TABLE 1

Number of concordant and discordant twin pairs and crude concordance rates for type 1 diabetes in Finnish Young Twin Cohort

ZygosityConcordant pairsDiscordant pairsConcordance rate (%)
n
ProbandwisePairwise
Sex
 MaleMZ71942.427.033
DZ2477.84.151
 FemaleMZ51343.527.823
DZ1434.42.345
Opposite sexDZ4868.54.494
Age at onset in index twin ≤10 yearsMZ7766.750.021
DZ67613.67.388
Age at onset in index twin >10 yearsMZ52528.616.735
DZ11002.01.0102
Total*MZ123242.9 (26.7–59.2)27.3 (22.9–31.8)56
DZ71767.4 (2.2–12.6)3.8 (2.7–4.9)190
  • Data are n unless otherwise indicated.

  • *

    * Plus one discordant pair with unknown zygosity.