Table 1

Characteristics of cases and controls in the NCCCS

CharacteristicAfrican AmericansWhites
Cases (n = 244)Controls (n = 331)Cases (n = 311)Controls (n = 544)
n%n%n%n%
Age (yr)
 Mean61.764.364.364.9
 Median63.066.066.067.0
 Range40–7940–7940–7940–79
Gender
 Male11949.015346.217054.730255.5
 Female12451.017853.814145.324244.5
Total folate intake (μg/day)
 Mean (SD)360.2 (217.2)358.9 (219.3)428.2 (231.4)460.8 (241.3)
 Median292.5274.4353.0409.2
 Range50.4–1375.445.9–1125.080.2–1225.368.7–1293.3
Dietary supplement use
 Yes5824.09027.310935.322942.2
 No18476.024072.720064.731457.8
Alcohol (calories/day)
 Mean (SD)56.0 (221.3)20.2 (74.4)70.4 (151.8)45.8 (93.3)
 Median0000
 Range0–2026.90–739.50–1023.10–756.0
Family history
 Yes4518.4298.86822.0509.3
 No19981.630191.224178.048890.7
Energy intake (kcal/day)
 Mean (SD)2035.8 (968.4)1743.7 (770.2)2021.7 (773.5)1818.5 (628.3)
 Median1841.31581.41937.91773.8
 Range401.3–5795.7415.6–5474.2582.7–6368.9497.1–4454.0
Smoking status
 Never5020.87623.04213.68215.1
 Current8434.810932.916553.424545.1
 Former10744.414644.110233.021639.8
Current BMI (kg/m2)
 Mean (SD)28.5 (6.3)29.7 (7.0)27.4 (5.8)27.7 (5.4)
 Median28.029.126.626.7
 Range14.8–51.215.4–77.516.7–63.512.7–54.5
Annual household income (dollars)
 <15,0008540.512943.95619.56112.3
 15,000–25,0004621.96622.55719.99318.7
 >25,000–50,0005727.16120.79031.316332.8
 >50,0002210.53812.98429.318036.2