Sentences with phrase «observational studies do»

Comparisons based on iRF data are not very relevant since observational studies do not normally use iRF.

I presume that it is for the same reason that observational studies do not show (at least in Westernised countries) that saturated fat consumption is associated with heart disease.

Whether this has any meaningful effects in the long term is not known, although many observational studies do show that people who eat more fiber have a lower risk of heart disease (27).

Such observational studies don't establish cause and effect.

hello mr lowfat now lot's of expert's disagree with the lipid hypothesis coz when the expert's did studys to prove saturated fat causes heart disease they found there is no link between sat fats and disease not only that u have to look at the kind of study coz almost all observational studys don't prove anything coz they don't find a link but a clinical study actually is well controlled and does find a link i'm done

Correlations deduced from an observational study do not — in fact, can not — prove causation.

Please see Robert M's comment above for all the reasons why that observational study does not constitute evidence in favor of PA..

Not exact matches

Most of the health benefits researchers have found have been in observational studies, meaning we don't know that drinking coffee is responsible for the reductions in disease risk.

Besides randomized controlled clinical trials, there are a number of ways researchers can study how a particular cancer treatment is playing out in the real world: there are retrospective studies, observational studies, and even prospective research done using patient registries.

And yet the largest observational study — again we don't have controlled experiments — found that childhood swearing is largely innocuous.

This is an abstract of an observational study that can establish only association but does not prove causality; this is confirmed by the authors themselves in the press release when they state ``... so we can not say that low kilojoule beverage cause these problems... there may be other factors about people who drink more diet drinks that could explain the connection.»

The authors did point out that as their study was observational and so no firm conclusions can be drawn.

These were large scale, well done observational studies that were corrected as well as humanly possible for confounders.

I didn't see any evidence (1) actually connecting the former to the latter, (2) that the differences at birth are lasting, (3) that the purported diseases associated with the microbiome in adulthood are the same ones associated with c - section (the author cites obesity, but we know that those observational studies re: c - section and obesity are deeply flawed by confounding)(4) that the «microbiotic» benefit of vaginal birth exists regardless of maternal health and matenral microbiome.

Research is starting to address these issues by using different types of trials that do a better job simulating «real life», and these pragmatic trials look a lot like prospective observational studies.

Prospective observational and retrospective studies do not describe a greater prevalence of adverse maternal outcomes among women experiencing water immersion than those who do not.

More research needs to be done, they say, pointing out that this was not a controlled trial, only an observational study.

However, in contrast, the observational arm of this study (in which infants were not at high risk of developing atopic disease) did not demonstrate differences in the incidence of atopic dermatitis.

One observational study comparing induction to expectant management in women with a prior cesarean delivery found that induction of labor was associated with a greater relative risk of uterine rupture, whereas another study did not (104, 105).

Some barriers include the negative attitudes of women and their partners and family members, as well as health care professionals, toward breastfeeding, whereas the main reasons that women do not start or give up breastfeeding are reported to be poor family and social support, perceived milk insufficiency, breast problems, maternal or infant illness, and return to outside employment.2 Several strategies have been used to promote breastfeeding, such as setting standards for maternity services3, 4 (eg, the joint World Health Organization — United Nations Children's Fund [WHO - UNICEF] Baby Friendly Initiative), public education through media campaigns, and health professionals and peer - led initiatives to support individual mothers.5 — 9 Support from the infant's father through active participation in the breastfeeding decision, together with a positive attitude and knowledge about the benefits of breastfeeding, has been shown to have a strong influence on the initiation and duration of breastfeeding in observational studies, 2,10 but scientific evidence is not available as to whether training fathers to manage the most common lactation difficulties can enhance breastfeeding rates.

In addition, there was no effect on breastfeeding duration when the pacifier was introduced at 1 month of age.280 A more recent systematic review found that the highest level of evidence (ie, from clinical trials) does not support an adverse relationship between pacifier use and breastfeeding duration or exclusivity.281 The association between shortened duration of breastfeeding and pacifier use in observational studies likely reflects a number of complex factors such as breastfeeding difficulties or intent to wean.281 A large multicenter, randomized controlled trial of 1021 mothers who were highly motivated to breastfeed were assigned to 2 groups: mothers advised to offer a pacifier after 15 days and mothers advised not to offer a pacifier.

