Table 1.

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

VolunteerSexDose (J/m2)Amount of T = T*, (nmol)Amount of T = T (pmol per m2 body surface area per J/m2)50% excretion time (hours)
1F3833.65.869
2F2563.39.062
3F1241.99.370
4F2563.47.465
5F3832.43.670
6F3832.94.655
7M3835.57.275
8M1922.96.671
9F3832.03.564
10M3831.62.076
  • * 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.