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.
Demographic characteristics, tobacco use, and place of residence among cases and control subjects
| Cases (n =125) | Controls (n=250) | |
|---|---|---|
| Mean age in years (s.d.) | 55.4 (4.7) | 54.7 (4.3) |
| Number of males (%) | 59 (47.2) | 118 (47.2) |
| Number of smokers (%)1 | 39 (31.2) | 67 (26.8) |
| Village of residence | ||
| Fentou | 44 (35.2) | 89 (35.6) |
| Jingwan | 30 (24.0) | 51 (20.4) |
| Xifeng | 51 (40.8) | 110 (44.0) |
Ever smoking cigarettes for six or more months
