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.
Demographics of subjects included for PDL collection.
| GROUP | SUBJECT CODE | SEX | AGE (years) |
|---|---|---|---|
| A (2-day OTM) | a | M | 20.9 |
| b | M | 25.9 | |
| c | F | 18.0 | |
| d | M | 20.8 | |
| B (7-day OTM) | b | M | 25.9 |
| e | F | 24.1 | |
| f | F | 13.8 | |
| f | F | 13.8 | |
| g | F | 28.4 | |
| C (14-day OTM) | h | M | 26.7 |
| c | M | 18.0 | |
| i | F | 17.2 | |
| i | F | 17.2 | |
| j | F | 20.2 | |
| k | F | 3.9 | |
| Mean AGE ± SD | 19.9 ± 4.7 |
