Table 2:

Studies reporting country-specific data on obstructive sleep apnoea prevalence

	Sample size	Year	Age range, years	Men (%)	Scoring criteria	Nasal pressure	AHI ≥5 events per h		AHI ≥15 events per h
							Men	Women	Men	Women
Australia24	380	2008	40–65	73%	AASM 2012	Yes	25·5%	23·5%	4·7%	4·9%
Brazil25	1042	2010	20–80	45%	AASM 2007	Yes	46·5%	30·6%	24·8%	9·6%
China38	3648	2005	≥20	50%	Chicago 1999	Unspecified	24·2%	24·2%	9·5%	9·5%
Germany39	1208	2018	20–81	54%	AASM 2007	Yes	59·4%	33·2%	29·7%	13·2%
Hong Kong27	153	2001	30–60	100%	AASM 2007	No	8·8%	··	5·3%	··
Hong Kong28	106	2004	30–60	0%	AASM 2007	No	··	3·7%	··	1·9%
Iceland29	415	2016	40–65	··	AASM 2007	Yes	13·3%	10·8%	10·6%	4·8%
India30	365	2009	30–65	··	Chicago 1999	Yes	13·5%	6·1%	5·5%	6·1%
Japan32	322	2008	23–59	··	AASM 2012	Yes	59·7%	··	22·3%	··
New Zealand31	364	2009	30–59	··	AASM 2007	Yes	12·5%	3·4%	3·9%	0·2%
Norway33	518	2011	30–65	55%	AASM 2007	No	21·0%	13·0%	11·0%	6·0%
Poland34	676	2008	41–72	54%	AASM 2007	Yes	36·2%	18·4%	15·8%	7·6%
South Korea35	457	2004	40–69	69%	AASM 2007	No	27·1%	16·8%	10·1%	4·7%
Singapore36	242	2016	21–79	50%	AASM 2007	Yes	62·3%	62·3%	26·1%	26·1%
Singapore36	242	2016	21–79	50%	AASM 2012	Yes	70·8%	70·8%	30·5%	30·5%
Spain37	2148	2001	30–70	49%	AASM 2007	No	26·2%	28·0%	14·2%	7·0%
Switzerland23	2121	2015	40–85	48%	AASM 2012	Yes	83·8%	60·8%	49·7%	23·4%
USA26	1520	2013	30–70	55%	AASM 2007	Yes	33·9%	17·4%	13·0%	6·0%

Based on two different apnoea-hypopnoea index (AHI) cutoff values.