Mean servings Xk Cases d Total n Rate Y Cumulative proportions Concentration index CI Attributable risk AR Actual RR Logistic mode F(k) L(k) 0 13 17 0.765 0.017 0.027 -0.0004 -0.5294 1.529 1.179 1 36 60 0.600 0.079 0.100 -0.0013 -0.2057 1.200 1.145 2 55 99 0.556 0.180 0.213 -0.0040 -0.1239 1.111 1.112 3 70 137 0.511 0.321 0.357 -0.0046 -0.0507 1.022 1.078 4 77 151 0.510 0.475 0.514 -0.0084 -0.0494 1.020 1.044 5 59 125 0.472 0.603 0.635 0.0004 -0.0096 0.944 1.010 6 54 102 0.529 0.708 0.746 -0.0087 -0.0551 1.059 0.976 7 33 74 0.446 0.784 0.814 -0.0003 -0.0063 0.892 0.941 8 33 64 0.516 0.849 0.881 0.0002 -0.0365 1.031 0.907 9 24 46 0.522 0.897 0.930 -0.0159 -0.0383 1.043 0.874 10 10 36 0.278 0.933 0.951 -0.0061 0.0122 0.556 0.840 11 6 18 0.333 0.952 0.963 -0.0032 0.0048 0.667 0.807 12 9 21 0.429 0.973 0.982 -0.0071 -0.0044 0.857 0.774 14 4 15 0.267 0.989 0.990 -0.0010 0.0042 0.533 0.711 18 5 11 0.455 1.000 1.000 0.0000 0.0000 0.909 0.591 Total 488 976 0.500     -0.0603 -0.0603 1.000 1.000 Gini index GI=0.0734; Correlation coefficient ρ=-0.583; Determination coefficient = 34%.

Table 2: Concentration Index and Relative Risk for the Fruit and Vegetable Intake and Colon Polyps.