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.
Results of the threshold multivariate analysis according to the age group.
| Frequency (kHz) | F | g.l. | p |
|---|---|---|---|
| 0.25 | 14.6 | 1 | < 0.001 |
| 0.5 | 7.0 | 1 | 0.010 |
| 1 | 9.1 | 1 | 0.004 |
| 2 | 9.7 | 1 | 0.003 |
| 3 | 8.5 | 1 | 0.005 |
| 4 | 9.4 | 1 | 0.003 |
| 6 | 6.9 | 1 | 0.011 |
| 8 | 13.7 | 1 | < 0.001 |
| 10 | 39.7 | 1 | < 0.001 |
| 12.5 | 117.1 | 1 | < 0.001 |
| 16 | 63.0 | 1 | < 0.001 |
