double-blind trial

double-blind trial

A test of the real effect of a new medical treatment, in which neither the patient nor the persons conducting the trial know which of two identical-seeming treatments is genuine and which is not. Trials not conducted in this way cannot be relied on to provide reliable evidence of the efficacy of a treatment because of the power of the placebo effect and of psychological suggestion.
References in periodicals archive ?
In a double-blind trial, testers saw improvements in skin moisture, elasticity AND wrinkles after eating a daily 7g bar for three weeks.
The company enrolled 115 patients in the placebo-controlled, randomised, double-blind trial, which assessed the efficacy and safety of three separate, twice-daily, dosing regimens of Prurisol, 50 milligram (mg) (50mg QD), 100mg (50mg BD), and 200mg (100mg BD).
The REMIT (Responses of Mental Stress Induced Myocardial Ischemia to Escitalopram Treatment) study, a randomized, double-blind trial of patients with stable coronary heart disease and mental stress-induced myocardial ischemia (MSIMI, decreased blood flow to the heart) was designed to examine the effect of the antidepressant escitalopram (Lexapro) on heart health.
In this randomized, double-blind trial involving 60 patients with severe, active rheumatoid arthritis, a decrease in the number of swollen joints and tender joints occurred in subjects fed chicken type II collagen for 3 months but not in those that received a placebo.
London, Ontario Canada, was a randomized, placebo-controlled, double-blind trial in which 84 healthy postmenopausal women were enrolled and given either geniVida or a placebo.
INVESTIGATORS, looking into earlier findings that suggested a connection between antioxidants, thiazolidinedione (TZD) medications, and improvements in nonalcoholic steatohepatitis (NASH), conducted a multicenter double-blind trial enrolling 247 nondiabetic patients.
The study (American Journal of Clinical Nutrition, March 2007) consisted of a double-blind trial of zinc supplementation in 50 subjects ages 55 to 87.
5 years while on azathioprine, according to a randomized, double-blind trial.
The 3-month, double-blind trial was funded partially by a research grant from Eli Lilly & Co.
Dick Menzies, director of the Respiratory Epidemiology Unit at Canada's McGill University, led a team of researchers in a double-blind trial of 771 participants working in three Montreal office buildings.
2 g EPA) for eight weeks in a multi-center, randomized, double-blind trial.
According to results of a randomized, double-blind trial among 4,071 women in 10 developed and developing countries who sought emergency contraception within five days of unprotected coitus, (1) there was no significant difference in pregnancy rates by emergency contraceptive method.