Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Improvement of acne after using therapy
| Improvement | N | % | χ2-test |
|---|---|---|---|
| No improvement | 29 | 21.5 | χ2 = 10.7; df = 2; p = 0.01 |
| Slight improvement | 9 | 6.7 | |
| Significant improvement | 25 | 18.5 | |
| No acne | 72 | 53.3 | |
| Total | 135 | 100.0 |
Value of p < 0.01. There were no significant differences between groups (p < 0.01)
