Table 2. Clinical characteristics of the SMA patients who died.

Patient no.	Gender	Age at onset, months	Clinical type	Initial presentation	Ventilator	Age at death, months
8	Male	1	1	Hypotonia	None	3
15	Male	2	1	Respiratory difficulty	Assisted/controlled mode from 7 months	89
23	Male	0.1	1	Hypotonia	None	2

SMA: spinal muscular atrophy.