Table 1

Major characteristics of the study population
Year of birth Cases (%) Controls (%)
< 1930 292 (12.2) 63 (14.8)
1930–39 859 (35.8) 160 (37.5)
1940–49 577 (24.0) 96 (22.5)
1950–59 367 (15.3) 64 (15.0)
1960–69 199 (8.3) 37 (8.7)
1970+ 107 (4.5) 7 (1.6)
Total 427 (100.0) 2.401 (100.0)
Community size
< 5.000 134 (31.4) 728 (30.3)
5.000 < 10.000 83 (19.4) 435 (18.1)
10.000 < 100.000 127 (29.7) 739 (30.8)
100.000+ 83 (19.4) 499 (20.8)
Chi2 = 0.92/p=0.82
Educational attainment
Primary school or less 289 (67.7) 1329 (55.4)
Secondary school 77 (18.0) 625 (26.0)
College 61 (14.3) 447 (18.6)
Chi2 = 22.8/p ≤0.0001
Site of malignancies
Nasal cavity 112 -
Paranasal sinuses 135 -
Nasopharynx 180 -

Greiser et al.

Greiser et al. BMC Cancer 2012 12:506   doi:10.1186/1471-2407-12-506

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