Sentences with phrase «for statistical studies»

Dr. Stan Young of the National Institute for Statistical Studies reports that «90 % of studies in epidemiology do not replicate... There is no supervision in the universities.»

The new method will be invaluable for statistical studies of large numbers of galaxies, says Laura Ferrarese of Rutgers University in Piscataway, New Jersey, co-discoverer of the velocity dispersion correlation.

Not exact matches

To get a handle on causality in the relation of organizational form with company performance, many studies use before / after comparisons and various statistical corrections for endogeneity of company form.

Using standard statistical methods, it was found that the average sales advantage for the ESOP firms in the study was $ 44,500, or an average of an 8.8 % sales per employee advantage over their non-ESOP counterparts in the same industry and of the same size; 2.)

Murray draws on those studies, but in Coming Apart, Fishtown, like Belmont, is shorthand for a statistical cohort: people with blue - collar or low - level office jobs and no academic degree more advanced than a high - school diploma.

The above studies do not exhaust the statistical research available for clarification of issues in religious broadcasting.

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The authors» responsibilities were as follows — CNM: had leadership responsibility for the research planning and execution, wrote the manuscript, and had primary responsibility for the final content of the manuscript; CNM, HE, and BN: formulated the study idea and designed the research; EV and JM: managed the day - to - day conduct of the study and oversaw the data collection; YJ: performed statistical analyses of the study data; and all authors: provided critical review and commentary on the draft of the manuscript and read and approved the final manuscript.

The result was that there was no statistical impact on the run, so the study concluded that «Omega 3 Chia loading appears a viable option for enhancing performance for endurance events lasting > 90 minutes and allows athletes to decrease their dietary intake of sugar while increasing their intake of Omega 3 fatty acids but offered no performance advantages.»

For our statistical simulations, we studied the percentage of time we fall below a peak by worse than -5 % and worse than — 10 %.

The strengths of the study include the ability to compare outcomes by the woman's planned place of birth at the start of care in labour, the high participation of midwifery units and trusts in England, the large sample size and statistical power to detect clinically important differences in adverse perinatal outcomes, the minimisation of selection bias through achievement of a high response rate and absence of self selection bias due to non-consent, the ability to compare groups that were similar in terms of identified clinical risk (according to current clinical guidelines) and to further increase the comparability of the groups by conducting an additional analysis restricted to women with no complicating conditions identified at the start of care in labour, and the ability to control for several important potential confounders.

(For an excellent analysis of the statistical limitations in this study see this UNICEF commentary on it.)

We thank John C. Pezzullo, PhD, and Dawn Misra, PhD, for their statistical support and thoughtful review of this manuscript, and Yvonne Bronner, SCD, for her contribution to the study design.

women allocated to midwife - led continuity models of care were more likely to be attended at birth by a known midwife (RR 7.04, 95 % CI 4.48 to 11.08; participants = 6917; studies = seven); however, the effect estimates for individual studies are highly variable, as reflected in substantial statistical heterogeneity (Tau ² = 0.31; I ² = 94 %; Analysis 1.15).

Studies had to be case control for the purpose of the statistical analysis; have breastfeeding as a measured exposure and leukemia as a measured outcome; include data on breastfeeding duration in months, including but not limited to, 6 months or more (where relevant data were unavailable in the publication, the authors of the studies were contacted); and been published in peer - reviewed journals with full text available in EStudies had to be case control for the purpose of the statistical analysis; have breastfeeding as a measured exposure and leukemia as a measured outcome; include data on breastfeeding duration in months, including but not limited to, 6 months or more (where relevant data were unavailable in the publication, the authors of the studies were contacted); and been published in peer - reviewed journals with full text available in Estudies were contacted); and been published in peer - reviewed journals with full text available in English.

You don't have to wade through statistical studies to get to the tips and tricks for choosing and using books with very small people.

