Table 1.
Distribution of oral cancer cases and controls according to demographic characteristics
| n | Mean age, year (range) | Sex (female/male) | Smoking, mean ± S.D. (py) | ||
|---|---|---|---|---|---|
| Caucasians | Cases | 113 | 62.0 (28–91) | 33/80 | 49.0 ± 40.7a |
| Controls | 226 | 59.9 (25–91) | 80/146 | 20.8 ± 34.8b | |
| African Americans | Cases | 58 | 58.6 (39–84) | 16/42 | 42.2 ± 29.0 |
| Controls | 173 | 59.6 (34–88) | 66/107 | 20.4 ± 33.6c |
a
One subject was not included in mean smoking calculations due to incomplete smoking information.
b
Two subjects were not included in mean smoking calculations due to incomplete smoking information.
c
Five subjects were not included in mean smoking calculations due to incomplete smoking information.