Table 1.

Characteristics of included studies

Reference	Surgical category*	No. of patients	Age (years)†	Female (%)	Malignancy (%)	Duration of hospital stay (days)†	No. of VTE events	Recruitment years
Agnelli et al.43	Mixed	2373	64	46	100	10	92	n.r.
Kwon et al.31	General	4195	61	54	39	8	47	2005–2009
Merkow et al.42	Mixed	44 656	n.r.	65	100	4‡	719	2006–2008
Davenport et al.28	General	21 943	66	49	100	7‡	446	2005–2009
Shah et al.36	Mixed	471 867	54	41	20	4‡	7078	2005–2010
Tzeng et al.38	General	7621	60‡	52	85	6‡	210	2005–2010
Tzeng et al.39	General	13 771	64‡	52	82	8‡	427	2005–2010
Lavallée et al.32	Urological	2303	68	21	100	8‡	123	2006–2012
VanDlac et al.40	Urological	1307	69‡	24	100	8‡	78	2005–2011
Gross et al.41	General	37 076	66	48	100	10	1018	2005–2010
Moghadamyeghaneh et al.44	General	116 029	62	52	n.r.	6	4556	2005–2011
Kester et al.45	Orthopaedic	23 620	NR	61	0	3‡	366	2008–2010
Martin et al.33	General	3208	64‡	n.r.	100	11‡	161	2005–2012
Moghadamyeghaneh et al.35	General	219 477	61	52	61	6	2278	2005–2013
Spaniolas et al.37	General	71 694	45‡	79	0	n.r.	283	2006–2011
Jordan et al.30	Urological	13 208	61	42	n.r.	4‡	160	2006–2012
McAlpine et al.34	Urological	65 100	n.r.	n.r.	85	n.r.	956	2006–2014
Benlice et al.48	General	24 182	43	49	0	8	614	2005–2016
Herforth et al.29	Mixed	503 602	n.r.	51	n.r.	n.r.	3912	2016
Sager et al.46	Orthopaedic	39 825	59	42	0	n.r.	102	2005–2017
Merhe et al.49	Urological	36 753	62	0	100	2‡	423	2008–2015
Kumar et al.47	General	141 065	57	57	n.r.	1‡	878	2011–2017
Total		1 864 875					24 927

Details available in supplementary material (Tables S2 and S4). †Mean values are shown, except ‡median. VTE, venous thromboembolism; n.r., not reported.