Table 1.
Repeated measures of one-way ANOVA for acne severity in groups A and B, before and after treatment, using the Global Acne Grading System (GAGS).
| GAGS | Group A | Group B | Effect | F(1, 22) | p | η2p | ||
|---|---|---|---|---|---|---|---|---|
| M | SD | M | SD | |||||
| G | 12.32 | 0.002 | 0.359 | |||||
| Before treatment | 16.42 | 1.00 | 16.50 | 1.00 | T | 430.26 | <0.001 | 0.951 |
| After treatment | 11.58 | 1.51 | 9.00 | 0.95 | T × G | 20.11 | <0.001 | 0.478 |
Note. Group A = hydrogen purification, Group B = hydrogen purification and cosmetic acid, GAGS = Global Acne Grading System, M = mean, SD = standard deviation, F = Fisher’s test, p = significance level, η2p = partial eta-square effect size, G = group effect, T = treatment effect, T × G = interaction between group and treatment effect.