Table 5.

Correlation analysis between dietary iodine intake and selected human indices and UIC and iodine knowledge in pregnant and lactating women^†

	Pregnant women (n 1181)		Lactating women (n 504)
Variables	r	P-value	r	P-value
Age (years)	0·160	< 0·001**	0·120	0·007*
Weight (kg)	0·056	0·053	–0·139	0·002*
Height (cm)	0·084	0·004*	0·044	0·321
BMI (kg/m2)‡	0·024	0·406	–0·156	< 0·001**
Gestational weeks	0·039	0·188	–	–
Number of births	0·081	0·005*	0·039	0·387
UIC (µg/l)§	0·064	0·028*	–0·102	0·022*
Iodine knowledge scores||	0·089	0·002*	0·002	0·961

^*Significant (P < 0·05).

^**Significant (P < 0·001).

^†Spearman correlation was used to analyse the relationships between dietary iodine intake and age, weight, height, BMI, gestational age in weeks, number of births, UIC and iodine knowledge scores.

^‡For pregnant women, BMI is calculated from pre-pregnancy weight.

^§ UIC, urinary iodine concentration (µg/l).

^|| Scores range from 0 to 23.