Table 5.
Nerve conduction study results pre- and post-DNS; mean ± SD and effect size (median value and range), where positive effect size value indicates improvement
| Authors | Study type | Limb/group | n | Posterior tibial
|
Common peroneal
|
Superficial peroneal
|
Sural
|
||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pre-DNS | Post-DNS (effect size) |
Pre-DNS | Post-DNS (effect size) |
Pre-DNS | Post-DNS (effect size) |
Pre-DNS | Post-DNS (effect size) |
||||
| DNS groups | |||||||||||
| Amplitude (mV) | |||||||||||
| Macare van Maurik et al42 | Randomized limb | DNS limb | 40 | 4.7±4.0 | 4.1 ±3.9 −0.2 (0.1−0.2) |
3.1 ±2.6 | 2.1 ±1.8 −0.4 (0.4−0.6) |
3.0±4.9 | 2.3±4.5 −0.1 (0.1−0.2) |
||
| Distal latency (ms) | |||||||||||
| Macare van Maurik et al42 | Randomized limb | DNS limb | 40 | 4.3±1.4 | 4.5± 1.4 −0.1 (0.1−0.2) |
4.3±1.1 | 4.7±1.2 −0.3 (0.3−0.5) |
||||
| Conduction velocity (m/s) | |||||||||||
| Liao28 | Observational | DNS, focal pain | 145 | 33.5±3.1 | 41.8±2.6 2.9 (2.7−3.8) |
37.8±3.4 | 42.5±2.4 1.6 (1.4–2.1) |
35.8±2.5 | 42.2±3.1 2.3 (1.9−3.0) |
37.8±3.4 | 43.6±2.7 1.9 (1.6−2.5) |
| Liao28 | Observational | DNS diffuse pain | 161 | 35.5±3.6 | 42.0±2.8 2.0 (1.7−2.6) |
36.8±1.9 | 42.2±2.9 2.2 (1.9−2.9) |
37.6±2.9 | 43.6±2.3 2.3 (2.0−3.0) | 37.7±3.9 | 43.2±3.6 1.5 (1.2−2.9) |
| Macare van Maurik et al42 | Randomized limb | DNS limb | 40 | 36±1 3 | 37±10* 0.1 (0.1−0.1) |
38±9* | 37±8* −0.1 (0.1−0.1) |
23±21 | 19±21 ’ −0.2 (0.2−0.2) |
||
| Zhang40 | Observational | DNS limb | 560 | 28.2±7.2 | 36.3±3.3 1.4 (1.2−2.0) | 33.3±5.3 | 42.2±1.4 2.3 (1.7−3.4) | 35.2±8.1 | 41.6±4.5 1.0 (0.8−1.3) |
40.3±16.6a | 39.7±3.1 −0.1 (0.0−0.1) |
| Average CV | DNS | 30.7±7.3 | 38.2±4.5 | 34.2+5.1 | 41.9±2.8 | 35.2±8.3 | 41.1+7.6 | 39.4+13.6 | 40.8±3.5 | ||
| Effect size | 1.7 | 2.1 | 1.4 | 0.5 | |||||||
| Control groups/limbs Amplitude (mV) | |||||||||||
| Macare van Maurik et al42 | Randomized limb | Control | 40 | 4.3±3.7 | 4.1 ±3.6 0.1 (0.1−0.1) | 3.4±2.7 | 2.9±2.4 0.2 (0.2−0.2) | 3.7±5.0 | 2.6±3.5 0.2 (0.2−0.3) | ||
| Distal latency (ms) | |||||||||||
| Macare van Maurik et al42 | Randomized limb | Control | 40 | 4.3±1.3 | 4.1 ±1.6 0.1 (0.1−0.2) |
4.1±1.4 | 4.4±1.3 −0.2 (0.2−0.3) |
||||
| Conduction velocity (m/s) | |||||||||||
| Liao28 | Observational | Control | 92 | 36.7±3.4 | 31.6±3.5 −1.5 (1.2−1.9) |
33.8±2.8 | 28.6±3.3 −1.7(1.4−2.2) |
38.6±3.7 | 34.4±3.6 −1.1 (1.0−1.5) |
37.4±2.8 | 37.0±2.5 −0.2 (0.1−0.2) |
| Macare van Maurik et al42 | Randomized limb | Control | 40 | 36±12 | 35±13a −0.1 (0.1−0.1) |
37±l 2 | 37±10a 0.0 (0.0−0.0) |
22±20 | 21 ±21a −0.1 (0.0−0.1) |
||
| Average CV | Control | 1 | 36.5±7.1 | 32.6+7.8 | 34.8±7. | 31.1±7.2 | 33.6±13.7 | 30.3±13.4 | 37.4±2.8 | 37.0±2.5 | |
| Effect size | −1.1 | −1.2 | −0.8 | −0.2 | |||||||
Note:
a
The large SD is unexplained.
Abbreviations: CV, conduction velocity; DNS, decompression nerve surgery.