Table 1.

Characteristics of the included subjects

Controls number (%)All lymphoid neoplasms number (%)P value
Age
    <42130 (21.6)95 (17.7)
    43-56123 (20.4)107 (20.0)
    57-67126 (20.9)106 (19.8)
    68-7399 (16.4)108 (20.1)
    >73125 (20.7)120 (22.4)0.30
Gender
    Males314 (52.1)294 (54.9)
    Females289 (47.9)242 (45.1)0.35
Study center
    Barcelona504 (83.6)423 (78.9)
    Madrid55 (9.1)68 (12.7)
    Tarragona (Reus and Tortosa)44 (7.3)45 (8.4)0.10
Ever school attendance
    Never63 (10.4)70 (13.1)
    Ever540 (89.6)466 (86.9)0.17
Total603 (100)536 (100)