From: Nerve ultrasound in amyotrophic lateral sclerosis: systematic review and meta-analysis
Study ID
ALS
Controls
Mean [mm2]
SD
[mm2]
N
Cartwright [11]
4.5
1.2
20
5.2
1.5
Grimm [20]
1.98
0.6
17
2.18
0.5
28
Total
37
48