Researchers analysed 14 studies involving 4,055 cases of VTE.
Travel was associated with a 2.8-fold overall increase in VTE risk and an 18 per cent higher risk for each two-hour increase in duration.
Absolute risk, equivalent to one case in 4,600 airline flights, is too low to recommend 'high risk' interventions such as oral anticoagulation for healthy people, the researchers said.
However, the efficacy of other interventions, such as increased hydration and walking, should be examined for healthy travellers and other interventions could be considered for those at high risk, they argue.
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