Table 5.

The distribution of sleep disturbances among patients with COPD based on 2007 GOLD classification

Items reporting ≥ 3 times per week	GOLD Stage 1	GOLD Stage2	GOLD Stage 3	GOLD Stage 4	P-value
	N (%)	N (%)	N (%)	N (%)
Wake up at night or early morning	29 (42.6 %)	66 (41.0 %)	43 (35.0 %)	14 (56.0 %)	0.240
Get up to use the bathroom	45 (66.2 %)	118 (73.3 %)	80 (65.0 %)	22 (88.0 %)	0.085
Cannot breathe comfortably	2 (2.9 %)	11 (6.8 %)	11 (8.9 %)	4 (16.0 %)	0.161
Cough or snore loudly	10 (14.7 %)	23 (14.3 %)	21 (17.1 %)	6 (24.0 %)	0.628
Feel too cold	0 (0.0 %)	4 (2.5 %)	2 (1.6 %)	0 (0.0 %)	0.508
Feel too hot	0 (0.0 %)	4 (2.5 %)	2 (1.6 %)	1 (4.0 %)	0.512
Bad dreams	9 (13.2 %)	21 (13.0 %)	13 (10.6 %)	2 (8.0 %)	0.829
Pain	3 (4.4 %)	8 (5.0 %)	7 (5.7 %)	2 (8.0 %)	0.910