Table 1.

Characteristics of the study population

CharacteristicsIncluded in serum vitamin D
Included in VDR genotype
CasesControlsCasesControls
n394397763774
Age (yr), n (%)
    55–59136 (34.5)163 (41.1)253 (33.2)362 (46.8)
    60–64127 (32.2)117 (29.5)240 (31.5)200 (25.8)
    65–6987 (22.1)80 (20.2)172 (22.5)139 (18.0)
    70–7444 (11.2)37 (9.3)96 (12.8)73 (9.4)
Female, n (%)123 (31.2)124 (31.2)232 (30.4)239 (30.9)
Ethnic origin, n (%)
    Non-Hispanic black7 (1.8)8 (2.0)22 (2.9)23 (3.0)
    Non-Hispanic white372 (94.4)375 (94.5)716 (93.8)727 (93.9)
    Others15 (3.8)14 (3.5)25 (3.3)24 (3.1)
Education, n (%)
    <12 yr44 (11.2)26 (6.6)72 (9.4)50 (6.5)
    12 yr/high school equivalent98 (24.9)89 (22.4)187 (24.5)176 (22.8)
    Some college138 (35.0)131 (33.0)274 (35.9)246 (31.8)
    College and above114 (28.9)151 (38.0)230 (30.1)301 (38.9)