double-blind study


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Related to double-blind study: single blind experiment, single blind study

dou·ble-blind stud·y

a study in which neither the patients, the experimenter, nor any other assessor of the results, knows which participants are subject to which procedure, thus helping to ensure any biases or expectations will not influence results.
See also: double-blind experiment.

double-blind study

A study in which neither the subject nor the investigator nor the research team interacting with the subject or data during the trial knows what treatment a subject is receiving (e.g., active or placebo).

dou·ble-blind stud·y

(dŭbĕl-blind stŭdē)
Study in which neither the patients, the experimenter, nor any other assessor of the results, knows which participants are subject to which procedure, thus helping to ensure that any biases or expectations will not influence results.
References in periodicals archive ?
The effects of short-term corticosteroid therapy on the symptoms of infectious mononucleosis pharyngotonsillitis: a double-blind study. J Am Coll Health Assoc.
In a randomized, double-blind study of 60 children aged 2-12 years (mean age 6 years), 29 received montelukast sodium and 31 received placebo.
One randomized, controlled, double-blind study of 39 patients with AOE found that a 2-week course of a topical aminoglycoside/steroid combination was no more effective than a steroid alone in alleviating symptoms.
Acupuncture, before being adopted into and studied by Western medicine, wasn't learned through double-blind study, was it?
In a six-week, double-blind study, about half the participants received five cups of black tea per day for three weeks, while the rest were given colored water that tasted like tea.
In one double-blind study from May of last year, the vitamin C group consistently contracted fewer colds than the placebo group.
Some consumers inevitably will experience gas or loose bowel movements after eating any product; that fact alone does not make those symptoms "side effects." You have to ask how many of the complaints cited by CSPI involved purely coincidental symptoms, especially when a placebo-controlled, double-blind study finds no gastrointestinal impact from eating olestra products.
In a placebo-controlled, double-blind study of 120 hypercholesterolemic individuals, Nutri Pharma's new ISP decreased serum cholesterol and LDL cholesterol significantly more than the control ISP.
Is the purpose of the clinical trial or double-blind study to confirm the efficacy of a new treatment or the safety of a new treatment known to be efficacious?
Not if you look at a large, three-month, double-blind study. Sixty women with hot flashes were given 90 mg of isoflavones from a soy beverage, and 60 women had a rice drink with none.
In a double-blind study, post-menopausal women with a history of more than 3 hot flashes per day were given either block cohosh (Klimadynona or Menofema, 40mg) or estrogen therapy (conjugated equine estrogen) for three months and compared with a placebo group.
In 1995 when stem cell research was given a cautious green light under the Clinton administration, Freed conducted a double-blind study in which 40 patients agreed to receive the transplants.