Effectiveness. In medicine, the ability of an intervention (for example, a drug or surgery) to produce the desired beneficial effect.

The measurement of a medicine's desired effect under ideal conditions, such as in a clinical trial.

The extent to which a drug is effective

1520s, from Latin efficacia "efficacy, efficiency," from efficax (genitive efficacis) "powerful, effectual, efficient," from stem of efficere "work out, accomplish" (see [..]

Broadly, efficacy refers to the capacity of a drug to produce an alteration in a target cell/organ after binding to its receptor. A competitive antagonist, that occupies a binding site without produci [..]

The maximum ability of a drug or treatment to produce a result regardless of the drug dose.

Capacity for producing the desired result or effect. A drug that cures a particular disease has efficacy for treating that disease and is efficacious.

How beneficial a test, treatment or public health intervention is under ideal conditions (for example, in a laboratory), compared with doing nothing or opting for another type of care.

A product's ability to produce beneficial effects on the duration or course of a disease. Efficacy is measured by evaluating the clinical and statistical results of clinical tests.

capacity or power to produce a desired effect; "concern about the safety and efficacy of the vaccine" (efficacious) marked by qualities giving the power to produce an intende [..]

n. The power to produce an intended effect as shown in the production of it.

The extent to which an intervention produces favorable outcomes under ideally controlled conditions

The ability of a product to perform the function for which it was designed. Enamel: The hard calcified tissue covering the dentin of the crown of the tooth.

Effectiveness

1.The competence of behavioural performance with reference to a person's perception of performance capabilities. 2. Pharmacology. Dealing with dose relationship.

The proven ability of a drug or vaccine to produce a desired clinical effect at the optimal dose.

Also called intrinsic activity. The extent to which a drug activates a response when it binds to a receptor. Receptor antagonist drugs have low efficacy; receptor agonists have high efficacy. See Figure 4.8.

How well something works in relation to predefined standards or expectations.

Efficacy is proof of a product’s effectiveness and is used in approving animal health products. Source: AHI

A measure of the benefit resulting from an intervention for a given health problem under the ideal conditions of an investigation.

(n) capacity or power to produce a desired effect

the ratio of the light output of a lamp (lumens) to its active power (watts), expressed as lumens per watt (LPW). As an example, an incandescent bulb may provide 1,700 lumens from a 100 watt light bul [..]

A metric used to compare light output to energy consumption. Efficacy is measured in lumens per watt. Efficacy is similar to efficiency but is expressed in dissimilar units. For example, if a 100-watt [..]

The amount of energy service or useful energy delivered per unit of energy input. Often used in reference to lighting systems, where the visible light output of a luminary is relative to power input; expressed in lumens per Watt; the higher the efficacy value, the higher the energy efficiency.

A measurement of efficiency used to compare light output to energy consumption. Efficacy is measured in lumens per watt (similar to miles/gallon for a motor vehicle). A 100-watt light source that produces 1750 lumens of light has an efficacy of 17.5 lumens per watt (L/W).

Efficacy is an industry term for the amount of light produced per watt of electricity (comparable to efficiency). It is the rate at which a light bulb is able to convert electrical power (watts) into [..]

Measurement of the efficiency of a light source. Extension (EXT.) –

Cognitive mechanism based on expectations or beliefs about one's ability to perform actions necessary to produce a given effect. It is also a theoretical component of Behavior change in various T [..]

Effectiveness of a drug or other medical intervention. Drugs are tested for efficacy to ensure they produce the desired effect on the disease or condition being treated.

Effectiveness. In medicine, the ability of an intervention (for example, a drug or surgery) to produce the desired beneficial effect.

in vaccine research, the ability of a vaccine to produce a desired clinical effect, such as protection against a specific infection or disease, at the optimal dosage and schedule in a given population [..]

in vaccine research, the ability of a vaccine to produce a desired clinical effect, such as protection against a specific infection, at the optimal dosage and schedule in a given population. A vaccine [..]

(Of a drug or treatment). The maximum ability of a drug or treatment to produce a result regardless of dosage. A drug passes efficacy trials if it is effective at the dose tested and against the illne [..]

the effectiveness of a vaccine, or how well a vaccine works.

is the power or capacity to produce a desired effect; effectiveness

The power or ability to produce an effect.

A relative concept referring to the ability of a medicine or treatment to achieve a beneficial clinical effect. This may be measured or evaluated using objective or subjective parameters.

An index of the potency of a drug or disease treatment. For an anthelmintic, usually estimated as the proportion of the worm burden in a host killed by a single dose or short-term course of the treatm [..]

effectiveness; ability to prevent, treat, diagnose, or otherwise manage a disease or other medical condition

 The ability of a drug to produce a beneficial effect

The ability of a drug or substance to produce a desired effect, such as treating a disease.

A term introduced by Stephenson (1956) to describe the way in which agonists vary in the response they produce even when they occupy the same number of receptors.

A term meaning how well or effectively a cosmetic device works.

The extent to which an intervention produces a beneficial result under ideal conditions. Clinical trials that assess efficacy are sometimes called explanatory trials and are restricted to participants who fully co-operate.

A measure of the benefit resulting from an intervention for a given health problem under the ideal conditions of an investigation; it answers the question, "Does the practice do more good than ha [..]

The ability of a drug to produce the intended effect as determined by scientific methods, for example in pre-clinical research conditions (opposite of hazard). See also absolute risk, reference risk, [..]

The ability of an intervention to achieve the desired results under ideal conditions. back to top

The benefits of a therapeutic intervention demonstrated by way of a comparison between one or more experimental treatments and one or more control or comparison treatments performed in the context of a highly controlled clinical trial. Efficacy studies must be designed so as to encourage replication. This typically implies at least four critical co [..]

The ratio of light output (in lumens) to input power (in watts), expressed as lumens per watt (LPW).

The ratio of the light output of a lamp (lumens) to its active power (watts), expressed as lumens per watt.

The ability of a treatment to achieve the desired results under ideal study conditions. Most clinical drug trials are performed under these conditions, in which ideal patients are selected to test a product’s ability to treat infection, for instance. The potential

A term meaning how well or effectively a cosmetic device works.

The ability of a drug to produce the purported effect, as determined by scientific methods.

Relative ability to produce a desired effect. The amount of energy service delivered per unit of energy input. [often used in reference to lighting systems - see luminous efficacy]

The extent to which a particular treatment produces the desired effect.

Effectiveness; the ability of a treatment to produce the desired result.

The power to produce an effect; in cancer research "efficacy" refers to whether the treatment is effective. Electrophoresis