Table 1.
Frequency distribution of demographic and risk factors in OSCC patients and controls recruited from The University of Texas MD Anderson Cancer Center and general hospitals in Houston between 1996 and 2002
| Patients n = 325) |
Controls* (n = 335) |
|||
|---|---|---|---|---|
| Characteristics | Number | Percentage | Number | Percentage |
| Age (years) | ||||
| < 40 | 31 | 9.5 | 27 | 8.1 |
| 41 – 55 | 126 | 38.8 | 105 | 31.3 |
| 56 – 70 | 119 | 36.6 | 154 | 46.0 |
| > 70 | 49 | 15.1 | 49 | 14.6 |
| Sex | ||||
| Male | 241 | 74.1 | 269 | 80.3 |
| Female | 84 | 25.9 | 66 | 19.7 |
| Ethnicity | ||||
| Non-Hispanic white | 325 | 100 | 335 | 100 |
| Tobacco smoking | ||||
| Ever | 227 | 69.8 | 239 | 71.3 |
| Never | 98 | 30.2 | 96 | 28.7 |
| Alcohol drinking | ||||
| Ever | 250 | 76.9 | 240 | 71.6 |
| Never | 75 | 23.1 | 95 | 28.4 |
*
The controls were selected so as to be frequency matched to the cases on the factors shown in the table.