Erythema measurements were performed 3 times in each test
site directly before the UV irradiation at time point zero (T 0 ), after
24 h (T 1 ) and after 48 h (T 2 ). All data were recorded in 2 separate
databases and compared with each other. The median of the
3 measurements after T 1 and T 2 was taken and averaged over the
40 subjects. The primary endpoint of the study was the difference
of erythema between the test substance at time points T 1 and T 2
and the value at time point T 0 in comparison to the untreated
area. Secondary endpoints were the comparison of the test substance
with the controls, and the skin tolerance on the nonirradiated
sites. Statistical analysis was performed by repeated-measures
ANOVA (SpSS software package, version 11.0). Due to a significant
variety of differences between the measurements T 1 and
T 2 and the basic value, univariate analysis with 1 = T 1 – T 0 and
2 = T 2 – T 0 was performed.