Table 1

Inhospital venous thromboembolism, without thromboprophylaxis, in major orthopaedic surgery patients

Study	Patients (n)	Operation	Patients category	Deep vein thrombosis (%)	Pulmonary embolism (%)
Venographically assessed DVT
Salzman and Hirsh^* ¹	—	THR	not reported	50	1–6
Kelly^* ³	—	THR	RA	50	1
Abernethy^* ²	—	TKR	RA	70	2
Stringer⁵	55	THR	not reported	56	2
Clinically assessed DVT
White et al ⁷	8 859 721	THR THR	OA RA	1.2^† 0.3^†

DVT=deep venous thrombosis. THR=total hip replacement. RA=rheumatoid arthritis. TKR=total knee replacement. OA=osteoarthritis.^*Review. ^†Clinically apparent deep venous thrombosis and pulmonary embolism.