A Longitudinal Study of Changes in Thyroid Related Hormones among Pregnant Women Residing in an Iodine Deficient Urban Area

Table 1

Characteristics of pregnant and control women*.

Group	Number	Age (year)	Parity	Number (%) of women taking iodized salt
Pregnant	254	24.2 ± 4.9^a	3.5 ± 2.3^a	87 (34.2)^a
Nonpregnant	110	26.7 ± 4.8^a	3.7 ± 2.3^a	31 (28.2)^a

∗Similar superscript letters indicate statistically nonsignificant difference in the mean values of the two groups.