18 We updated the most recent meta-analysis by including studies published more recently and included only randomised controlled trials.
But writing in Nature earlier this year, he noted that the most recent meta-analysis showed "organic farming systems in developed countries produce yields that are 20% lower than their conventional counterparts".
Moreover, the most recent meta-analysis of trials involving more than 6,000 people from around the world, found that a reduction in salt intake of just 2mm a day reduced the risk of cardiovascular events by 20%.
The most recent meta-analysis, involving in excess of 64,000 patients, indicates that male sex engenders a 1.7-fold increase in mortality compared to female patients [8].
Furthermore, the most recent meta-analysis provided inconsistent results regarding inpatients (COPD with severe exacerbations) and outpatients with mild to moderate exacerbations [51].
In the most recent meta-analysis of the academic literature, Steblay et al. (2011) argued that this pattern is fairly typical of studies conducted since 1985 even when overall performance is better.
This limitation has been highlighted in the two most recent meta-analyses and has been proposed as one of the contributing reasons why clinical differences between CI and IB of beta-lactams have not been found.
The most recent meta-analysis appearing in Fertility and Sterility on acupuncture was reevaluated in view of the marked heterogeneity of interventions, controls, data analysis, and timing of interventions in the trials that were included.
"The most recent meta-analysis of fat consumption, cardiovascular disease and early mortality has not defined any clear association between saturated fat consumption and risk for heart disease or early death," he said.
Unfortunately, this most recent meta-analysis is also severely limited by numerous methodological problems.
