Table 2.

Prevalence of obstructive sleep apnoea in interstitial lung disease populations n (%)

Ref.	Population	Prevalence of OSA	M/F	Age (mean)	BMI (mean)	Comment
Aydoğdu et al[18], 2006	ILD	24 (65)				Abstract only
Mermigkis et al[17], 2007	IPF	11 (61)	12/6	68.1	33.2	Retrospective study; subjects with symptoms of SDB
Lancaster et al[19], 2009	IPF	44 (88)	34/16	65.7	32.2	Prospective study of unselected patients; 16 subjects used oxygen during PSG
Mermigkis et al[20], 2010	IPF	20 (59)	21/13	65.0	27.3	Prospective study of subjects with newly diagnosed IPF
Kolilekas et al[2], 2013	IPF	28 (90)	24/7	68.0	28.7	Increased AHI associated with decreased survival, after exclusion of those prescribed CPAP
Pihtili et al[25], 2013	ILD	34 (68)	14/36	53.9	25.9	Prospective study; excluded obese subjects (BMI ≥ 30)
	IPF	14 (82)
	Sarcoidosis	10 (67)
	Scleroderma	10 (56)

OSA: Obstructive sleep apnoea; BMI: Body mass index; ILD: Interstitial lung disease; IPF: Idiopathic pulmonary fibrosis; SDB: Sleep disordered breathing; PSG: Polysomnography; AHI: Apnoea hypopnoea index; CPAP: Continuous positive airway pressure.