Correction

Ghassabian A, Steenweg-de Graaff J, Peeters RP, et al. Maternal urinary iodine concentration in pregnancy and children's cognition: results from a population-based birth cohort in an iodine-sufficient area. BMJ Open 2014;4:e005520. doi:10.1136/bmjopen-2014- 005520

The column headers in Table 1 are the wrong way round; ‘<150 µg/g’ should be ‘>150 µg/g’ and vice versa. Please see the corrected Table 1 below:

Table 1

Baseline characteristics (n=1525)

 UIC adjusted for creatinine levels>150 μg/g<150 μg/gp ValueMaternal characteristics Age at enrolment, years30.8 (4.6)28.6 (5.3)<0.001 Body mass index at enrolment24.4 (4.3)25.3 (5.1)0.01 Education, %  Primary18.227.50.01  Secondary54.352.2  Higher education27.520.3 Psychopathology score in pregnancy

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