Table 1.
Distribution of patient characteristics; San Francisco Bay Area Adult Glioma Study, 1991-2000
| Characteristics | All cases (N = 748) | Self-reported cases (N = 450) |
|---|---|---|
| Age (median ± SE) | 55.7 ± 0.6 | 49.8 ± 0.7 |
| Gender (% male) | 57.1% | 59.1% |
| Ethnicity (% White) | 83.4% | 84.2% |
| Education | ||
| < 12 years | 12.2% | 6.4% |
| High school graduate | 24.2% | 20.9% |
| ≥ 1 year college | 63.6% | 72.7% |
| Histology Group | ||
| Grade II† | 19.1% | 28.2% |
| Grade III‡ | 17.4% | 19.3% |
| Grade IV* | 63.5% | 52.4% |
| Treatment | ||
| Surgical Resection | 83.0% | 91.8% |
| Radiotherapy | 73.7% | 83.1% |
| Chemotherapy | 20.3% | 26.9% |
| Age at first drink | ||
| Never drank alcohol | 9.2% | 8.0% |
| <18 years old | 30.4% | 31.3% |
| 18 - 20 years old | 33.2% | 34.7% |
| ≥21 years old | 26.6% | 26.0% |
| Unknown | 0.7% | 0% |
| Total Packyears | ||
| Never smoked | 43.5% | 46.0% |
| > 0 to ≤ 18.5 | 25.4% | 30.0% |
| > 18.5 | 25.9% | 22.0% |
| Unknown | 5.2% | 2.0% |
† includes 44 astrocytomas, 63 oligodendrogliomas, 36 oligoastrocytomas.
‡ includes 90 astrocytomas, 26 oligodendrogliomas, 14 oligoastrocytomas.
*all (n = 475) glioblastomas.