Table 1.

Amounts of urinary thymine dimer (T = T) after UV irradiation in a solarium and the rates for its excretion

Volunteer	Sex	Dose (J/m²)	Amount of T = T*, (nmol)	Amount of T = T (pmol per m² body surface area per J/m²)	50% excretion time^† (hours)
1	F	383	3.6	5.8	69
2	F	256	3.3	9.0	62
3	F	124	1.9	9.3	70
4	F	256	3.4	7.4	65
5	F	383	2.4	3.6	70
6	F	383	2.9	4.6	55
7	M	383	5.5	7.2	75
8	M	192	2.9	6.6	71
9	F	383	2.0	3.5	64
10	M	383	1.6	2.0	76

↵* Total amount of T = T for 5 days assuming an average excretion of 160 μmol creatinine per kg body weight per day for women and 200 μmol for men (10).
↵† The 50% excretion time was calculated from the excretion rate during the first 5 days following UV irradiation.