Severe hypoglycemia risk with long-acting insulin analogs vs neutral protamine Hagedorn insulin
Open accessAbstract
Importance: Previous studies have found that the risk of severe hypoglycemia does not differ between long-acting insulin analogs and neutral protamine Hagedorn (NPH) insulin in patients with type 2 diabetes. However, these studies did not focus on patients 65 years or older, who are at an increased risk for hypoglycemia, or did not include patients with concomitant prandial insulin use. Objective: To examine the risk of emergency department (ED) visits or hospitalizations for hypoglycemia among older community-residing patients with type 2 diabetes who initiated long-acting insulin or NPH insulin in real-world settings. Design, Setting, and Participants: This retrospective, new-user cohort study assessed Medicare beneficiaries 65 years or older who initiated insulin glargine (n = 407 018), insulin detemir (n = 141 588), or NPH insulin (n = 26 402) from January 1, 2007, to July 31, 2019. Exposures: Insulin glargine, insulin detemir, and NPH insulin. Main Outcomes and Measures: The primary outcome was time to first ED visit or hospitalization for hypoglycemia, defined using a modified validated algorithm. Propensity score-weighted Cox proportional hazards regression was used to estimate hazard ratios (HRs) and 95% CIs. The risk of recurring hypoglycemia events was estimated using the Andersen-Gill model. Post hoc analyses were conducted investigating possible effect modification by age. Results: Of the 575 008 patients initiating use of insulin (mean [SD] age 74.9 [6.7] years; 53% female), 407 018 used glargine, 141 588 used detemir, and 26 402 used NPH insulin. The study included 7347 ED visits or hospitalizations for hypoglycemia (5194 for glargine, 1693 for detemir, and 460 for NPH insulin, with a median follow-up across the 3 cohorts of 0.37 years (interquartile range, 0.20-0.76 years). Initiation of glargine and detemir use was associated with a reduced risk of hypoglycemia compared with NPH insulin use (HR for glargine vs NPH insulin, 0.71; 95% CI, 0.63-0.80; HR, detemir vs NPH insulin, 0.72; 95% CI, 0.63-0.82). The HRs were similar for the recurrent event analysis. The protective association of long-acting insulin analogs varied by age and was not seen with concomitant prandial insulin use. Conclusions and Relevance: In this cohort study, initiation of long-acting analogs was associated with a lower risk of ED visits or hospitalizations for hypoglycemia compared with NPH insulin in older patients with type 2 diabetes in Medicare. However, this association was not seen with concomitant prandial insulin use.
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Once-daily basal insulin injection therapy is associated with minimal side effects and may be a reasonable option in many older adults.
“Once-daily basal insulin injection therapy is associated with minimal side effects and may be a reasonable option in many older adults (119).”
From 13. Older Adults: <i>Standards of Care in Diabetes—2024</i> (2024) · cites this paper as [119]
The Results and Discussion report a lower risk of severe hypoglycemia with long-acting insulin analogs than with NPH insulin in older adults with type 2 diabetes, although the association was not seen with concomitant prandial insulin. The paper does not establish that once-daily basal injections have minimal side effects overall or recommend them as a reasonable option for many older adults. (LLM, conf=0.85)
Experimental — accuracy not yet measuredOnce-daily basal insulin injection therapy is associated with minimal side effects and may be a reasonable option in many older adults.
“Once-daily basal insulin injection therapy is associated with minimal side effects and may be a reasonable option in many older adults (134).”
From 13. Older Adults: Standards of Care in Diabetes—2025 (2025) · cites this paper as [134]
The Results report that, among Medicare patients aged 65 or older with type 2 diabetes, long-acting insulin analogs were associated with fewer emergency visits or hospitalizations for hypoglycemia than NPH insulin. The paper does not establish that once-daily basal insulin has minimal side effects overall or recommend it as a reasonable option for many older adults; it also notes that the lower hypoglycemia risk was not seen with concomitant prandial insulin. (LLM, conf=0.84)
Experimental — accuracy not yet measuredLong-acting insulin analogs have been associated with a lower risk of emergency department visits and hospitalizations for hypoglycemia than NPH insulin in the Medicare population.
“long-acting insulin analogs have been associated with a lower risk of emergency department visits and hospitalizations for hypoglycemia than NPH insulin in the Medicare population”
From 13. Older Adults: Standards of Care in Diabetes—2026 (2026) · cites this paper as [148]
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- Authors
- Bradley, M. C., Chillarige, Y., Lee, H., Wu, X., Parulekar, S., Muthuri, S., Wernecke, M., MaCurdy, T. E., Kelman, J. A., & Graham, D. J.
- Affiliations
- United States Food and Drug Administration (US)
- Acumen (United States) (US)
- Centers for Medicare and Medicaid Services (US)
- Corresponding author
- Bradley, Marie C.
- ORCID
- Venue
- JAMA Internal Medicine
- Publisher
- American Medical Association (AMA)
- Published
- 2021-05-01
- Volume
- 181
- Issue
- 5
- Pages
- 598
- ISSN
- 2168-6106 (ISSN-L)
- PMC
- PMC7922234
- OpenAlex
- W3133553555
- Cited by
- 45
- References
- 2
- Citations by year
- 2026: 3 · 2025: 9 · 2024: 9 · 2023: 10 · 2022: 8 · 2021: 6
- FWCI
- 6.16
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- JAMA Internal Medicine (publishedVersion)
- PubMed Central (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
- long-acting insulin analogues, insulin glargine, insulin detemir, neutral protamine Hagedorn insulin, type 2 diabetes, older adults, emergency department visits, hospitalization, prandial insulin, insulin initiation, real-world evidence, Medicare beneficiaries, glycemic control
- MeSH terms
- Aged, Aged, 80 and over, Diabetes Mellitus, Type 1, Diabetes Mellitus, Type 2, Female, Humans, Hypoglycemia, Insulin, Isophane, Male, Retrospective Studies, Cohort Studies, Proportional Hazards Models, Insulin, Long-Acting
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