Table 2

Average correlation coefficients (r²) from regression relationships between cough phase durations and EMG amplitudes during repetitive TB coughs.

Simple linear regression coefficients for cough phase or EMG magnitude (r² ± SE)

CT_I

CT_E1

CT_E2

I Amp

E Amp

CT_I

X

0.03 ± 0.01

0.09 ± 0.02

0.08 ± 0.03

0.05 ± 0.01

CT_E1

X

X

0.09 ± 0.03

0.04 ± 0.01

0.1 ± 0.03

CT_E2

X

X

X

0.07 ± 0.02

0.12 ± 0.02

I Amp

X

X

X

X

0.29 ± 0.05

There were only weak correlations between individual phase durations and a moderate relationship between inspiratory and expiratory EMG amplitudes during coughing.

Wang et al. Cough 2009 5:12   doi:10.1186/1745-9974-5-12