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