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J Clin Res Pediatr Endocrinol. 2018 Jun 1;10(2):92-99. doi: 10.4274/jcrpe.5456. Epub 2017 Oct 30.

Time Trends, Regional Variability and Seasonality Regarding the Incidence of Type 1 Diabetes Mellitus in Romanian Children Aged 0-14 Years, Between 1996 and 2015

Author information

1
Victor Babes University of Medicine and Pharmacy, Department of Diabetes and Metabolic Diseases, Timisoara, Romania
2
Cristian Serban Medical Center of Evaluation and Rehabilitation for Children and Adolescents, Buzias, Romania
3
University of Southern Denmark, Odense University Hospital, Department of Clinical Research, Odense Patient Data Exploratory Network (OPEN), Odense, Denmark
4
Victor Babes University of Medicine and Pharmacy, Department of Endocrinology, Timisoara, Romania
5
Victor Babes University of Medicine and Pharmacy, Department of Biostatistics and Medical Informatics, Timisoara, Romania

Abstract

OBJECTIVE:

The incidence of type 1 diabetes mellitus in children is highly variable in the world. The aim of our study was to: 1) analyze the evolution of the incidence of childhood type 1 diabetes in Romania between 1996 and 2015, and: 2) to search for differences amongst age groups, gender, geographic regions and month of diagnosis.

METHODS:

Data on all new cases of type 1 diabetes, aged <15 years, obtained from two independent sources, were included in the study. The statistical methods included modeling of the incidence rates, adjusting for age, sex, calendar year, geographic region and seasonality.

RESULTS:

The study group was composed of 5422 children, with overall completeness of ascertainment estimated at 93.7%. The incidence rate (per 100.000 person-years) rose continuously, from 4.7 [95% confidence interval (CI) 3.9-5.7] in 1996 to 11.0 (95% CI 9.9-12.2) in 2015, by a yearly rate of 5.1%, highest in the youngest and lowest in the oldest children. The mean incidence was significantly higher (p<0.0001) in Transylvania (7.9, 95% CI 7.6-8.3) than in Moldavia (6.5, 95% CI 6.2-6.9) and Muntenia (7.0, 95% CI 6.7-7.3), probably due to differences regarding ethnicity and lifestyle. The monthly incidence showed a sinusoidal pattern, peaking in January and being minimum in June.

CONCLUSION:

The incidence of type 1 diabetes mellitus in Romanian children increased continuously during the study period by a rate that, if maintained, would lead to its doubling every 14 years. Important differences were established between geographic regions and seasonality at diagnosis.

KEYWORDS:

Type 1 diabetes mellitus; Romania; children; incidence; seasonality

PMID:
29082895
PMCID:
PMC5985393
DOI:
10.4274/jcrpe.5456
[Indexed for MEDLINE]
Free PMC Article

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