Table 2

Incidence of T1D in NHW youth <15 years of age at diagnosis by year and sex: the SEARCH for Diabetes in Youth Study, 2002–2009

20022003200420052006200720082009
n604598577624612659680668
Population (denominator)2,159,6772,131,6822,104,4252,086,1732,082,4342,074,9012,077,8052,081,993
Total
 Unadjusted28.0 (25.8–30.3)28.1 (25.9–30.4)27.4 (25.3–29.7)29.9 (27.6–32.3)29.4 (27.2–31.8)31.8 (29.4–34.3)32.7 (30.4–35.3)32.1 (29.8–34.6)
 Age-adjusted28.0 (27.4–28.5)28.1 (27.5–28.6)27.4 (26.9–28.0)29.9 (29.3–30.5)29.4 (28.9–30.0)31.8 (31.2–32.4)32.8 (32.2–33.4)32.2 (31.6–32.8)
 Sex-adjusted28.0 (27.4–28.5)28.1 (27.5–28.6)27.4 (26.9–27.9)29.9 (29.3–30.5)29.4 (28.8–30.0)31.8 (31.2–32.4)32.7 (32.1–33.4)32.1 (31.5–32.7)
 Age- and sex-adjusted28.0 (27.4–28.5)28.1 (27.5–28.6)27.4 (26.9–28.0)29.9 (29.3–30.5)29.4 (28.9–30.0)31.8 (31.2–32.4)32.8 (32.2–33.4)32.2 (31.6–32.8)
Females
 n280299288278279317319329
 Unadjusted26.7 (23.7–30.0)28.9 (25.8–32.3)28.1 (25.0–31.6)27.4 (24.3–30.8)27.5 (24.4–30.9)31.4 (28.1–35.0)31.5 (28.2–35.2)32.4 (29.1–36.1)
 Age-adjusted26.7 (25.9–27.4)28.9 (28.1–29.7)28.1 (27.3–28.9)27.4 (26.6–28.2)27.5 (26.7–28.3)31.4 (30.5–32.2)31.5 (30.7–32.4)32.5 (31.6–33.4)
Males
 n324299289346333342361339
 Unadjusted29.2 (26.2–32.6)27.3 (24.4–30.6)26.7 (23.8–30.0)32.3 (29.1–35.9)31.2 (28.0–34.8)32.1 (28.9–35.7)33.9 (30.6–37.6)31.8 (28.6–35.4)
 Age-adjusted29.2 (28.5–30.0)27.3 (26.5–28.0)26.7 (26–27.5)32.3 (31.5–33.1)31.2 (30.4–32.1)32.2 (31.4–33.0)34.0 (33.1–34.9)31.9 (31.1–32.7)
  • Data are incidence per 100,000 person-years (95% CI) unless otherwise indicated. All age- and sex-adjusted rates were calculated by using direct adjustment with the estimated 2002–2009 U.S. intercensal population as the standard population.