Fig. 3.

Adjusted OR with 95% CIs for maternal first-time diagnosis of hyper- or hypothyroidism during singleton pregnancy January 1, 1978 to December 31, 2006. Reference is singleton pregnancies in which the mother was born in Denmark (maternal origin) and singleton pregnancies in which the mother was living in East Denmark (maternal residence) at the time of the child's birth. Model included the following variables obtained at the time of the child's birth: maternal origin (born in Denmark/not born in Denmark), maternal residence (West Denmark/East Denmark), maternal age (<20, 20-24, 25-29, 30-34, 35-39, ≥40 years), calendar year (<1980, 1980-1982, 1983-1985, 1986-1988, 1989-1991, 1992-1994, 1995-1997, 1998-2000, 2001-2003, 2004-2006), parity including index pregnancy (1, 2, 3, ≥4), maternal cohabitation (married/not married) and maternal income (1st, 2nd, 3rd, 4th quartile).