfast blood glucose was less than 108 mg/dL and pre-dinner was greater than 108 mg/dL
NOVEL 2/HOLLANDER 2008: What was the the mealtime insulin and how was it titrated?
All patients received aspart at mealtimes and titrated to achieve a 2-hour postprandial target of less than 162 mg/dL. MY OPINION This almost guarantees detemir (or any basal) to go BID given the pre-dinner goal trigger for moving to BID was 108mg/dL and the post prandial goal (i.e., after lunch) was 162 mg/dL. Basal insulin shouldn’t be expected to lower blood sugar any further (should maintain BG).