TABLE 4.

KEY RESULTS FROM SUBANALYSIS OF NINE MATCHED SUBJECTS

Subject Characteristic	Control	OSA
Number of units	475	420
Duration, ms	10.18 ± 0.16	11.62 ± 0.17*
Amplitude, μV	390.33 ± 12.40	377.67 ± 12.56
Area, μV·ms	525.77 ± 16.01	595.76 ± 18.23*
Phases	2.87 ± 0.03	2.99 ± 0.04
Turns	3.61 ± 0.07	3.71 ± 0.07
Area-to-amplitude ratio	1.44 ± 0.02	1.64 ± 0.03*
Size index	3.94 ± 0.03	4.14 ± 0.03*
Relative irregularity coefficient	20.43 ± 0.87	25.38 ± 0.92*
Area/phase	186.20 ± 5.60	204.84 ± 6.45*
MUPTs/contraction	3.4 ± 0.19	3.5 ± 0.18
Mean firing rate, Hz	18.0 ± 0.26	16.8 ± 0.28*
Number of CNMACRO units	288	322
CNMACRO duration, ms	12.69 ± 0.38	13.30 ± 0.54
CNMACRO amplitude, μV	42.60 ± 2.39	47.96 ± 2.56*
CNMACRO area, μV·ms	107.58 ± 5.37	112.05 ± 7.34
CNMACRO size index	4.5 ± 0.13	3.9 ± 0.10*

Definition of abbreviations: CNMACRO = concentric needle macro; MUPTs = motor unit potential trains; OSA = obstructive sleep apnea.

Values represent means ± SEM, unless otherwise specified.

^*P < 0.05.