Effectiveness

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Effectiveness

Effectiveness (/ɪˈfɛktɪvnəs/) is a term used in various fields, including medicine, psychology, and business, to denote the degree to which something is successful in producing a desired result.

Etymology

The term "effectiveness" originates from the Latin word "effectivus", which means "productive, effective". It was first used in the English language in the early 14th century.

In Medicine

In medicine, effectiveness refers to the ability of an intervention (such as a drug, medical device, or surgical procedure) to produce the desired beneficial effect in real-world conditions. This is different from efficacy, which refers to the ability to produce a beneficial effect under ideal conditions (usually in a controlled clinical trial).

For example, a drug may have high efficacy in clinical trials, but its effectiveness may be lower in the real world due to factors such as patient non-compliance, interactions with other drugs, or variations in patient characteristics.

Related Terms

  • Efficacy: The ability of an intervention to produce a beneficial effect under ideal conditions.
  • Efficiency: The ability to produce a desired result without wasting materials, time, or energy.
  • Potency: The amount of a drug or other substance required to produce an effect of given intensity.
  • Therapeutic index: The ratio of the dose of a drug that causes a harmful effect to the dose that causes a therapeutic effect.

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