TABLE 3.

KEY RESULTS FROM 31 SUBJECTS

Subject Characteristic	Control	OSA
Number of units	700	955
Duration, ms	10.3 ± 0.1	11.5 ± 0.1*
Amplitude, μV	382.5 ± 10.0	397.5 ± 9.0
Area, μV·ms	514.6 ± 13.3	589.7 ± 12.2*
Phases	2.8 ± 0.03	3.0 ± 0.03*
Turns	3.6 ± 0.06	3.8 ± 0.05*
Area-to-amplitude ratio	1.4 ± 0.02	1.6 ± 0.02*
Size index	3.9 ± 0.02	4.1 ± 0.02*
Relative irregularity coefficient	19.4 ± 0.7	25.9 ± 0.7*
Area/phase, μV·ms	182.9 ± 4.6	203.1 ± 4.3*
MUPTs/contraction	3.1 ± 0.1	3.5 ± 0.1*
Mean firing rate, Hz	17.0 ± 0.2	17.7 ± 0.2
Number of CNMACRO units	446	668
CNMACRO duration, ms	13.0 ± 0.3	14.9 ± 0.3*
CNMACRO amplitude, μV	42.9 ± 2.0	57.6 ± 2.1*
CNMACRO area, μV·ms	106.2 ± 4.4	143.6 ± 5.2*
CNMACRO size index	4.3 ± 0.1	4.3 ± 0.1

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.