Table 3

Nerve CSA in the study population

Examined nerveMeasuring siteGroup A1 nerves
(CSA mean±SD), mm2
Group A2 nerves
(CSA mean±SD), mm2
Group B nerves
(CSA mean±SD), mm2
P1 valueGroup A2 nervesP2 value
Axonal
(CSA mean±SD), mm2
Demyelinating
(CSA mean±SD), mm2
Mediann=13n=61n=36n=50n=11
CT8.0±2.19.2±3.19.0±1.60.1679.3±3.18.9±3.40.664
MF5.9±1.86.6±1.86.4±2.00.3466.5±1.87.1±1.60.247
MH8.1±3.08.0±2.18.5±1.70.4918.1±2.17.7±2.30.691
AX11±3.59.2±3.39.9±2.10.1129.3±3.58.7±2.40.895
Ulnarn=14n=60n=36n=51n=9
GY4.7±1.15.1±1.36.0±1.10.001*5.1±1.35.0±1.50.677
MF6.3±1.86.6±2.06.8±1.50.5576.6±2.06.6±2.10.833
MH6.3±1.77.2±2.28.0±2.00.001*7.2±2.07.8±3.00.833
AX5.4±1.96.9±2.37.0±1.80.0706.9±2.06.9±3.80.900
Tibialn=35n=39n=36n=10n=29
POP19±4.921±6.321±6.00.59324±4.820±6.40.020*
DL8.4±2.79.4±3.611±2.30.009*11±3.78.9±3.60.144
TT8.6±2.89.2±3.311±2.80.0001*10±3.58.9±3.20.382
Peronealn=48n=26n=36n=6n=20
POP15±4.314±4.814±4.40.042*11±2.115±5.10.026*
FN16±6.216±6.015±4.70.73714±3.116±6.70.464
DPN2.4±0.0102.2±1.02.3±1.00.5542.2±0. 982.2±0.670.742
Suraln=24n=50n=36n=21n=29
3.5±1.23.5±1.13.4±1.10.7503.7±1.23.5±1.10.547
  • 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.