Table 1– Demographic data for patients with and without initial complex sleep apnoea (CompSA)

	CompSA	No CompSA	p-value
Subjects n	82	593
Age yrs	59.8±9.7	55.4±11.6	0.001*
BMI kg·m⁻²	31.8±5.3	32.3±5.8	0.516
ESS score	10.8±4.8	11.0±4.8	0.820
Males	86.6	86	0.880
Hypertension	70.7	59.6	0.053
Coronary artery disease	17.1	10.8	0.097
Congestive heart failure	1.2	1.2	1.000
Atrial fibrillation	6.1	6.3	0.957
Stroke	3.0	7.3	0.060
Opioids	1.2	1.0	0.598
Benzodiazepine	1.2	0.7	0.478
UPPP	0.0	0.5	1.000
Pacemaker	1.3	0.7	0.478

Data are presented as mean±sd or %, unless otherwise stated. BMI: body mass index; ESS: Epworth Sleepiness Scale; UPPP: uvulopalatopharyngoplasty. *: p<0.05, which was considered significant.