TABLE 3 Variables related to the short-term prognosis of acute coronary syndrome (ACS) in controls and obstructive sleep apnoea (OSA) patients

	Control	OSA	p-value
	AHI ⩽15 events·h⁻¹	AHI >15 events·h⁻¹	A	B	C
Subjects n	218	213
Length of stay in the CCU days	2.3±1.0	2.6±1.3	0.04	0.01	0.03
Length of hospitalisation days	6.5±3.7	6.8±3.8	0.4	0.55	0.68
CV complications during hospitalisation	14 (8.1)	16 (9.8)	0.73	0.59	0.67
Mortality during hospitalisation	0 (0)	1 (0.7)	0.29^#	^#	^#

Data are presented as mean±sd or n (%), unless otherwise stated. AHI: apnoea–hypopnoea index; CCU, coronary care unit; CV: cardiovascular. p-values, to evaluate differences between the groups, were calculated using: Mann–Whitney and Chi-squared tests as appropriate (A); linear and logistic regression models (B); and regression models adjusted by tobacco (current or former smoker versus nonsmoker), age, body mass index and hypertension (C). ^#: exact test based on the binomial distribution. Logistic regression models were not fit due to the lack of death cases. Statistically significant p-values are shown in bold.