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 | Â | Â |
   < 12 years | 12.2% | 6.4% |
   High school graduate | 24.2% | 20.9% |
   ≥ 1 year college | 63.6% | 72.7% |
Histology Group | Â | Â |
   Grade II†| 19.1% | 28.2% |
   Grade III‡ | 17.4% | 19.3% |
   Grade IV* | 63.5% | 52.4% |
Treatment | Â | Â |
   Surgical Resection | 83.0% | 91.8% |
   Radiotherapy | 73.7% | 83.1% |
   Chemotherapy | 20.3% | 26.9% |
Age at first drink | Â | Â |
   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 | Â | Â |
   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% |