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Table 6 The distribution of sleep disturbances among patients with COPD based on 2011 GOLD classification

From: Factors responsible for poor sleep quality in patients with chronic obstructive pulmonary disease

Items reporting ≥ 3 times per week GOLD group A GOLD group B GOLD group C GOLD group D P-value
N (%) N (%) N (%) N (%)
Wake up at night or early morning 15 (25.0 %) 70 (46.7 %) 10 (29.4 %) 57 (42.9 %) 0.015
Get up to use the bathroom 37 (61.7 %) 114 (76.0 %) 19 (55.9 %) 95 (71.4 %) 0.047
Cannot breathe comfortably 0 (0.0 %) 11 (7.3 %) 2 (5.9 %) 15 (11.3 %) 0.050
Cough or snore loudly 8 (13.3 %) 21 (14.0 %) 4 (11.8 %) 27 (20.3 %) 0.383
Feel too cold 0 (0.0 %) 4 (2.7 %) 0 (0.0 %) 2 (1.5 %) 0.452
Feel too hot 0 (0.0 %) 4 (2.7 %) 0 (0.0 %) 3 (2.3 %) 0.487
Bad dreams 4 (6.7 %) 26 (17.3 %) 1 (2.9 %) 14 (10.5 %) 0.035
Pain 1 (1.7 %) 9 (6.0 %) 2 (5.9 %) 8 (6.0 %) 0.597