Table 4.

Predictors of limited overall study quality

Effect	“Limited” overall study quality (n = 22)	Univariate analysis
		Odds ratio	95% CI	p-value
Age > 65 years	12 (54.5%)	2.23	0.64–7.74	0.207
Male	16 (72.7%)	3.26	0.09–11.80	0.072
BMI > 30 (kg/m2)	14 (63.6%)	4.08	1.12–14.86	0.033*
Presence of ICD	17 (77.3%)	7.93	1.99–31.59	0.003*
Atrial fibrillation	8 (36.3%)	1.71	0.45–6.51	0.428
LVEF ≤ 35%	10 (45.5%)	7.50	1.39–40.43	0.019*
NYHA class > I	13 (59.1%)	3.37	0.94–12.12	0.063
Diuretics	13 (59.1%)	4.33	1.16–16.25	0.03*
OSA	5 (22.7%)	0.88	0.21–3.65	0.863

COPD was not included in the regression model because only one patient had COPD

(*) Statistically significant