Sentences with phrase «relatively small number of studies»

However, the uncertainty in this estimate is necessarily large owing to the relatively small number of studies that have been performed and the considerable uncertainty in estimates, for example, of the nitrate τaer.

We have summarized the research on how well value - added measures hold up across years, subject areas, and student populations, but the evidence is based on a relatively small number of studies.

Not exact matches

«Central clearing will play a critical role in correcting long - standing flaws in market structure caused by overconcentration of exposures among a relatively small number of dealers,» according to the TABB Group study, which was commissioned by the World Federation of Exchanges.

It's really not that surprising that the difference between a one - to - three minute delay and immediate clamping was relatively small, especially considering the limited number of outcomes that the study focused upon.

Although the number of participants in the study was relatively small, the researchers report that it was sufficiently large to detect clinically relevant effects.

«While the number of cycles is relatively small, it is definitely growing,» said Georgia Tech's Aaron Levine, the associate professor in the School of Public Policy who led the study.

According to the study, countries with coastal borders — 192 in all — discharge plastic into the world's oceans with the largest quantities estimated to come from a relatively small number of middle - income, rapidly developing countries.

Guideline authors noted, however, that the evidence for the recommendations is weak, since many of the studies had relatively small numbers of patients with similar types of epilepsy and were conducted at only one institution, so the results may not be generalizable to everyone with epilepsy.

The researchers note that a limitation of the study is the relatively small number of people on which xenodiagnosis was attempted.

According to the study, the number of these deaths that can be attributed to changes in the climate since the industrial era is, however, relatively small.

The study revealed that in the model system chosen by Opitz and colleagues the winning side becomes apparent at a very early stage in the growth of the population, when the numbers of cells are still relatively small.

«A stable and healthy reef includes a high abundance and diversity of predatory fish and a relatively low number of herbivorous and small prey fish,» says study lead author April Boaden, a PhD student at the Coral CoE.

The study was the first randomized - controlled trial to examine the potential benefits of the low fat diet on the management of MS.. The study found no significant differences between the two groups in brain lesions detected on MRI brain scans or on other measures of MS.. But while the number of trial participants was relatively small, study leaders believe the significantly improved fatigue symptoms merited further and larger studies of the diet.

The numbers studied were also relatively small, and it wasn't possible to account for the potential effects of air pollution.

The studies were based on a relatively small number of participants, and a selection of genes.

The present study shows that Gächter's previous conclusion that punishment was detrimental «was an experimental artifact generated by a relatively small number of interactions,» says anthropologist Rob Boyd of the University of California, Los Angeles, who studies the mechanisms that shape human culture.

The authors caution that their study was conducted in a country with strong social welfare supports and that while the sample overall was large, the number of children with many symptoms of ADHD was relatively small.

However the use of relatively small numbers of donors in the context of many different bacteria being identified, affects the ability of the study to make definitive conclusions.

While there are trends in certain vaginal microbiota and increased risk in acquiring transient and persistent HPV infections, current studies are heterogenous in nature and describe relatively small numbers of cohorts with limited control groups.

The percentage of fixed differences in nature may be even lower given the relatively small number of individuals used in our study.

It is at present unknown whether an optimal balance between safety and efficacy can be achieved with the combination therapy of GH and IGF - I, since this combination has been evaluated in only a small number of patient populations and in studies of a relatively short duration.

The teacher in classroom 2 made up for the relatively small number of books for very beginning readers — a problem all teachers in the study faced — by creating many charts and individual little books.

Due to the population density of Maine and the relatively small number of places included in our study, there were only four municipalities with renters insurance rates higher than the state average.

Numerous think tanks have studied the implications of the $ 2.5 - billion - a-year promise and found that it would benefit a relatively small number of families that are already well - off.

In a study known as, «Big Bets,» it was found that domestic stock portfolios with strong weightings in a relatively small number of holdings delivered higher returns — both before and after expenses — than portfolios which held more uniformly weighted positions.

According to the recently released Art Museums by the Numbers 2016, a study compiled by the AAMD, there is a relatively small dependence on admissions fees alone at institutions compared to other sources of funding.

The study found that a small number of companies produce a relatively large amount of emissions, with three companies alone — American Electric Power, Southern Company and Tennessee Valley Authority — responsible for 24 percent of the industry's SO2 emissions, 21 percent of the NOx emissions, 19 percent of the CO2 emissions and 22 percent of the mercury emissions.

Algorithms based on a proportion of records reporting a person as indigenous require a greater weight of evidence than the algorithm used in this study, and would result in a relatively smaller increase in the number of deaths reported as a result of the enhancement.

In this study the number of deaths reported among Aboriginal and Torres Strait Islander peoples on the ABS death data is relatively small (n = 580), the chance of incorrect reporting of a non-Aboriginal or Torres Strait Islander person as Aboriginal or Torres Strait Islander is also likely to be small, and we suggest that this information be accepted as reported.

Relatively small numbers of cases in the moderately and very preterm groups does mean that the effects seen here should be treated with caution, although the results are consistent with the findings of other studies.16 — 18

In the overall WMHS analysis, exposure to multiple childhood adversities had a significant effect on the persistence of suicide when considering exposure to every additional childhood adversity; however, in the current study, it was not possible to stratify the number of adversities beyond two or more (ie, into more than two categories), given the relatively small number of cases in the sample overall with non-fatal suicidal behaviour.

This may be due to a large number of studies with relatively small study populations.

However, it has been indicated that using self - reported ethnicity is an adequate substitute for ancestry markers in European ancestry populations, especially in studies examining a relatively small number of SNPs such as the current study [64].