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Reporting of hypoglycaemia in clinical trials of basal insulins: A need for consensus.

ABSTRACT: Hypoglycaemia is a common side-effect of diabetes therapies, particularly insulin, and imposes a substantial burden on individuals and healthcare systems. Consequently, regulatory approval of newer basal insulin (BI) therapies has relied on demonstration of a balance between achievement of good glycaemic control and less hypoglycaemia. Randomized controlled trials (RCTs) are the gold standard for assessing efficacy and safety, including hypoglycaemia risk, of BIs and are invaluable for obtaining regulatory approval. However, their highly selected patient populations and their conditions lead to results that may not be representative of real-life situations. Real-world evidence (RWE) studies are more representative of clinical practice, but they also have limitations. As such, data both from RCTs and RWE studies provide a fuller picture of the hypoglycaemia risk with BI therapies. However, substantial differences exist in the way hypoglycaemia is reported across these studies, which confounds comparisons of hypoglycaemia frequency among different BIs. This problem is ongoing and persists in recent trials of second-generation BI analogues. Although they provide a lower risk of hypoglycaemia when compared with earlier BIs, they do not eliminate it. This review describes differences in the way hypoglycaemia is reported across RCTs and RWE studies of second-generation BI analogues and examines potential reasons for these differences. For studies of BIs, there is a need to standardize aspects of design, analysis and methods of reporting to better enable interpretation of the efficacy and safety of such insulins among studies; such aspects include length of follow-up, glycaemic targets, hypoglycaemia definitions and time intervals for determining nocturnal events.

SUBMITTER: Frier BM

PROVIDER: S-EPMC6767397 | biostudies-other | 2019 Jul

REPOSITORIES: biostudies-other

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Reporting of hypoglycaemia in clinical trials of basal insulins: A need for consensus.

Frier Brian M BM Ratzki-Leewing Alexandria A Harris Stewart B SB

Diabetes, obesity & metabolism 20190429 7

Hypoglycaemia is a common side-effect of diabetes therapies, particularly insulin, and imposes a substantial burden on individuals and healthcare systems. Consequently, regulatory approval of newer basal insulin (BI) therapies has relied on demonstration of a balance between achievement of good glycaemic control and less hypoglycaemia. Randomized controlled trials (RCTs) are the gold standard for assessing efficacy and safety, including hypoglycaemia risk, of BIs and are invaluable for obtaining ...[more]

PMID: 30924567

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Project description:AimThe comparative effectiveness of basal insulins has been examined in several studies. However, current treatment algorithms provide a list of options with no clear differentiation between different basal insulins as the optimal choice for initiation.MethodsA comprehensive search of MEDLINE, Embase, Cochrane Library, ISI, and Scopus, and a reference list of retrieved studies and reviews were performed up to November 2023. We identified phase III randomized controlled trials (RCTs) comparing the efficacy and safety of basal insulin regimens. The primary outcomes evaluated were HbA1c reduction, weight change, and hypoglycemic events. The revised Cochrane ROB-2 tool was used to assess the methodological quality of the included studies. A random-effects frequentist network meta-analysis was used to estimate the pooled weighted mean difference (WMD) and odds ratio (OR) with 95% confidence intervals considering the critical assumptions in the networks. The certainty of the evidence and confidence in the rankings was assessed using the GRADE minimally contextualized approach.ResultsOf 20,817 retrieved studies, 44 RCTs (23,699 participants) were eligible for inclusion in our network meta-analysis. We found no significant difference among various basal insulins (including Neutral Protamine Hagedorn (NPH), ILPS, insulin glargine, detemir, and degludec) in reducing HbA1c. Insulin glargine, 300 U/mL (IGlar-300) was significantly associated with less weight gain (mean difference ranged from 2.9 kg to 4.1 kg) compared to other basal insulins, namely thrice-weekly insulin degludec (IDeg-3TW), insulin degludec, 100 U/mL (IDeg-100), insulin degludec, 200 U/mL (IDeg-200), NPH, and insulin detemir (IDet), but with low to very low certainty regarding most comparisons. IDeg-100, IDeg-200, IDet, and IGlar-300 were associated with significantly lower odds of overall, nocturnal, and severe hypoglycemic events than NPH and insulin lispro protamine (ILPS) (moderate to high certainty evidence). NPH was associated with the highest odds of overall and nocturnal hypoglycemia compared to others. Network meta-analysis models were robust, and findings were consistent in sensitivity analyses.ConclusionThe efficacy of various basal insulin regimens is comparable. However, they have different safety profiles. IGlar-300 may be the best choice when weight gain is a concern. In contrast, IDeg-100, IDeg-200, IDet, and IGlar-300 may be preferred when hypoglycemia is the primary concern.

