Table 3 Correlations of magnetization transfer ratio (MTR) with demographical, serological, clinical, and electrophysiological data

Age

-0.21

0.482^b

-0.22

0.548^a

-0.38

0.047^a

BMI (kg/m²)

-0.52

0.059^b

-0.10

0.775^a

-0.36

0.061^a

Diabetes duration (years)

NA

NA

-0.12

0.734^a

-0.29

0.147^b

HbA1c (mmol/mol)

-0.01

0.964^b

-0.63

 < 0.050^a

-0.17

0.383^a

eGFR (mL/min)

0.24

0.141^b

-0.18

0.713

-0.05

0.833^a

NDS

-0.43

0.127^b

-0.56

0.094^a

0.26

0.211^a

NSS

0.03

0.934^b

-0.34

0.344^a

0.04

0.853^b

Sural NCV (m/s)

-0.10

0.711^b

-0.02

0.988^b

-0.50

0.034

Sural SNAP (μV)

0.30

0.276^b

0.40

0.250^a

-0.19

0.403

Peroneal nerve NCV (m/s)

0.05

0.857^b

0.53

0.118^a

-0.44

0.031^a

Peroneal nerve CMAP (mV)

0.29

0.318^b

0.16

0.661^a

-0.11

0.612^a

Peroneal nerve DML (ms)

-0.41

0.145^b

0.13

0.713^b

0.31

0.142^b

Tibial nerve NCV (m/s)

0.33

0.250^b

0.71

0.021^a

-0.40

< 0.050^a

Tibial nerve CMAP (mV)

0.17

0.553^b

0.16

0.387^a

-0.31

0.136^a

Tibial nerve DML (ms)

0.07

0.805^b

0.07

0.854^b

0.13

0.539^b