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Deep Vein Thrombosis: Diagnosis & Treatment Reginald E. Smith ...

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Does SYMPTOMATIC Calf DVT Require <strong>Treatment</strong> ?<br />

Calf DVT, treated initially with intravenous UFH<br />

then long term therapy OAC vs no treatment<br />

Recurrence during<br />

first 3 months<br />

Recurrence during<br />

first year<br />

OAC<br />

No Rx<br />

0 / 23 (0%) 1 / 23<br />

8 / 28 (28.5%) 9 / 28<br />

Recurrence 3 Months: <strong>Treatment</strong> vs No <strong>Treatment</strong> ARR=28.5% NNT= 3.5<br />

Lagerstedt Lancet 1985:2;515<br />

36

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