Project description:INTRODUCTION:The stable, ultra-long duration of action of insulin degludec (degludec) minimizes fluctuations in glucose-lowering activity over the daily (24-h) dosing period, and comparative studies with other basal insulins suggest that these properties translate into a lower risk of hypoglycemia at equivalent levels of glycemic control. Results from the real-world European multicenter, retrospective chart review study of 2550 patients with type 1 and type 2 diabetes (T1D and T2D) in routine clinical care EU-TREAT (NCT02662114) showed that patients benefited from improved glycemic control and significantly reduced rates of hypoglycemia following a switch to degludec. METHODS:In this post hoc analysis, EU-TREAT patients were stratified into good (≤ 7.5% HbA1c), intermediate (> 7.5 to ≤ 8.5% HbA1c), and poor (> 8.5% HbA1c) glycemic control at baseline to investigate the possibility of differential benefits, either improved control or reduced risk of hypoglycemia, whichever the need. Changes in HbA1c, overall hypoglycemia, and total insulin dose from baseline to 6 and 12 months follow-up were assessed for each group. RESULTS:For both T1D and T2D patients, those in good initial control experienced significant reductions in rates of hypoglycemia and total insulin dose following the switch, without compromising control. Those in poor initial control achieved significant improvements in HbA1c with no change in rates of hypoglycemia or total insulin dose. CONCLUSION:This analysis expands the findings of EU-TREAT by showing differential changes in the clinical endpoints depending on particular need. It introduces the possibility that the differential benefits of degludec could address two of the renowned clinical challenges faced when treating diabetes: improving glycemic control for optimal management of T1D and titrating insulin dose in T2D, both without fear of increased hypoglycemia. TRIAL REGISTRATION:ClinicalTrials.gov, NCT02662114. FUNDING:Novo Nordisk A/S.

Project description:BACKGROUND:Evidence-based health care is informed by results of randomized clinical trials (RCTs) and their syntheses in meta-analyses. When the trial outcomes measured are not clearly described in trial publications, knowledge synthesis, translation, and decision-making may be impeded. While heterogeneity in outcomes measured in adolescent major depressive disorder (MDD) RCTs has been described, the comprehensiveness of outcome reporting is unknown. This study aimed to assess the reporting of primary outcomes in RCTs evaluating treatments for adolescent MDD. METHODS:RCTs evaluating treatment interventions in adolescents with a diagnosis of MDD published between 2008 and 2017 specifying a single primary outcome were eligible for outcome reporting assessment. Outcome reporting assessment was done independently in duplicate using a comprehensive checklist of 58 reporting items. Primary outcome information provided in each RCT publication was scored as "fully reported", "partially reported", or "not reported" for each checklist item, as applicable. RESULTS:Eighteen of 42 identified articles were found to have a discernable single primary outcome and were included for outcome reporting assessment. Most trials (72%) did not fully report on over half of the 58 checklist items. Items describing masking of outcome assessors, timing and frequency of outcome assessment, and outcome analyses were fully reported in over 70% of trials. Items less frequently reported included outcome measurement instrument properties (ranging from 6 to 17%), justification of timing and frequency of outcome assessment (6%), and justification of criteria used for clinically significant differences (17%). The overall comprehensiveness of reporting appeared stable over time. CONCLUSIONS:Heterogeneous reporting exists in published adolescent MDD RCTs, with frequent omissions of key details about their primary outcomes. These omissions may impair interpretability, replicability, and synthesis of RCTs that inform clinical guidelines and decision-making in this field. Consensus on the minimal criteria for outcome reporting in adolescent MDD RCTs is needed.

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Reporting of hypoglycaemia in clinical trials of basal insulins: A need for consensus.

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Reporting of hypoglycaemia in clinical trials of basal insulins: A need for consensus.

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