Table 2. Total D and I in normal urine (micrograms per gram of creatinine).

Subjects (sex, age)	D	I
1 (M, 78)	6.17 ± 0.32	4.67 ± 0.19
2 (M, 70)	5.16 ± 0.15	4.10 ± 0.02
3 (M, 50)	5.17 ± 0.13	3.96 ± 0.01
4 (F, 53)	11.28 ± 0.21	9.96 ± 0.56
5 (M, 32)	12.74 ± 0.83	11.44 ± 0.58
6 (F, 28)	5.67 ± 0.62	4.08 ± 0.34
7 (M, 28)	14.60 ± 1.75	5.77 ± 0.33

M, male; F, female.