Table 1.

Demographic and cumulative lead exposure distributions for participants with glioma, glioblastoma multiforme, meningioma, and controls in the National Cancer Institute Adult Brain Tumor Study

CharacteristicsGlioma (n = 362)Glioblastoma multiforme* (n = 176)Meningioma (n = 134)Controls (n = 494)
Sex, n (%)
    Male198 (55)92 (52)30 (22)227 (46)
    Female164 (45)84 (48)104 (78)267 (54)
Age at interview, n (%)
    18-2941 (11)3 (2)1 (1)55 (11)
    30-49137 (38)37 (21)53 (40)209 (42)
    50-69121 (33)83 (47)57 (43)171 (35)
    70-9063 (17)53 (30)23 (18)59 (12)
Hospital site, n (%)
    Phoenix, AZ160 (44)70 (40)58 (43)229 (46)
    Boston, MA133 (37)63 (36)65 (49)181 (37)
    Pittsburgh, PA69 (19)43 (24)11 (8)84 (17)
Cumulative lead exposure (μg/m3 y), n (%)
    0201 (56)92 (52)93 (69)281 (57)
    >0-150102 (28)45 (26)24 (18)149 (30)
    >150-30019 (5)10 (6)5 (4)29 (6)
    >300-45010 (3)6 (2)3 (2)14 (3)
    >450-6003 (1)2 (1)2 (2)3 (1)
    >60012 (3)10 (6)5 (4)15 (3)
    Unknown15 (4)11 (6)2 (2)3 (1)
  • * Cases with glioblastoma multiforme are a subset of the cases with glioma.