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.
The frequency distributions of cigarette smoking in the exposed and unexposed groups
| Group Smoking | Unexposed (n = 80) | Exposed (n = 84) | Total n (%) |
|---|---|---|---|
|
| |||
| n (%) | n (%) | ||
| Never smoker | 70 (87.5) | 71 (84.5) | 141 (86.0) |
| Former smoker | 3 (3.8) | 3 (3.6) | 6 (3.7) |
| Convent smoker | 7 (8.8) | 10 (11.9) | 17 (10.4) |
