Table 2.
Variables distribution summary for biomarkers
| ROC variable | No Obs | Obs. without missing data | Min-imum | Max-imum | Mean |
Standard
deviation |
Median | Mean absolute deviation | Fitted distribution |
|---|---|---|---|---|---|---|---|---|---|
| Visual domain | |||||||||
| Visual span | 134 | 126 | 0.00 | 8.00 | 5.476 | 1.35 | 6.00 | 1.00 | Pert |
| Visual speed of processing discrepancy (% of age) | 134 | 122 | −90.00 | 207.69 | 6.01 | 54.44 | −5.55 | 30.24 | Log Normal |
| Distance vision on right | 134 | 128 | 0.00 | 36.00 | 7.98 | 6.03 | 6.00 | 1.50 | Chi-square |
| Auditory domain | |||||||||
| Reverse digit span | 134 | 127 | 2.00 | 8.00 | 4.22 | 1.33 | 4.00 | 1.00 | Gamma (3P) |
| Competing words discrepancy (% of pass score) | 134 | 124 | −69.23 | 50.00 | 0.55 | 22.61 | 3.84 | 15.38 | Johnson SB |
| Auditory speed of processing discrepancy (% of age) | 134 | 121 | −100.00 | 220.00 | −3.83 | 56.68 | −18.00 | 31.12 | Gen. Extreme Value |
| Catecholamine domain | |||||||||
| Dopamine | 134 | 133 | 45.00 | 358.00 | 142.47 | 53.64 | 129.0 | 32.00 | Log-Logistic |
| Noradrenaline | 134 | 133 | 3.00 | 106.00 | 25.278 | 18.53 | 19.00 | 9.00 | Johnson SB |
| Adrenaline | 134 | 133 | 0.00 | 27.00 | 4.413 | 5.10 | 2.00 | 1.00 | Log-Logistic |
| HPL/Creatinine model | 134 | 133 | 0.35 | 40.04 | 4.586 | 5.94 | 2.47 | 1.18 | Burr |
| Nutrition-Biochemistry domain | |||||||||
| Free copper to Zinc ratio | 134 | 133 | −1.85 | 1.60 | 0.267 | 0.52 | 0.31 | 0.31 | Log-Logistic |
| B6 activation | 134 | 129 | 12.80 | 1570.0 | 140.44 | 164.6 | 90.00 | 25.00 | Gen. Extreme Value |
| Red cell folate | 134 | 133 | 506.00 | 3291.0 | 1788.9 | 448.7 | 1733. | 236.00 | Log-Logistic |
| Serum B12 | 134 | 134 | 42.00 | 1388.0 | 406.15 | 178.5 | 367.0 | 104.00 | Gen. Extreme Value |
| Vitamin D | 134 | 132 | 13.00 | 149.00 | 52.462 | 22.15 | 52.00 | 14.00 | Dagum |