Table 3 shows the median UIC by population group and
survey stratum. The national median UIC is indicative of
excessive intake at the population level, exceeding the threshold
concentration of 300mg/L in both population groups. Comparing
results by zone showed that the NWZ had more than
adequate intake, whereas the NEZ and SCZ had UICs indicative
of excessive iodine intakes. In women of reproductive age, the
UIC in the NEZ was significantly higher than in the NWZ or
SCZ (Mann-Whitney; P < 0.001 and P = 0.045, respectively).