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.
| Age group (yr) | Sex | Smoking history | ||
|---|---|---|---|---|
| Male | Female | Male | Female | |
| ≤ 20 | 40 (42.6) | 54 (57.4) | 7 (17.5) | 1 (1.9) |
| 20–40 | 203 (40.5) | 298 (59.5) | 90 (44.3) | 6 (2.0) |
| 40–60 | 640 (40.2) | 954 (59.8) | 332 (51.9) | 25 (2.6) |
| ≥ 60 | 486 (46.2) | 565 (53.8) | 279 (57.4) | 30 (5.3) |
Values are presented as number of patients (%).