This is consistent with other studies demonstrating a link between breastfeeding and maternal sensitivity.25, 26,27 For example, in a longitudinal study of more than 1300 families in the USA, mothers who breast fed were observed to be more sensitive to their babies at 6, 15, 24 and 36 months.27 Importantly, this difference persisted after statistical control for the effects of maternal mental health, the quality of the home environment in terms of infant health and stimulation and socioeconomic statFor example, in a longitudinal study of more than 1300 families in the USA, mothers who breast fed were observed to be more sensitive to their babies at 6, 15, 24 and 36 months.27 Importantly, this difference persisted after statistical control for the effects of maternal mental health, the quality of the home environment in terms of infant health and stimulation and socioeconomic statfor the effects of maternal mental health, the quality of the home environment in terms of infant health and stimulation and socioeconomic status.

Thus, for these studies there is a clear reliance on either matching or statistical adjustment for the effects of other factors correlated with feeding method that may also influence child outcomes such as maternal IQ and / or parenting style.

Another study of 2,900 Australian infants assessed at ages 1, 2 3, 5, 8, 10, and 14 years found that infants breastfed for 6 months or longer, had lower externalizing, internalizing, and total behaviour problem scores throughout childhood and into adolescence than never breastfed and infants fed for less than 6 months.8 These differences remained after statistical control for the presence of both biological parents in the home, low income and other factors associated with poor mental health.

In with respect to the quality of mother - infant relations, a prospective longitudinal study of around 1000 young New Zealanders found a small but significant association between breastfeeding duration and adolescents» perceptions of maternal care, with a longer duration of breastfeeding being associated with increased adolescent perceptions of maternal nurturance.9 This association persisted after statistical control for a wide range of the selection factors noted above.

The mean difference was unaffected by exclusion of one study with nearly one - half (45 %) of the statistical weight (31) or after adjustment for age, current SEP, BMI, smoking status, or all (Table 1).

Widely publicized attempts to replicate major findings have shown that study results that scientists and the public took for granted might be no more than a statistical fluke.

Their study combines engineering epidemiology and statistical - data analytics to develop predictive models for environmentally exposed applications.

While combining data from many studies improves statistical power, the researchers note that the associations between hormonal contraception and risk of becoming infected with HIV were attenuated for studies at lower risk of methodological bias compared to those at higher risk of bias, suggesting that some of the risk found to be associated with hormonal contraception may be due to bias in the original studies.

But not only should the results be interpreted with caution for various statistical reasons (stay tuned), some of the news coverage of both the Tour de France and nose bacteria studies has really stretched the interpretation of cause and effect.

But the evidence for an overall imbalance of the directions of cosmic rays in this new study is stronger, surpassing the so - called five sigma threshold for statistical significance, says Antonio Bueno, an astroparticle physicist at the University of Granada in Spain and co-spokesperson for the 500 - member Auger team.

In order to better understand how soil microbes respond to the changing atmosphere, the study's authors utilized statistical techniques that compare data to models and test for general patterns across studies.

In 2003 Pennebaker and statistician R. Sherlock Campbell, now at Yale University, used a statistical tool called latent semantic analysis (LSA) to study the diary entries of trauma patients from three earlier studies, looking for text characteristics that had changed in patients who were convalescing and met rarely with their physician.

The new approach contrasts with previous ways scientists analyzed and came to conclusions about sea level rise because it is «the only proper one that aims to fully account for uncertainty using statistical methods,» noted Parnell, principal investigator of the study conducted collaboratively with researchers at Tufts University, Rutgers University and Nanyang Technological University.

«Our finding from statistical analyses of all genes in the genome that SMCHD1 was the only plausible site of causal variants for arhinia — lack of a nose — was frankly shocking, since prior to our study no patients had ever been reported with both conditions.»

«Search for Earth - like planets: Try a statistical approach: Proposal touts value of broader, less detailed studies of exoplanets.»

Results of each statistical test should be reported in full with the value of the test statistic and p - value, and not simply reported as significant or non-significant; more than two significant digits on p - values are usually not needed except in situations of extreme multiple testing such as in genetic association studies where stringent corrections for multiple testing might be used.

By analyzing studies from after that time period as well as recent research relying on new statistical techniques for assessing the impact of legal changes, the pair found an emerging consensus that deregulating concealed carry restrictions increases violent crime.

