The present study ran Randomised control trials in 3,800 villages.
To prove causation, scientists would need to conduct Randomised controlled trials.
The meta-analysis contained five Randomised trials with a total of 477 people.
Those Randomised to the control arm had their money returned
and were ineligible for rewards.
Level II:
evidence obtained from at least one properly designed Randomised controlled trial of appropriate size;
The double-blind, placebo-controlled, Randomised trial will be carried out on 2,000
adults who have been successfully treated(and cured) for TB.
Protocol for a Randomised controlled trial of a school based cognitive behaviour therapy(CBT)
intervention to prevent depression in high risk adolescents(PROMISE).
Only Randomised controlled trials can prove cause and effect,
because all confounding factors are evenly Randomised between the treatment and placebo groups.
However, no Randomised study has yet proved the value of PET in this setting and
therefore CT and MRI remain the diagnostic standards.
At that time, two large Randomised controlled trials reported that eicosapentaenoic acid
supplements(which contained EPA and docosahexaenoic acid(DHA)) significantly reduced fatal heart disease.
It is undergoing a phase 2 non Randomised test at the national level in Italy after showing
positive results in people with severe disease.
In 2014, a Randomised controlled trial discouraged the use of helmets,
but the same year a study reported 95% improvement in asymmetry with helmet therapy.
Update September 2013: A new Randomised, double-blind placebo-controlled trial has just reported that
neurofeedback therapy for children with ADHD was no more effective than placebo.
However, Randomised controlled trials,
which can control for lifestyle factors like eating habits, still find no negative effect on body weight when people eat nuts.
The gold standard for testing whether something is really doing what it's
claimed to be doing is a double-blinded, Randomised and placebo-controlled clinical trial, though.
These recommendations are based on published data from Randomised controlled trials(RCTs)
and meta-analyses, i.e. a collective evaluation of several RCTs to increase sample size(patient numbers).
As with many interventions intended to prevent ill health, the effectiveness of parachutes has not been subjected to rigorous evaluation by using Randomised controlled trials.
We tested the impact of these letters using a Randomised controlled trial-
randomly choosing students at some schools to get the letters, and others not to.
The results of 26 Randomised control trials(the gold standard of research trials),
which included 1,037 people who had either normal or high cholesterol levels, were added together.
The researchers reviewed 105 US-based Randomised controlled trials, from the past 50
years, that were relevant to pain patients in the United States and met inclusion criteria.
Before this study, the second-line treatment was the anti-convulsant drug
phenytoin, but until now this practice had never been scrutinised in a robust, major Randomised controlled trial.
Before this study, the second line treatment was the anti-convulsant drug
phenytoin, but until now this practice had never been scrutinised in a robust major Randomised controlled trial.
Consistent with this result, a study published last week Randomised 100 adults to either alternate-day fasting,
a continuous energy restriction diet, or to no intervention, for six months.
In a Randomised, double-blind, placebo-controlled trial,
scientists tested various combinations of the mosaic vaccine in people aged 18 to 50 who did not have HIV and were healthy.
N a Randomised, double-blind, placebo-controlled trial,
scientists tested various combinations of the mosaic vaccine in people aged 18 to 50 who did not have HIV and were healthy.
We think that everyone might benefit if the most radical protagonists of evidence-based medicine organised and
participated in a double blind, Randomised, placebo controlled, crossover trial of the parachute.
A recent Randomised controlled trial in 141 Irish mothers found learning to cook lasagna,
either by following recipe cards or by video increased their confidence and enjoyment of cooking.
A large Randomised controlled trial in Europe found that a higher
protein content of infant formula is associated with higher weight in the first two years of a child's life.
We think that everyone might benefit if the most radical protagonists of evidence based medicine organised and
participated in a double blind, Randomised, placebo controlled, crossover trial of the parachute.
Although Randomised controlled trials indicate that eating nuts
has an effect on blood flow(including to the brain), there isn't enough evidence to draw conclusions about their impact on cognitive function.