Assignment task:
Venous thromboembolism (VTE) is the formation of a blood clot in a vein which affects adults of all ages and ethnicities. Clots occurring in the deep veins are called deep vein thrombosis (DVT), and those occurring in the lung and heart circulation are known as pulmonary embolism. Immobility is now considered a proposed risk factor for VTE, as it can promote stasis in blood flow, and has secondary complications such as muscle weakness and atrophy. A cohort study showed that low physical activity is one of the risk factors for mortality after a thromboembolic event.
Research Question: Does early ambulation prevent deep vein thrombosis (DVT) for post-op patients?
Null Hypothesis: There is no reduction in deep vein thrombosis (DVT) with early ambulation after surgery.
Alternative Hypothesis: Early ambulation after surgery decreases the incidence of developing DVT.
Type I Error: If the data suggested early ambulation was protective against DVT, it was not. That would lead to the null hypothesis being rejected although it is not false.
Type II error: This would exist if the data showed no decrease in the risk of DVT with early ambulation, but early ambulation does reduce the risk of DVT. That means we have failed to reject the null hypothesis.
One or Two Tail: This will be one-tailed because the hypothesis states that early ambulation would lower risk of DVT, not any effect can play a part in the rise of DVT.
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