Table 4. Multivariate analysis of determinants associated with sleep disturbances (PSQI>5) in bronchiectasis patients.

	Sleep disturbances (PSQI>5)
Determinants	OR	95% CI	P value†
Age	1.04	1.01–1.07	0.009
Increased 24-hour sputum volume (>30 ml)	2.01	1.22–3.33	0.006
Night cough symptom score	1.89	1.13–3.18	0.016
Depression (HADS-D≥8)	10.09	3.46–29.37	<0.001

^†In multivariate analysis, determinants with a P value ≤0.1 in preceding univariate analyses, including age, BMI, education, employment status, depression score, anxiety score, 24-hour sputum volume, daytime cough score, nighttime cough score, PA colonization, and MRC dyspnea score, were initially included, and were then eliminated using backward selection.