Diabetes care
October 1, 2026 · via Europe PMC
Adult Complications of Childhood-Onset Type 1 Diabetes Vary With Age at Diagnosis: A Population-Based Study.
Nielsen TC, Lain SJ, Craig ME, +5 more, Nassar N.
AI summary — for doctors, generated from the abstract only
In a population-based study of over 5,000 people with childhood-onset type 1 diabetes, those diagnosed before age 7 had a lower risk of chronic complications in the first 20 years after diagnosis compared with those diagnosed later in childhood.
What was studied
A population-based registry study examined the incidence of long-term complications among 5,202 people with childhood-onset type 1 diabetes, specifically focusing on how age at diagnosis (including those diagnosed before age 7) related to complication risk over the following decades.
Key findings
- Of 5,202 people identified with childhood-onset type 1 diabetes, 1,694 (32.6%) were diagnosed before age 7.
- Children diagnosed before age 7 had a lower risk of developing chronic complications in the first 20 years after diagnosis compared with those diagnosed at older ages.
- Specific numeric complication rates and hazard ratios comparing age groups were not fully legible in the available abstract text.
- The authors concluded this supports a slower time course for developing complications with prepubertal (earlier) disease onset.
Clinical relevance
The findings suggest that age at type 1 diabetes diagnosis in childhood may meaningfully affect the pace of long-term complication development, which could be relevant to counseling patients and families diagnosed at different ages about expected complication risk trajectories and the importance of early, sustained glycemic management regardless of age at onset.
Who should care
Limitations
Most of the specific quantitative results (exact complication rates and statistical comparisons between age groups) were not fully legible in the available abstract text, limiting the ability to report detailed effect sizes here; registry-based design may be subject to incomplete capture of all complications.
Children diagnosed with type 1 diabetes before age 7 appeared to develop chronic complications more slowly over the following 20 years than those diagnosed later in childhood.
This is an AI-generated summary of the published abstract, not a clinical recommendation. It may not reflect the full text or subsequent updates — verify against the original source before acting on it.
Abstract
Objective
To examine incidence of long-term complications among people with childhood-onset type 1 diabetes, focusing on age at diabetes onset.
Research design and methods
A registry of children diagnosed with type 1 diabetes aged <16 years in New South Wales, Australia, between 1990 and 2009 linked to hospital, emergency department, public insurance, and death data from 2001 to 2019 to identify complications. Age at onset was categorized as <7 years, 7 to <13 years, and 13 to <16 years. Incidence rates and hazard ratios (HR), with 95% CI, for the risk of complications, were calculated from multivariable Cox regression models by 1) duration of diabetes 0 to <20 years and 2) attained age of 16-34 years, with HR adjusted for diagnosis year, sociodemographics, and acute diabetes complications.
Results
Of 5,202 people identified, 1,694 (32.6%) were diagnosed at age <7 years, 2,538 (48.8%) age 7 to <13 years, and 970 (18.6%) age 13 to <16 years. Within 20 years of onset, incidence ranged from 9.2 per 10,000 person-years (95% CI 7.2, 11.7) for cardiac complications to 53.4 per 10,000 person-years (95% CI 48.2, 59.0) for kidney complications. Diabetes onset at age <7 years (vs. 13 to <16 years) was associated with lower 20-year risk of complications, except lower-limb infections; cardiac adjusted HR (aHR) was 0.32 (95% CI 0.15, 0.66), severe retinopathy aHR was 0.25 (0.17, 0.36), lower-limb vascular complications aHR was 0.41 (0.24, 0.69), peripheral neuropathy aHR was 0.16 (0.08, 0.32), and kidney complications aHR was 0.40 (0.30, 0.53). Risk of complications did not differ by attained age.
Conclusions
Children with type 1 diabetes onset at age <7 years had lower chronic complication risk in the first 20 years postdiagnosis, supporting a slower time to develop complications with prepubertal onset.
DOI
10.2337/dc26-0964
PMID
42594337
Research metadata (titles, abstracts, authors, publication dates) is sourced from Europe PMC, which aggregates content from PubMed/MEDLINE, PubMed Central, and other providers under the U.S. National Library of Medicine (NLM/NCBI). NLM does not claim copyright on abstracts; the original journal publishers or authors may hold rights to the full articles. AI-generated summaries are derived only from the abstract, never the full text, and are always labeled as AI-generated.
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