Sentences with phrase «because observational studies»

In my opinion, that's because the observational studies aren't properly in control.

Because observational studies may not fully control for dietary factors, exercise habits, and other variables, they can't prove whether the treatment is responsible for the health benefits.

Because observational studies look at groups of people and their behavior over time, it's hard to say for sure that other conflicting factors aren't influencing the outcomes they examine.

Not exact matches

Because of these challenges, the bulk of evidence for hydrotherapy during second stage comes from non-randomized studies, we call this observational research.

I said «good evidence» because there are indeed some studies suggesting that kids who consume more omega - 3s have better cognitive skills, but these are mostly observational or cross-sectional studies, which can be fraught with problems.

Because this was an observational study, it's not possible to draw any firm conclusions about the link between these factors, but the researchers believe there's something to this.

Because our study was a purely observational study, spitting up was defined as the presence of any visible regurgitation in the oropharynx of formula accompanied by evidence of increased respiratory effort (including coughing or sputtering) that was clinically worrisome to the caregiver.

Parikh stressed that because the study was observational, no definitive clinical recommendations could be drawn from these findings, nor any absolute proof that breast - feeding directly contributes to the decrease in cardiovascular risk factors.

Second, because almost all of the studies examining this association were observational, there was a possibility of confounding, particularly by familial and socioeconomic circumstances, which could not be taken into account with the published data available.

Because this is an observational study, researchers can not draw any causal links.

«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.

Because the study was observational, it's not possible to definitively link dietary patterns and bone health and fracture outcomes.

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.

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.

Observational studies are weaker than randomized ones because people who eat one way, rather than another, might have characteristics that benefit their heart health.

The authors point out that this is an observational study, so no firm conclusions can be drawn about cause and effect, and add their results might not apply to the general population because the study only looked at older patients.

Because this is an observational study, and one of the first to address this issue, inferences regarding whether this association is or is not causal can not yet be made.

The researchers note that because the study was observational and participants self - reported their food intake, they are unable to show that low - gluten diets directly increase the risk of diabetes.

Because the study was observational, it does not establish a direct cause - and - effect link between sugary drinks and prediabetes, McKeown said.

Because this was an observational study, the results need cautious interpretation, but nevertheless support a need for ongoing research of the potential mechanisms which underlie this connection.

Because antioxidants are widely used, and because there is laboratory and observational evidence of potential health benefits, antioxidants are the subject of extensive research across NIH, including recent NCCAM - sponsored studies that have been investiBecause antioxidants are widely used, and because there is laboratory and observational evidence of potential health benefits, antioxidants are the subject of extensive research across NIH, including recent NCCAM - sponsored studies that have been investibecause there is laboratory and observational evidence of potential health benefits, antioxidants are the subject of extensive research across NIH, including recent NCCAM - sponsored studies that have been investigating:

First, most of the evidence regarding the disease effects of carbohydrate to fat ratio is derived from epidemiological and observational studies because it is difficult to address disease endpoints through clinical trials.

These estimates are generally model - based because of difficulties in obtaining reliable internal variability estimates from the observational record on the spatial and temporal scales considered in detection studies.

Supported by the National Oceanic and Atmospheric Administration, the Department of Energy and the National Science Foundation, the Duke researchers noted that some observational studies predicted that the Earth's temperature could rise as much as 16 degrees in this century because of an increase in carbon dioxide or other so - called greenhouse gases.

Though many modeling studies have demonstrated the impact of deep water formation changes on the overturning circulation, the observational evidence for such a linkage has been hard to come by for two reasons: (1) Deep water formation is difficult to quantify because the time and locale of production are highly variable from winter to winter, and (2) overturning circulation measures require observations that span the basin, which have been limited in space and time.

The findings using iRF are largely irrelevant because iRF is little used in observational studies, which generally use ERF and / or RF values.

An observational study has found that eight out of 10 people who tried to sign up for the personally controlled e-health record failed in their attempt because the process was too difficult for users to navigate, Pulse + IT reports.

Many of the scales demonstrated weak psychometrics in at least one of the following ways: (a) lack of psychometric data [i.e., reliability and / or validity; e.g., HFQ, MASC, PBS, Social Adjustment Scale - Self - Report (SAS - SR) and all perceived self - esteem and self - concept scales], (b) items that fall on more than one subscale (e.g., CBCL - 1991 version), (c) low alpha coefficients (e.g., below.60) for some subscales, which calls into question the utility of using these subscales in research and clinical work (e.g., HFQ, MMPI - A, CBCL - 1991 version, BASC, PSPCSAYC), (d) high correlations between subscales (e.g., PANAS - C), (e) lack of clarity regarding clinically - relevant cut - off scores, yielding high false positive and false negative rates (e.g., CES - D, CDI) and an inability to distinguish between minor (i.e., subclinical) and major (i.e., clinical) «cases» of a disorder (e.g., depression; CDI, BDI), (f) lack of correspondence between items and DSM criteria (e.g., CBCL - 1991 version, CDI, BDI, CES - D, (g) a factor structure that lacks clarity across studies (e.g., PSPCSAYC, CASI; although the factor structure is often difficult to assess in studies of pediatric populations, given the small sample sizes), (h) low inter-rater reliability for interview and observational methods (e.g., CGAS), (i) low correlations between respondents such as child, parent, teacher [e.g., BASC, PSPCSAYC, CSI, FSSC - R, SCARED, Connors Ratings Scales - Revised (CRS - R)-RSB-, (j) the inclusion of somatic or physical symptom items on mental health subscales (e.g., CBCL), which is a problem when conducting studies of children with pediatric physical conditions because physical symptoms may be a feature of the condition rather than an indicator of a mental health problem, (k) high correlations with measures of social desirability, which is particularly problematic for the self - related rating scales and for child - report scales more generally, and (l) content validity problems (e.g., the RCMAS is a measure of anxiety, but contains items that tap mood, attention, peer interactions, and impulsivity).

Indeed, observational studies of mealtime suggest that effective affect management, interpersonal involvement, and communication in families relate to child health.27 In a focus - group study, some adolescents reported not having shared family meals together because of dissatisfaction with family relations.25 Other barriers to sharing family meals together include parent work schedules, difficulty in planning ahead, and dealing with picky eaters.28, 29 Health professionals are advised to tailor their recommendations on the basis of their knowledge about particular family situations.