Is the urinary iodine/creatinine ratio applicable to assess short term individual iodine status in Chinese adults? Comparison of iodine estimates from 24-h urine and timed-spot urine samples in different periods of the day

Table 3 Correlation between the measured and estimated urinary iodine excretion in different periods of the day

	Measured 24 h UIE VS estimated 24 h UIE¹	Measured 24 h UIE VS estimated 24 h UIE²	Measured 24 h UIE VS estimated 24 h UIE³	Measured 24 h UIE VS estimated 24 h UIE⁴	Measured 24 h UIE VS estimated 24 h UIE⁵	Measured 24 h UIE VS estimated 24 h UIE⁶
Morning	< 0.001^##	< 0.001^##	< 0.001^##	< 0.001^##	< 0.001^##	< 0.001^##
Afternoon	< 0.001^##	< 0.001^##	< 0.001^##	< 0.001^##	< 0.001^##	0.001^#
Evening	< 0.001^##	< 0.001^##	< 0.001^##	< 0.001^##	< 0.001^##	< 0.001^##
Early morning	< 0.001^##	< 0.001^##	< 0.001^##	< 0.001^##	< 0.001^##	0.002^#
Fasting time	< 0.001^##	< 0.001^##	< 0.001^##	< 0.001^##	< 0.001^##	< 0.001^##

UIE, urine iodine excretion;
^#Estimated urinary iodine excretion was significantly different compared to measured urinary iodine excretion (P < 0.01) by Spearman rank correlation analysis;
^##Estimated urinary iodine excretion was significantly different compared to measured urinary iodine excretion (P < 0.001) by Spearman rank correlation analysis

ISSN: 1743-7075