Incidence of Type 1 Diabetes among Children and Adolescents in Italy between 2009 and 2013: The Role of a Regional Childhood Diabetes Registry

Table 2

Incidence Rate Ratio (IRR) with 95% CI of T1DM among subjects <18 years, by sex, year, and group of age. Apulia, Italy, 2009–2013.

	IRR			95% CI
Sex
Female	Ref.
Male	1.06	0.88	0.381	0.93–1.21
Year
2009	Ref.
2010	0.75		0.001	0.62–0.89
2011	0.66		0.000	0.54–0.79
2012	0.45		0.000	0.36–0.56
2013	0.55		0.000	0.45–0.67
Age group
<1 year	Ref.
1–4 years	2.11	2.91	0.004	1.28–3.48
5–9 years	3.12	4.56	0.000	1.91–5.08
10–14 years	2.98	4.37	0.000	1.83–4.85
15–17 years	2.46	3.52	0.000	1.49–4.05