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Risk of hypoglycaemia in types 1 and 2 diabetes: Effects of treatment modalities and their duration

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UK Hypoglycaemia Study Group·2007·Diabetologia

Abstract

Aims/hypothesis We explored the epidemiology of hypoglycaemia in individuals with insulin-treated diabetes by testing the hypothesis that diabetes type and duration of insulin treatment influence the risk of hypoglycaemia.Materials and methods This was an observational study over 9-12 months in six UK secondary care diabetes centres. Altogether 383 patients were involved. Patients were divided into the following three treatment groups for type 2 diabetes: (1) sulfonylureas, (2) insulin for <2 years and (3) insulin for >5 years, and into two treatment groups for type 1 diabetes, namely <5 years disease duration and >15 years disease duration. Self-reported (mild and severe) and biochemical episodes (interstitial glucose <2.2 mmol/l using continuous glucose monitoring) were recorded.Results Mild hypoglycaemia in type 2 diabetic patients on insulin for <2 years was less frequent than in type 1 patients with <5 years disease duration (mean rate: 4 vs 36 episodes per subject-year, p < 0.001). In type 2 diabetic patients treated with sulfonylureas or insulin for <2 years, no differences were observed in the proportion experiencing severe hypoglycaemia (7 vs 7%, difference 0 [95% CI: -7 to 9%]), mild symptomatic (39 vs 51%, difference 12 [-3 to 25%]) or interstitial glucose <2.2 mol/l (22 vs 20%, difference 2 [-13 to 10%]). Severe hypoglycaemia rates were comparable in patients with type 2 diabetes on sulfonylureas or insulin < 2 years (0.1 and 0.2 episodes per subject-year) and far less frequent than in type 1 diabetes (<5 years group, 1.1; >15 years group, 3.2.episodes per subject-year).Conclusions/interpretation During early insulin use in type 2 diabetes, the frequency of hypoglycaemia is generally equivalent to that observed in patients treated with sulfonylureas and considerably lower than during the first 5 years of treatment in type 1 diabetes.

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Crossref · 10.1007/s00125-007-0599-y

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  • Iatrogenic hypoglycemia is more frequent in patients with profound endogenous insulin deficiency-type 1 diabetes and advanced type 2 diabetes.

    “Iatrogenic hypoglycemia is more frequent in patients with profound endogenous insulin deficiency—type 1 diabetes and advanced type 2 diabetes—and its incidence increases with the duration of diabetes (23).”

    From Hypoglycemia and Diabetes: A Report of a Workgroup of the American Diabetes Association and The Endocrine Society (2013) · cites this paper as [23]

    The Discussion (page unavailable) supports the main claim: hypoglycaemia risk rises as beta-cell function declines in type 2 diabetes, approaching the risk seen in type 1 diabetes. The cited sentence also says incidence increases with diabetes duration, but the paper links increased risk in type 2 diabetes to duration of insulin therapy and reports no increase in mild hypoglycaemia with type 1 diabetes duration. (LLM, conf=0.85)

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  • The incidence of iatrogenic hypoglycemia increases with the duration of diabetes.

    “Iatrogenic hypoglycemia is more frequent in patients with profound endogenous insulin deficiency—type 1 diabetes and advanced type 2 diabetes—and its incidence increases with the duration of diabetes (23).”

    From Hypoglycemia and Diabetes: A Report of a Workgroup of the American Diabetes Association and The Endocrine Society (2013) · cites this paper as [23]

    The Discussion reports that severe hypoglycaemia increases with longer type 1 diabetes duration, but says mild hypoglycaemia does not. For type 2 diabetes, it links rising risk to the duration of insulin therapy, not directly to the duration of diabetes. The unqualified claim therefore overstates the findings. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • Severe hypoglycemia in patients with type 2 diabetes occurs at rates of 35 to 70 per 100 patient-years.

    “Severe hypoglycemia in patients with type 2 diabetes has been shown to occur at rates of 35 (24) to 70 (23) per 100 patient-years.”

    From Hypoglycemia and Diabetes: A Report of a Workgroup of the American Diabetes Association and The Endocrine Society (2013) · cites this paper as [23]

    Table 2 (Discussion; page unavailable) reports 0.7 severe episodes per person-year—70 per 100 person-years—for patients with type 2 diabetes treated with insulin for more than five years. It does not report the claimed lower rate of 35 per 100; rates also vary by treatment and its duration, so the range is not supported as a general rate for type 2 diabetes. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Iatrogenic hypoglycemia occurs about two to three times more frequently in type 1 diabetes than in type 2 diabetes.

    “It is caused by treatment with a sulfonylurea, glinide, or insulin and occurs about two to three times more frequently in type 1 diabetes than in type 2 diabetes (23,24).”

    From Hypoglycemia and Diabetes: A Report of a Workgroup of the American Diabetes Association and The Endocrine Society (2013) · cites this paper as [23]

    The Self-reported episodes section (page not provided) reports more hypoglycaemia in some type 1 groups, but not a two- to threefold difference: mild episodes were 22 times more frequent in short-duration type 1 diabetes than in type 2 diabetes during early insulin use. The Discussion (page not provided) says rates in type 2 diabetes after more than five years of insulin use were similar to those in short-duration type 1 diabetes. The claimed ratio therefore does not hold across the treatment and duration groups studied. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Iatrogenic hypoglycemia is caused by treatment with a sulfonylurea, glinide, or insulin.

    “It is caused by treatment with a sulfonylurea, glinide, or insulin and occurs about two to three times more frequently in type 1 diabetes than in type 2 diabetes (23,24).”

    From Hypoglycemia and Diabetes: A Report of a Workgroup of the American Diabetes Association and The Endocrine Society (2013) · cites this paper as [23]

    The Introduction identifies hypoglycaemia as a side effect of insulin therapy, and the Discussion reports a risk of severe hypoglycaemia associated with sulfonylureas. The paper studies those two treatments but does not address glinides, so it does not support the full list of causes. Page numbers are unavailable in our copy. (LLM, conf=0.88)

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Authors
UK Hypoglycaemia Study Group
Corresponding author
UK Hypoglycaemia Study Group
Venue
Diabetologia
Published
2007-04-06
Volume
50
Issue
6
Pages
1140-1147
ISSN
  • 0012-186X (ISSN-L)
  • 1432-0428
OpenAlex
W4250647894
Cited by
825
References
26
Citations by year
2026: 5 · 2025: 13 · 2024: 28 · 2023: 36 · 2022: 35 · 2021: 49 · 2020: 46 · 2019: 50 · 2018: 67 · 2017: 64 · 2016: 61 · 2015: 80 · 2014: 71 · 2013: 71 · 2012: 49
FWCI
17.12
Type
journal article
Language
en
Open access
Locations
  • Diabetologia (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Management and Research
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
  • Health Sciences › Health Professions › Emergency Medical Services › Patient Safety and Medication Errors
Keywords
hypoglycemia, type 1 diabetes, type 2 diabetes, insulin-treated diabetes, sulfonylureas, disease duration, severe hypoglycemia, interstitial glucose, continuous glucose monitoring, hypoglycemia risk
MeSH terms
Analysis of Variance, Blood Glucose, Diabetes Mellitus, Type 1, Diabetes Mellitus, Type 2, Humans, Hypoglycemia, Hypoglycemic Agents, Insulin, Risk Factors, Blood Glucose Self-Monitoring, Incidence, Monitoring, Ambulatory

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