In a recent study, Mathias Trachsel (Dept. of Biology, University of Bergen) and Atle Nesje (Dept. of Earth Science, University of Bergen and Uni Research Climate) used simple statistical models to assess and quantify the relative importance of summer temperature and winter precipitation for annual mass balances of eight Scandinavian glaciers.

But Jacob Taylor, a physicist at the National Institute of Standards and Technology in Gaithersburg, Maryland, says it provides experimental data for «a quiet revolution» in statistical physics, the study of how heat flows both in microscopic systems and on the scale of everyday life.

The researchers analyzed 37 unique studies of mobile health interventions, looking for statistical evidence of changes in health behavior or disease control in participants 18 years old or younger.

Together with colleagues Maren Rebke from Avitec Research and the Max Planck Institute for Demographic Research in Rostock, Germany and Peter H. Becker from the Institute of Avian Research «Vogelwarte Helgoland» in Wilhelmshaven, Germany, they have developed a statistical model to analyze the long - term study on common terns in Lake Bant in Wilhelmshaven led by Prof. Becker.

The working group headed by Professor Joerg Hasford of the Institute for Medical Information Processing, Biometrics and Epidemiology at LMU Munich is responsible for the methodology, data coordination and statistical evaluation of the Pre-POINT and Pre-POINTearly studies.

«In situations when smokers are drinking alcohol, it tends to trigger cravings for a cigarette,» explained Melissa J. Krauss, senior statistical data analyst at Washington University School of Medicine as well as corresponding author for the study.

Although several small studies have found similar results, this large study of almost 800,000 babies and mothers expands the evidence by using a statistical method that also accounts for unmeasured or unobserved factors.

For statistical reasons, Webber's study reported lifetime earnings only by major category — STEM, business, social sciences, and arts / humanities — and reported results only for mFor statistical reasons, Webber's study reported lifetime earnings only by major category — STEM, business, social sciences, and arts / humanities — and reported results only for mfor men.

A group from the NIH's National Institute of Allergy and Infectious Diseases (NIAID) evaluated the live imaging system as a potential alternative to traditional methods of assessing investigative influenza vaccines and treatment in mice, which can be time consuming and require more study animals for valid statistical comparison.

The researchers note one major limitation of their new study: Assessing trends was made tougher by the fact that roughly a third of the trials lacked sufficient statistical data for outsiders to confirm the significance of any symptoms of depression.

The University of Florence team's 2011 statistical analysis of health outcomes for almost 1,700 male patients showed that those involved in stable extramarital relationships had about twice the cardiovascular disease as other patients in the study, particularly if the man reported that his wife was still sexually interested in him.

In this study, researchers performed magnetic resonance imaging on 106 boys between the ages of 10 to 19 who were seeking treatment for Internet gaming disorder, a psychological condition that the Diagnostic and Statistical Manual of Mental Disorders (DSM - 5) says warrants further research.

The causes of such unpredictable results, Harris said, can include bad ingredients in the lab, including contaminated and misidentified cell lines; poor research design, including insufficient numbers of mice in animal studies; statistical error and overreach, including «HARKing» (hypothesizing after the results are known), a push beyond the limits of the data; and funding pressures, which can lead scientists to hype or exaggerate their results to remain competitive for additional grant money.

By using a statistical technique known as Bayesian analysis — which combines probability with archaeological information to improve precision for groups of radiocarbon dates — the study authors were able to produce a high - precision chronology model for early domestic horse use in Mongolia.

«Study shows cycling as number one cause of cervical fractures in men: Collaborative effort utilizing statistical analysis allowed for search of 50,000 patient cases in national database.»

Another research project fueled an ongoing debate about which statistical method is better for examining experimental data: Bayesian statistics, which incorporates early intuition, or the classical approach, which only takes a study's collected data into account.

The study has solid geographical sampling, and the team's statistical analysis of two DNA genomes — mitochondrial and nuclear — shows pretty good evidence for the new species, says Bryan Stuart, a curator of herpetology at the North Carolina Museum of Natural Sciences in Raleigh, who was not involved in the work.