Description of nighttime cough epochs in patients with stable COPD GOLD II–IV

Figures & data

Table 1 Demographics, baseline characteristics, and lung function of the dataset

	COPD II (n=10)	COPD III (n=10)	COPD IV (n=10)
Age (years)	65.8±7.2	67.6±4.6	63.8±8.6
BMI (kg/m^2)	26.9±6.4	26.6±5.8	23.3±4.6
Pack-years	50.5±11.9	45.4±21.6	37.0±19.9
Male to female ratio	5:5	6:4	5:5
Severity according	A (n=5)	C (n=6)	C (n=7)
to A/B/C/D	B (n=5)	D (n=4)	D (n=3)
FEV1 (%)	60.8±7.3	44.0±8.7	30.6±9.9

Note: Data presented as mean ± standard deviation unless stated otherwise.

Abbreviation: BMI, body mass index.

Figure 1 LEOSound recorder with connected trachea microphone (left) and two lung microphones (right).

Figure 2 Distribution of productive and normal cough epochs grouped by COPD stage.

Figure 3 (A–C) Distribution of productive (blue) and normal (gray) cough epochs for all patients grouped by their COPD stage.

Note: *Denotes smokers (n=11).

Figure 4 Distribution of cough length, grouped by COPD stage.

Figure 5 Distribution of the number of coughs in a cough epoch, grouped by COPD stage.

Figure 6 Distribution of productive and nonproductive cough in smokers (n=11) and nonsmokers (n=19).