Risk and odds ratios 1/7: Patients immobilized for a substantial amount of time can develop deep vein thrombosis (DVT), a blood clot in a leg or pelvis vein. DVT can have serious adverse health effects and can be difficult to diagnose. On its website, drug manufacturer Pfizer reports the outcome of a study looking at the effectiveness of the drug Fragmin (dalteparin) in preventing DVT in immobilized patients. Of the 1518 randomly chosen immobilized patients given Fragmin, 42 experienced a complication from DVT. Of the 1473 randomly chosen immobilized patients given a placebo, 73 experienced a complication from DVT. A) Compute the odds of experiencing DVT complications for immobilized patients treated with a placebo. (Enter the number with 4 decimal places.) B) Compute the relative risk of patients experiencing DVT complications for immobilized patients treated with a placebo (numerator) vs. those treated with Fragmin (denominator). (Enter the number with 2 decimal places.) C) Compute the odds ratio of patients experiencing DVT complications for immobilized patients treated with a placebo (numerator) vs. those treated with Fragmin (denominator). (Enter the number with 2 decimal places.)
Risk and odds ratios 1/7: Patients immobilized for a substantial amount of time can develop deep vein thrombosis (DVT), a blood clot in a leg or pelvis vein. DVT can have serious adverse health effects and can be difficult to diagnose. On its website, drug manufacturer Pfizer reports the outcome of a study looking at the effectiveness of the drug Fragmin (dalteparin) in preventing DVT in immobilized patients. Of the 1518 randomly chosen immobilized patients given Fragmin, 42 experienced a complication from DVT. Of the 1473 randomly chosen immobilized patients given a placebo, 73 experienced a complication from DVT.
A) Compute the odds of experiencing DVT complications for immobilized patients treated with a placebo. (Enter the number with 4 decimal places.)
B) Compute the relative risk of patients experiencing DVT complications for immobilized patients treated with a placebo (numerator) vs. those treated with Fragmin (denominator). (Enter the number with 2 decimal places.)
C) Compute the odds ratio of patients experiencing DVT complications for immobilized patients treated with a placebo (numerator) vs. those treated with Fragmin (denominator). (Enter the number with 2 decimal places.)
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