Table 4– Prevalence of various comorbidities in patients with or without obstructive sleep apnoea (OSA), stratified for body mass index (BMI) according to World Health Organization criteria

	Normal weight, BMI <25 kg·m⁻²			Overweight, BMI 25–<30 kg·m⁻²			Obese, BMI ≥30 kg·m⁻²
	No OSA		OSA	No OSA		OSA	No OSA		OSA
Patients n	644			1583			2273
BMI kg·m⁻²	23±2			28±1			36±5
AHI events·h⁻¹	2±1	19±16		2±1	25±19		2±1	37±27
Prevalence systemic hypertension	11.8	27.9		21.8	38.1		30.6	58.5
Prevalence all CV disease	18.7	38.9		29.2	47.7		40.3	64.9
Prevalence all metabolic disease	11.3	20.9		22.6	28.9		32.5	43.6
Prevalence all pulmonary disease	8.9	14.3		14.6	13.5		20.0	18.5
Prevalence hypersomnia^#	34.9	39.0		41.1	43.1		43.3	49.3

Data are presented as mean±sd or %, unless otherwise stated. AHI: apnoea/hypopnoea index; CV: cardiovascular. ^#: defined by Epworth Sleepiness Scale score ≥10.