Table 6 Variables related to acute coronary syndrome severity in controls and obstructive sleep apnoea (OSA) patients, considering an optimal threshold for the responses

	Univariate model		Adjusted model
	OR (95% CI)	p-value	p-value
Ejection fraction <51.5%
Control	1
OSA	2.05 (1.24–3.43)	0.005	0.04
Killip classification >I
Control	1
OSA	2.31 (1.04–5.53)	0.046	0.17
⩾3 diseased vessels
Control	1
OSA	1.96 (1.21–3.21)	0.007	0.06
Peak troponin ⩾724.5 ng·mL⁻¹
Control	1
OSA	2.59 (1.53–4.46)	<0.001	0.02

The Gini criterion was used to determine an optimal threshold to discriminate between OSA and control patients for each variable. The odds ratio (OR) and the corresponding 95% confidence interval (CI) and p-values estimated from logistic regression models. p-values from the logistic regression models adjusted for tobacco (current or former smoker versus nonsmoker), age, body mass index and hypertension are also provided. Only significant variables identified in table 2 were considered. Statistically significant p-values are shown in bold.