| Controls (n = 30) | CV | Depression (n = 30) | CV |
Free fraction (FFT) | 8.4 ± 1.1 | 0.13 | 5.9 ± 0.9* | 0.15 |
Albumin bound | 31.6 ± 5.1 | 0.16 | 32.3 ± 5.0 | 0.15 |
Total (T) | 40.0 ± 5.3 | 0.13 | 38.2 ± 4.0 | 0.10 |
FFT/T ratio | 0.168 ± 0.020 | 0.11 | 0.153 ± 0.02 | 0.13 |
FFT/NAA ratio | 0.006 ± 0.001 | 0.20 | 0.004 ± 0.001 | 0.20 |