Table 1.

Descriptive statistics of LGMD and DMD groups. LGMD: limb girdle muscular dystrophy; DMD: Duchenne muscular dystrophy; MFM: Motor Function Measure; TIME: timed immersion mouth expiration; TINE: timed immersion nose expiration; FVC sitting: percentual forced vital capacity on sitting position; FVC supine: percentual forced vital capacity on supine position; PEF sitting: peak expiratory flow on sitting position (mL/min); PEF supine: peak expiratory flow on supine position (L/min)

Variable	Group	Mean	Minimum	Lower quartile	Median	Upper quartile	Maximum	Standard deviation	Standard Error	P-value (T test)
Age (years)	LGMD	25.87	12.00	15.00	28.00	33.00	35.00	7.15	1.79	0.053
	DMD	22.13	12.00	16.00	16.00	29.00	35.00	6.21	0.97
Vignos (score)	LGMD	5.56	1.00	4.00	6.00	7.00	8.00	2.12	0.53	0.539
	DMD	6.37	2.00	7.00	7.00	8.00	8.00	1.89	0.30
MFM (score)	LGMD	60.81	19.00	51.00	64.00	74.50	90.00	18.56	4.64	0.661
	DMD	52.24	21.00	40.00	51.00	68.00	85.00	17.15	2.68
TIME (seconds)	LGMD	29.56	11.00	17.50	31.00	38.50	59.00	13.16	3.29	0.713
	DMD	25.10	5.00	17.00	22.00	30.00	60.00	12.34	1.93
TINE (seconds)	LGMD	20.81	4.00	13.00	20.50	28.50	40.00	9.86	2.47	0.263
	DMD	18.02	5.00	11.00	13.00	20.00	61.00	12.89	2.01
FVC sitting	LGMD	77.87	20.00	62.00	88.00	97.50	109.00	26.12	6.53	0.706
	DMD	70.95	18.00	48.00	75.00	99.00	114.00	28.79	4.50
FVC supine	LGMD	73.50	14.00	59.00	82.50	93.00	96.00	23.12	5.78	0.274
	DMD	66.54	14.00	41.00	68.00	94.00	112.00	30.03	4.69
PEF sitting	LGMD	356.87	130.00	260.00	380.00	405.00	600.00	137.68	34.42	0.084
	DMD	260.00	50.00	210.00	250.00	300.00	540.00	97.62	15.25
PEF supine	LGMD	296.25	120.00	200.00	350.00	370.00	510.00	117.52	29.38	0.145
	DMD	236.59	40.00	200.00	220.00	270.00	480.00	91.61	14.31