That's important, Huang said, because many studies often add extra investigators, resulting in better research findings.
A collective interpretation is difficult because many studies lack sufficient control and have unreasonably high baseline levels of oxidatively damaged DNA.
Scientific research on the connection between dieting and weight loss has given conflicting results, possibly because many studies rely on the potentially biased testimony of dieters themselves.
That's largely because many studies haven't sufficiently accounted for the fact that both gum disease and atherosclerosis occur more commonly among smokers, older people and people with diabetes, notes the paper.
However, the intrinsic mechanism of IME remains unclear because many studies have yielded various results depending on the promoter, reporter gene, flanking sequences of the intron, and target cell or tissue.
One factor, of course, could be the caffeine, but that can be hard to sort out from the research because many studies do not distinguish whether the coffee is caffeinated or decaffeinated.
There were many patients 75 years of age or older in the trial which is great, because many studies exclude older people but none of these elderly study volunteers lived in nursing homes or assisted-living facilities.
Other critics pointed out that the Anthropocene would create problems with scholarship, because many studies in the scientific literature that examined Holocene environments and strata would need to be reclassified as having examined Anthropocene ones.
The upward trend in the number of uninsured needs to be reversed because many studies have shown that people who lack health insurance tend to forgo needed care until they become much sicker and go to expensive emergency rooms for treatment.
Despite these promising outcomes, little consensus exists as to whether 1 treatment is more efficacious than others, in part because cross-study differences in methodology render meta-analyses difficult, and in part because many studies fail to document duration of treatment effects or generalization to daily activities.
Because many studies have documented the health benefits of eating rice, especially brown rice, Mr. Schultz said, "We were thinking, if this was really causing problems in the population, wouldn't it have shown up in data somewhere before this?" Dismissing the new information, however, was not consistent with the business's culture or the family's belief system.
