Figure 1.

(A) T1D IR Directly Standardized in years 2010–2018 in all age groups (0–18 y.o.) A incidence rate directly standardized is the number of new cases occurring in a specified population during a year, expressed as the number of cases per 100,000 population of Podlaskie Voivedeship aged 0–18 yrs, standardized to the age-matched population of Poland from 2010. Slope = 0.948, P = 0.057. (B) T1D incidence rate (IR) in years 2010–2018 in certain age groups. A crude incidence rate is the number of new cases occuring, in a specified population during a year, expressed as the number of cases per 100,000 population of Podlaskie. Voivodeship in these age groups.

0–4 y.o. slope = 0.561, p = 0.566.

5–9 y.o slope = 1.78, p = 0.095.

10–14 y.o slope = 1.82, p = 0.127.

15–18 y.o slope = 1.78, p = 0.521.