Although some SIDS experts and policy - makers endorse pacifier use recommendations that are similar to those of the AAP, 272,273 concerns about possible deleterious effects of pacifier use have prevented others from making a recommendation for pacifier use as a risk reduction strategy.274 Although several observational studies275, — , 277 have found a correlation between pacifiers and reduced breastfeeding duration, the results of well - designed randomized clinical trials indicated that pacifiers do not seem to cause shortened breastfeeding duration for term and preterm infants.278, 279 The authors of 1 study reported a small deleterious effect of early pacifier introduction (2 — 5 days after birth) on exclusive breastfeeding at 1 month of age and on overall breastfeeding duration (defined as any breastfeeding), but early pacifier use did not adversely affect exclusive breastfeeding duration.

Limitations to the current study included its observational nature, which doesn't prove cause and effect.

However, the studies the agency reviewed were almost all observational — meaning the researchers looked at rates of a given health problem among infants whose mothers chose to breastfeed and those whose mothers did not.

This is an observational study so no firm conclusions can be drawn about cause and effect, added to which the questionnaire captured dietary habits for one week only and it didn't include alcohol or coffee, which may have boosted calorie intake among the 18 - 19 year olds.

«Chimpanzees are ideal for this study because to collect this observational behavioral data, you don't need to collar them or use any invasive methods.

«In the case of pharmaceuticals, the onus is on the pharmaceutical company to do the research with toxicity testing, randomized control trials and post-exposure observational studies,» Conry said.

«This study is observational so it doesn't offer any proof about why the rates are going up.

The authors do note that this large study can not definitively prove cause and effect; nonetheless, the findings are strongly consistent with «a wealth of existing observational and clinical trial data to support health benefits of nut consumption on many chronic diseases.»

Observational studies, while sometimes contradictory, have suggested that arthritis sufferers do indeed benefit from using the supplements.

Like the other works, the latest study was observational and did not include baseline data on what health issues these patients might have had before they contracted Ebola.

Because the researchers conducted an observational study at a single site, their findings suggest but do not prove a cause - and - effect relationship between the Early Test program's methods and decreased incidence of HIV.

«Based on our observational study alone, we can not be certain why we saw the relationships we did.

This was an observational study, so it can increase our understanding of possible links between self - inflicted injury and suicide, but it doesn't show that one necessarily causes the other because other factors could be involved.

Even though this is an observational study, our findings do not support the hypothesis of adverse effects on child's language, communication and motor skills due to the use of mobile phone during pregnancy.»

The cross-sectional observational design of this study does not allow for conclusions about cause and effect.

But they point out that as this was an observational study no definitive conclusions can be drawn about cause and effect, especially as the findings might have been the result of reverse causation — whereby those with tendon injuries did less exercise, so raising their cholesterol levels.

The institute panel, however, discarded a raft of observational studies, in which researchers compare the health of populations who take vitamin D supplements with those who do not.

Though the concept of food addiction remains provocative, the findings suggest that more interventional and observational studies be done.

«The PURE study is observational in design and does not test directly whether reducing sodium intake in a population reduces cardiovascular disease outcomes compared to a comparable population, selected at random, that consumes moderate amounts of sodium.»

«Our observational study found that treating to low pressures doesn't provide any benefit to patients with regard to reducing risk of dangerous heart events like heart attack, heart failure and stroke.

The authors caution that the cross-sectional, observational nature of the study does not allow for conclusions about cause and effect.

For example, in his 1997 Quirks.com article called «Seven Rules for Observational Research: How to Watch People Do Stuff,» Walt Dickie describes his field studies: «I once spent a week watching people nod off waiting for their cars to be repaired.

A body of literature based on observational studies and secondary CHD prevention trials of short - acting CCBs has suggested that CCBs, especially DHP - CCBs, may increase the risk of cancer, gastrointestinal bleeding, and all - cause mortality.14, 36,37 The results of ALLHAT do not support these findings.

However, our observational study found subtle effects in estrogen - responsive tissues in soy - fed infants, and we don't know if these differences are associated with long - term health effects.»

No trials have been completed and few observational studies have been done comparing outcomes between cannabis users and nonusers.

The study was observational and did not evaluate causality.

The SAG15 study does not focus on any particular telescope architecture or observational method, but on the fundamental science questions.

Vemuri noted that the new study is only observational and as such does not prove that poor sleep causes an increase in beta - amyloid.

To answer it, they used data from five large observational studies and followed thousands of Americans ages 40 - 79 who didn't have cardiovascular disease.