Table 1.

Characteristics of cases and controls in two series, the San Francisco Bay Area Adult Glioma Study 1991–2000

VariablesBoth series
Series 1 (1991–1995)
Series 2 (1997–2000)
CasesControlsCasesControlsCasesControls
Total no. participants879864476462403402
No. participants with GST genotype data (%)458 (52)505 (58)187 (39)167 (36)271 (67)338 (84)
Average age (SE)
    Total participants55 (0.55)55 (0.56)54 (0.77)54 (0.78)56 (0.78)56 (0.79)
    Genotyped participants51 (0.68)56 (0.70)48 (1.1)53 (1.2)52 (0.88)57 (0.83)
% Female
    Total participants444643454546
    Genotyped participants414637474446
Ethnic group
    Total participants
        % White838484868183
        % Black445344
        % Other131211111514
    Genotyped participants
        % White838786968184
        % Black444034
        % Other13101041512
Histological distributiona
    Total no. participants (%)
        Glioblastoma522 (59)281 (59)241 (60)
        Anaplastic astrocytoma and astrocytoma151 (17)89 (19)62 (15)
        Oligoastrocytoma (mixed)57 (6)47 (10)10 (2)
        Oligodendroglioma92 (11)34 (7)58 (14)
        Otherb57 (6)25 (5)32 (8)
    No. genotyped participants (%)
        Glioblastoma223 (49)82 (44)141 (52)
        Anaplastic astrocytoma and astrocytoma85 (18)39 (21)46 (17)
        Oligoastrocytoma (mixed)40 (9)31 (16)9 (3)
        Oligodendroglioma70 (15)19 (10)51 (19)
        Other40 (9)16 (9)24 (9)
  • a Histological diagnosis based on uniform neuropathology review (except for two glioblastoma patients in series 2).

  • b Other includes ependymoma (8), juvenile pilocytic astrocytoma (16), medulloblastoma (10), ganglioblastoma (2), and other (21).