Examined nerve | Measuring site | Group A1 nerves (CSA mean±SD), mm2 | Group A2 nerves (CSA mean±SD), mm2 | Group B nerves (CSA mean±SD), mm2 | P1 value | Group A2 nerves | P2 value | |
Axonal (CSA mean±SD), mm2 | Demyelinating (CSA mean±SD), mm2 | |||||||
Median | n=13 | n=61 | n=36 | n=50 | n=11 | |||
CT | 8.0±2.1 | 9.2±3.1 | 9.0±1.6 | 0.167 | 9.3±3.1 | 8.9±3.4 | 0.664 | |
MF | 5.9±1.8 | 6.6±1.8 | 6.4±2.0 | 0.346 | 6.5±1.8 | 7.1±1.6 | 0.247 | |
MH | 8.1±3.0 | 8.0±2.1 | 8.5±1.7 | 0.491 | 8.1±2.1 | 7.7±2.3 | 0.691 | |
AX | 11±3.5 | 9.2±3.3 | 9.9±2.1 | 0.112 | 9.3±3.5 | 8.7±2.4 | 0.895 | |
Ulnar | n=14 | n=60 | n=36 | n=51 | n=9 | |||
GY | 4.7±1.1 | 5.1±1.3 | 6.0±1.1 | 0.001* | 5.1±1.3 | 5.0±1.5 | 0.677 | |
MF | 6.3±1.8 | 6.6±2.0 | 6.8±1.5 | 0.557 | 6.6±2.0 | 6.6±2.1 | 0.833 | |
MH | 6.3±1.7 | 7.2±2.2 | 8.0±2.0 | 0.001* | 7.2±2.0 | 7.8±3.0 | 0.833 | |
AX | 5.4±1.9 | 6.9±2.3 | 7.0±1.8 | 0.070 | 6.9±2.0 | 6.9±3.8 | 0.900 | |
Tibial | n=35 | n=39 | n=36 | n=10 | n=29 | |||
POP | 19±4.9 | 21±6.3 | 21±6.0 | 0.593 | 24±4.8 | 20±6.4 | 0.020* | |
DL | 8.4±2.7 | 9.4±3.6 | 11±2.3 | 0.009* | 11±3.7 | 8.9±3.6 | 0.144 | |
TT | 8.6±2.8 | 9.2±3.3 | 11±2.8 | 0.0001* | 10±3.5 | 8.9±3.2 | 0.382 | |
Peroneal | n=48 | n=26 | n=36 | n=6 | n=20 | |||
POP | 15±4.3 | 14±4.8 | 14±4.4 | 0.042* | 11±2.1 | 15±5.1 | 0.026* | |
FN | 16±6.2 | 16±6.0 | 15±4.7 | 0.737 | 14±3.1 | 16±6.7 | 0.464 | |
DPN | 2.4±0.010 | 2.2±1.0 | 2.3±1.0 | 0.554 | 2.2±0. 98 | 2.2±0.67 | 0.742 | |
Sural | n=24 | n=50 | n=36 | n=21 | n=29 | |||
3.5±1.2 | 3.5±1.1 | 3.4±1.1 | 0.750 | 3.7±1.2 | 3.5±1.1 | 0.547 |
Group A1: nerves with normal NCS in patients with SLE; group A2: SLE nerves with abnormal NCS in patients with SLE; group B: nerves of healthy subjects (with normal NCS).
P1: one-way analysis of variance test was used; P2: Student’s t-test was used.
*P<0.05 is significant.
AX, axilla; CSA, cross-sectional area; CT, carpal tunnel inlet; DL, distal leg (5 cm above medial malleolus); DPN, deep peroneal nerve at anterior aspect of the ankle; FN, fibular neck; GY, Guyon’s canal; MF, mid-forearm; MH, mid-humerus; n, number of nerves; NCS, nerve conduction study; POP, popliteal fossa; TT, tarsal tunnel.