Table 2. Reported VTE incidence in studies conducted over the past two decades.

Studies and Locations			Study period	Study design	Size of population	VTE	DVT	PE
Western countries
	Delluc et al.8	Western France	Mar 2013–Feb 2014	Prospective cohort	Among 367,911 inhabitants	157	119.8	64.2
	Bouée et al.9	France	2 years (2010–2011)	Population-based	Around 600,000 individuals	184
	Alotaibi et al.10	Alberta (Canada)	Apr 2002–Mar 2012	Population-based	Over 4 million in 2014	138	100	38
	Johansson et al.11	Västerbotten (Sweden)	2006	Population-based	204,836 residents	167	76.6	78.6
	Tagalakis et al.1	Que´bec (Canada)	2000–2009	Population-based	Over 74 million person-years	122	78	45
	Spencer et al.12	Worcester, MA (USA)	1999, 2001, and 2003	Population-based	477,800 residents in 2000	114	95	34
	Heit et al.13	Olmsted, MN (USA)	1981–2010	Population-based	493,000 individuals	123	47	62
	Lehnert et al.14	Denmark	2004–2014	Population-based	4,301,673 individuals			83
Asian countries
	Hwang et al.16 (2021)	Korea (this study)	2014–2018	Population-based	Around 52 million/year	50.7	23.1	27.7
	Hong et al.2	Korea (our previous)	2009–2013	Population-based	Around 50 million/year	23.4	9.4	14.1
	Jang et al.15	Korea (our previous)	2004–2008	Population-based	Around 49 million/year	13.8	5.31	7.0
	Sakuma et al.3	Japan	Aug–Sep 2006	Questionnaire	6,135 replies		11.6	6.2
	Molina et al.4 (2011)	Singapore	2006	Cohort (3 major hospital)	98,121 admitted patients	57		15
	Lee et al.5	Taiwan	2002	Population-based	Around 22.5 million/year	16.5		4.8
	Law et al.7	Hong Kong	2010–2011	Population-based	2,898,107 admissions	41.7	30.0	11.7
	Cheuk et al.6	Hong Kong	2000–2001	Retrospective	2,082,245 admissions	21	17.1	3.9

VTE = venous thromboembolism, DVT = deep vein thrombosis, PE = pulmonary embolism with or without DVT.