Table 3.

Relative age-dependent inspiratory vital capacity (VC IN%) in SMA II and IIIa non-surgery patients

VC IN%	SMA II (N = 40)		SMA IIIa (N = 15)
Patient’s age (years)	n	Ø, ±, min – max, median	n	Ø, ±, min – max, median
4 - 6	5	Ø 54, ± 13, 41 - 70, 58	-	-
7 - 10	19	Ø 44, ± 21, 14 - 91, 43	4	Ø 80, ± 23, 56 - 108, 78
11 - 13	9	Ø 37, ± 22, 10 - 86, 32	5	Ø 56, ± 24, 17 - 73, 70
14 - 15	3	Ø 37, ± 11, 25 - 47, 39	6	Ø 43, ± 11, 31 - 63, 40
16 - 20	4	Ø 42, ± 18, 25 - 63, 43	-	-