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.
Comparison of efficacy between the two groups (%).
| Groups | n | Markedly effective | Effective | Ineffective | Total effectiveness (%) |
|---|---|---|---|---|---|
| Observation group | 30 | 22 (73.3) | 6 (20.0) | 2 (6.7) | 28 (93.3) |
| Control group | 30 | 16 (53.3) | 5 (16.7) | 9 (30.0) | 21 (70.0) |
| X2 | / | / | / | / | 5.455 |
| p | / | / | / | / | 0.020 |
