quantity of 40 pl of product was applied to each skin site in a randomized design, with
one skin site serving as an untreated control.
MEASUREMENT SETTINGS
All measurements were conducted in controlled temperature and humidity conditions
(22 + 2øC and 45 _+ 5% relative humidity). Subjects acclimated to the room conditions
during a 20-minute equilibration period prior to each set of measurements. The data
were collected at baseline, one hour and two hours after application of the products.
STATISTICAL ANALYSIS
Statistical analysis was performed with SAS for Windows © 6.12 package. PROC GLM,
PROC CORR, and PROC REG were the main procedures used to analyze the data and
select suitable models. Options for multiple comparison of means of different groups
were used.
RESULTS AND DISCUSSION
The results are given with the respective means, standard deviations, and significance
levels in Table II (a-c) and are illustrated in Figure 1. PROC GLM procedures were used
to compare the means of the different measurement modes (baseline, one-hour, and
two-hour), salt levels, and glycerin levels.
In general, there was very good agreement among the three instruments, with some
differences. A small but statistically significant difference (P < 0.05) was observed
between baseline measurements on the untreated site and those at the one-hour and
two-hour time points with the Nova © and the Skicon ©, but not with the Corneometer