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.
Characteristics of the study subjects
| Non-GK | GK | P value | |
|---|---|---|---|
| Gender | 1.000 | ||
| Female | 1400 (90.91%) | 140 (9.09%) | |
| Male | 1370 (90.91%) | 137 (9.09%) | |
| Age | 0.996 | ||
| Under 30 | 386 (90.82%) | 39 (9.18%) | |
| 30-50 | 1202 (91.06%) | 118 (8.94%) | |
| 50-70 | 1024 (90.78%) | 104 (9.22%) | |
| Over 70 | 158 (90.80%) | 16 (9.20%) | |
| Total | 2770 | 277 | |
| Mean (SD) | 46.3 (15.3) | 46.3 (15.3) | 0.993 |
