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Table 9 Mean values of each variable for the different clinical groups.

From: Genetic algorithm with logistic regression for prediction of progression to Alzheimer's disease

Variable HC MCI AD HC convert to MCI/AD MCI convert to AD
     Non_Converters Converters Pvalue (t,chisq) Non_converters Converters Pvalue
v1 28.84 26.20 19.10 28.96 28.23 <0.001 27.37 25.79 0.002
v2 12.90 6.51 3.24 13.24 9.84 <0.001 7.53 5.91 0.034
v3 11.38 3.79 1.02 11.80 7.10 <0.001 5.03 3.04 0.012
v4 0.92 0.31 0.09 0.07 0.27 <0.001 0.60 0.70 0.498
v5 60.55 38.30 26.56 61.35 51.23 <0.001 41.07 35.40 0.001
v6 0.87 -1.37 -2.21 0.95 -0.03 <0.001 -1.18 -1.81 0.001
v7 0.79 -1.62 -2.53 0.89 -0.05 <0.001 -1.38 -2.02 0.002
v8 0.09 -1.16 -1.90 0.12 0.21 0.269 -0.98 -1.22 0.247
v9 -0.21 1.16 2.14 -0.26 0.58 <0.001 0.72 1.65 0.001
v10 0.46 -1.21 -2.06 0.52 -0.10 0.000 -0.70 -1.52 <0.001
v11 -0.54 -1.49 -3.23 -0.49 -0.84 0.052 -1.42 -1.61 0.364
v12 -1.01 -0.78 -0.49 -1.00 -1.00 0.481 -0.76 -0.76 0.488
v13 0.48 -0.82 -1.92 0.50 0.06 0.019 -0.52 -1.13 0.015
v14 0.53 -1.02 -2.15 0.56 0.06 0.016 -0.58 -1.39 0.010
v15 0.31 -1.15 -2.91 0.33 0.34 0.490 -0.36 -1.88 <0.001
v16 12.04 10.04 7.32 12.17 11.06 0.066 9.23 9.57 0.338
v17 12.38 9.03 5.31 12.50 11.87 0.120 9.23 8.83 0.305
v18 12.13 8.25 4.46 12.33 9.71 0.000 8.87 7.57 0.054
v19 12.15 8.60 4.89 12.34 9.87 0.001 9.33 7.59 0.015
v20 0.74 0.18 -1.12 0.78 0.72 0.329 0.44 0.03 0.047
v21 0.72 0.27 -0.82 0.76 0.66 0.260 0.50 0.27 0.206
v22 12.00 11.11 9.10 12.11 12.06 0.465 10.73 11.09 0.285
V23 11.68 9.85 6.53 11.76 10.65 0.019 10.13 9.33 0.131
v24 108.33 105.92 100.84 108.46 107.32 0.227 103.47 107.53 0.072
v25 111.62 108.91 104.22 111.82 110.32 0.132 106.60 110.32 0.072
v26 -0.05 0.48 2.10 -0.03 0.08 0.280 0.63 0.38 0.237
v27 0.02 0.08 0.28 0.03 0.06 0.277 0.26 0.04 0.145
v28 0.06 0.94 4.57 0.02 0.64 0.035 0.90 1.09 0.362
v29 0.08 0.17 0.64 0.07 0.23 0.147 0.19 0.29 0.254
v30 -0.34 0.35 1.83 -0.36 0.13 0.004 0.31 0.39 0.424
v31 0.73 1.55 3.08 0.67 1.06 0.105 1.00 1.76 0.074
v32 -0.32 0.05 0.57 -0.34 -0.02 0.046 -0.10 0.02 0.299
V33 9.75 9.31 7.22 9.79 9.90 0.083 9.60 9.33 0.117
V34 43.12 40.48 36.32 43.31 41.84 0.111 38.40 41.79 0.076
v35 0.04 1.21 5.74 0.03 0.15 0.025 0.73 1.37 <0.001
v36 2.62 3.71 4.06 2.56 3.07 0.116 3.90 3.24 0.148
v37 4.33 4.94 4.98 4.28 4.20 0.428 4.97 4.52 0.238
  1. Columns HC, MCI and AD are the mean values of each variable (cognitive test). The other columns are the means values for the groups of converters and non-converters from HC or from MCI with the t-test (chi-square test for variable 4, a dichotomous variable with values Pass and Fail) for the comparison between the 2 groups.