Table 1.

Patients’ characteristics

Cases　(n = 26)	Number
Age (years)
Median (range)	65 (45–84)
Sex
Male	18
Female	8
Body mass index (kg/m2)
Median (range)	17.6 (12.4–26.2)
ALS types
Bulbar (b-ALS)	15
Spinal (s-ALS)	11
Duration from disease onset to the surgery (months)
Median (range)	31 (5–110)
Preoperative tracheostomy
Yes	11
No	15
ASA
1	0
2	5
3	17
4	4
Albumin (g/dL)	3.6 (2.3–4.5)
Anesthesia
General	20
Local	6

ALS Amyotrophic lateral sclerosis, ASA American Society of Anesthesiologist