Table 1

Age- and sex-specific IRs per 100,000 PY of type 1 diabetes in Finnish children younger than age 15 from 2003 to 2018 and IRRs assessed by using the 2003–2006 period as a reference

Age-group (years)Calendar timeAllMaleFemale
IR/100,000 PY (95% CI)IRR (95% CI)PIR/100,000 PY (95% CI)IRR (95% CI)PIR/100,000 PY (95% CI)IRR (95% CI)P
0–142003–200657.9 (55.4–60.4)163.5 (59.9–67.2)152.0 (48.7–55.5)1
2007–201056.0 (53.6–58.6)0.97 (0.91–1.03)0.30461.2 (57.6–64.9)0.96 (0.89–1.05)0.38050.7 (47.4–54.1)0.97 (0.89–1.07)0.573
2011–201453.4 (51.1–55.9)0.92 (0.87–0.98)0.01258.8 (55.3–62.4)0.93 (0.85–1.01)0.06947.9 (44.7–51.2)0.92 (0.84–1.01)0.080
2015–201852.2 (49.8–54.6)0.90 (0.85–0.96)0.00157.7 (54.3–61.3)0.91 (0.84–0.99)0.02546.3 (43.2–49.7)0.89 (0.81–0.98)0.016
<52003–200651.1 (47.1–55.5)153.7 (47.9–60.0)148.5 (42.9–54.6)1
2007–201050.4 (46.5–54.6)0.99 (0.88–1.1)0.80353.3 (47.6–59.4)0.99 (0.85–1.16)0.92447.4 (42.0–53.3)0.98 (0.83–1.16)0.793
2011–201443.1 (39.4–46.9)0.84 (0.75–0.95)0.00444.6 (39.5–50.2)0.83 (0.71–0.98)0.02541.4 (36.4–46.9)0.85 (0.72–1.02)0.074
2015–201839.3 (35.7–43.1)0.77 (0.68–0.87)<0.00139.0 (34.1–44.4)0.73 (0.61–0.86)<0.00139.6 (34.5–45.2)0.82 (0.68–0.98)0.026
5–92003–200668.2 (63.6–73.1)172.7 (66.1–79.8)163.6 (57.2–70.4)1
2007–201062.3 (57.9–67.1)0.91 (0.83–1.01)0.07864.4 (58.1–71.2)0.89 (0.77–1.02)0.08460.2 (53.9–66.9)0.95 (0.82–1.10)0.466
2011–201459.4 (55.1–63.9)0.87 (0.79–0.96)0.00764.7 (58.5–71.4)0.89 (0.78–1.02)0.09253.9 (48.1–60.2)0.85 (0.73–0.99)0.031
2015–201858.6 (54.4–63.0)0.86 (0.78–0.95)0.00265.1 (58.9–71.7)0.89 (0.78–1.02)0.10651.8 (46.2–57.9)0.82 (0.70–0.95)0.008
10–142003–200654.3 (50.4–58.5)163.6 (57.7–69.9)144.7 (39.7–50.2)1
2007–201055.6 (51.5–59.9)1.02 (0.92–1.14)0.67265.8 (59.6–72.5)1.03 (0.9–1.18)0.62545.0 (39.8–50.7)1.01 (0.85–1.19)0.944
2011–201458.1 (53.8–62.7)1.07 (0.96–1.19)0.21067.4 (61.0–74.3)1.06 (0.92–1.21)0.40648.4 (42.9–54.5)1.08 (0.92–1.28)0.344
2015–201857.6 (53.4–62.1)1.06 (0.96–1.18)0.27067.7 (61.4–74.6)1.07 (0.93–1.22)0.36047.1 (41.7–53.0)1.05 (0.89–1.24)0.542