All participants | Low NAL | High NAL | p | |
---|---|---|---|---|
Gender (N, males/females) | 32/68 | 19/46 | 13/22 | .419 |
Age (years) | 78.18 ± 5.52 | 77.61 ± 5.55 | 79.22 ± 5.38 | .165 |
APOE ε4 carriers (N, %) | 21 (21) | 5 (7.7) | 16 (45.7) | < .0001 |
Education (years) | 14.43 ± 3.26 | 14.84 ± 3.37 | 13.64 ± 2.91 | .078 |
MMSE (score) | 28.61 ± 1.14 | 28.50 ± 1.16 | 28.80 ± 1.10 | .225 |
NAL (SUVR) | 1.35 ± 0.31 | 1.15 ± 0.08 | 1.71 ± 0.26 | – |
Tryptophan (μM) | 43.33 ± 7.72 | 42.87 ± 8.15 | 44.17 ± 6.87 | .350 |
Kynurenine (μM) | 2.23 ± 0.58 | 2.12 ± 0.52 | 2.41 ± 0.63 | < .05 |
Kynurenine to tryptophan ratio (K/T) | 52.61 ± 15.44 | 50.73 ± 13.94 | 56.08 ± 17.58 | .121 |
Kynurenic Acid (nM) | 52.06 ± 27.44 | 49.71 ± 26.25 | 56.41 ± 29.40 | .238 |
3-Hydroxykynurenine (nM) | 119.45 ± 37.47 | 117.74 ± 34.73 | 122.60 ± 42.42 | .554 |
3-Hydroxyanthranilic acid (nM) | 22.63 ± 9.14 | 22.15 ± 9.25 | 23.50 ± 8.99 | .406 |
Anthranilic acid (nM) | 35.48 ± 19.79 | 31.40 ± 14.99 | 43.04 ± 25.02 | < .005 |
Picolinic acid (nM) | 109.38 ± 49.82 | 112.06 ± 56.25 | 104.40 ± 35.07 | .572 |
Quinolinic acid (nM) | 171.83 ± 74.48 | 169.76 ± 75.89 | 175.66 ± 72.71 | .689 |