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Table 1 Distribution of patient characteristics; San Francisco Bay Area Adult Glioma Study, 1991-2000

From: Daily intake of antioxidants in relation to survival among adult patients diagnosed with malignant glioma

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%
  1. includes 44 astrocytomas, 63 oligodendrogliomas, 36 oligoastrocytomas.
  2. includes 90 astrocytomas, 26 oligodendrogliomas, 14 oligoastrocytomas.
  3. *all (n = 475) glioblastomas.