. 2018 Jun 20;38(6):765–768. [Article in Chinese] doi: 10.3969/j.issn.1673-4254.2018.06.20

2.

各组呼吸阻力比较

Parameters of respiratory resistance in the groups

Prameter	Non-OSAHS (AHI < 5)	Mild-moderate OSAHS (5≤AHI < 30)	Severe OSAHS (AHI≥30)	P
^*P < 0.05 vs non-OSAHS group, ^#P < 0.05 vs mild-moderate OSAHS group; Z5: Respiratory system impedance at 5 Hzs; R5: Respiratory system resistance at 5 Hzs; R20: Respiratory system resistance at 20 Hzs; X5: Respiratory system reactance at 5 Hzs; FEF50: Forced expiratory flow after 50% of the FVC has been exhaled; FEF75:Forced expiratory flow after 75% of the FVC has been exhaled; MMEF: Maximum mid-expiratory flow; %pred: Percent predicted.
Z5 (kPa·L^-1·s^-1)	0.40 (0.32, 0.52)	0.39 (0.33, 0.51)	0.44 (0.36, 0.56)	0.141
R5% pred	121.2 (88.4, 148.3)	134.2 (116.2, 166.2)	149.5 (120.5, 195.4)^*	0.003
R20% pred	112.1 (90.8, 127.0)	130.8 (113.2, 153.7)^*	143.7 (115.8, 168.8)^*	0.000
X5 (kPa·L^-1·s^-1)	-0.10 (-0.17, -0.07)	-0.09 (-0.13, -0.06)	-0.10 (-0.13, -0.07)	0.842
FEF_50%% pred	78.4 (64.4, 96.6)	88.8 (72.8, 106.6)	99.4 (80.7, 120.0)^*#	0.001
FEF_75%% pred	66.0 (52.3, 78.4)	67.3 (48.2, 91.2)	69.0 (54.3, 97.8)	0.404
MMEF% pred	73.5 (60.3, 91.1)	80.1 (65.8, 97.9)	87.3 (72.4, 111.7)^*	0.012