Table 2.

Median and Ranges of 24-Hour and Spot Urinary Iodide Samples After Use of Iodinated Contrast Agents

	Baseline	First week	First month	Second month	Third month
24U [median (range)]	21.8 (7.6–58)	800 (112–1000)	19 (7.4–49.5)	17.5 (7.8–51)	19.2 (7.0–50)
sU [median (range)]	26 (6.9–40.5)	800 (61–1000)	20 (5.7–35)	21.7 (13.5–56.5)	21 (10–44)
ρ† (p value)	0.70 (p: 0.0005)	0.50 (p: 0.01)	0.73 (p: 0.0003)	0.74 (p: 0.0003)	0.42 (p: 0.03)

24U and sU values are in μg/dL. ρ† (Spearman's rho) represents the correlation coefficient between 24U and sU results.

24U, 24-hour urinary iodide sample; sU, spot urinary iodide sample.