Table 3.

Correlation coefficients between total respiratory resistance, respiratory reactance and thoracoabdominal motion indices of asynchrony in patients with mucopolysaccharidosis type IVA (Morquio syndrome).

Parameter		%RC (%)	PhRTB (%)	Phθ (o)
Rrs5	cmH2O/L/s	−0.99 **	0.95 *	0.71
Rrs10	cmH2O/L/s	−0.96 **	0.89	0.61
Rrs15	cmH2O/L/s	−0.99 **	0.83	0.50
Rrs20	cmH2O/L/s	−0.99 **	0.84	0.51
Rrs25	cmH2O/L/s	−0.99 **	0.85	0.53
Rrs35	cmH2O/L/s	−0.99 **	0.82	0.43
Xrs5	cmH2O/L/s	0.80	−0.89	−0.93 *
Xrs10	cmH2O/L/s	0.80	−0.95 *	−0.93 *
Xrs15	cmH2O/L/s	0.80	−0.96 *	−0.82
Xrs20	cmH2O/L/s	0.99 **	−0.92	−0.73
Xrs35	cmH2O/L/s	0.80	−0.90	−0.80

^**p<0.01;

^*p< 0.05.

Rrs: respiratory resistance; Xrs: respiratory reactance; f: frequency; %RC: rib cage contribution to the tidal volume excursions; PhRTB: phase relation during total breath; Phθ: phase angle.