The mean age of the 976 adults (men 38.6% and women 61.4%)
was 46.1 13.9 years (23e73 years). The overall mean urinary
iodine concentration was 125 93 mg/L (median ¼ 110 mg/L). Milk
was consumed at least twice a day by 31.4%, once a day by 15.3%,
less than once a day by 19.6%, and never by 33.7%. The urinary
iodine concentrationwas significantly greater in those persons who
consumed milk more than once a day (P ¼ 0.040). The significant
difference remained after adjusting the ANOVA model for age, sex
and intake of iodized salt (Fig. 3B).