Table 5-17Risk of DVT and pulmonary embolism by type of surgery, from the no prophylaxis arm of RCTs

Number of patients with an eventSample SizeIncidenceIncidence Lower 95% CLIncidence Upper 95% CL
DVT
Cardiac 41,345106514%7%24%
General5,13,53,65,88,89,97,112,171,230,238,239,279,289,371,372,385,405,423,498,499,528,550,552,553,560,590,593,594,625,641,643,653,703,711,716569228624%23%26%
Gynaecology30,73,113,114,117,414,530,633,644,68211369116%13%19%
Neurological90,101,441,607,646,647,649,6839144620%17%24%
Orthopaedic (Elective Hip)12,39,51,151,153,189,207,209,249,261,281,296,301,380,410,433,587,638,650,659,684,705530117245%42%48%
Orthopaedic (Hip fracture)74,176,185,209,248,268,312,316,370,381,385,463,464,470,533,613,631,704,710471113940%37%43%
Orthopaedic (Elective knee)291,388,436,443,697,6996510860%51%69%
Orthopaedic Mixed7,27,69,290,521,7006614047%39%55%
Urological119,266,267,386,6681814410%6%15%
Vascular615219
Mixed21,54,111,115,166,208,209,284,302,326,416,585,629286130322%19%24%
Not known93,337,360,364,71810227636%31%42%
All2353808929%
Symptomatic Pulmonary Embolism
Cardiac00
General5,238,280,372,373,405,499,517,552,6537230441%1%2%
Gynaecology113,114,11722501%0%3%
Neurological607,6490129
Orthopaedic (Elective Hip)12,51,261,281,296,410,433,587,612,638,650,684,705327603%2%5%
Orthopaedic (Hip fracture)74,176,178,185,381,463,464,470,533638118%6%10%
Orthopaedic (Elective Knee)697032
Orthopaedic Mixed27,6952313419%13%25%
Urological40,1192419%3%19%
Vascular615019
Mixed284,34477111%1%2%
Not known00
All17557233%

From: 5, Risk, risk reduction and harm

Cover of Venous Thromboembolism
Venous Thromboembolism: Reducing the Risk of Venous Thromboembolism (Deep Vein Thrombosis and Pulmonary Embolism) in Patients Admitted to Hospital.
NICE Clinical Guidelines, No. 92.
National Clinical Guideline Centre – Acute and Chronic Conditions (UK).
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