Sentences with phrase «cohort studies because»

It is currently not possible to conduct prospective cohort studies because fecal samples are not available.

Not exact matches

Fathers and father figures are more likely to be overlooked in studies than mothers, because childhood sweeps have not interviewed birth parents not living in the cohort member's «main household».

The study started as an RCT in 2006, but was changed into a prospective cohort study in 2007 because it was impossible to find women who would agree to be randomized for place of birth [12].

Other strengths of the underpinning cohort study include high participation by midwifery units and trusts in England; the minimisation of selection bias through achievement of a high response rate and absence of self selection bias because of non-consent; and the ability to compare groups that were similar in terms of identified clinical risk.12 The economic evaluation was conducted according to nationally agreed design and reporting guidelines.15 26 Collection of primary unit cost data was thorough and accounted for regional differences in care patterns.

Of the three most common indications in our study, failure to progress, nonreassuring FHR tracing, and fetal malpresentation, failure to progress is of particular interest because it strongly affected the cohort of primiparous women at term with a singleton gestation in cephalic presentation.

Parker adds that the different cancers are heterogeneous enough that the protective effect of alcohol might not apply to all of them, and that case - control and cohort studies are difficult to do because of the rarity of some types of kidney cancer.

Bedrosian notes that it was important that the study focused solely on women with Stage I disease in order to keep the study group homogenous and because in this cohort few would be ineligible for BCT.

«I'm really happy because we found the same result on [chromosome] 16 using a Canadian cohort,» adds Stephen Scherer, director of The Center for Applied Genomics at The Hospital for Sick Children in Toronto, a co-author on the second study.

«This study is unique because we have taken a cohort of children at high risk of developing type 1 diabetes and then followed what changes in the microbiome tip the balance toward progression to the disease,» Xavier said.

The difficulty in measuring such a small increment in chromosome 21 DNA concentration has recently been overcome with the use of massively parallel genomic sequencing.20 This technique can identify and quantify millions of DNA fragments in biological samples in a span of days.23 Three cohort studies have shown the feasibility of using the technique to identify fetuses with trisomy 21 by analysis of maternal plasma DNA.24 25 26 The sample numbers studied were small because, typically, only a few samples could be analysed in each sequencing run.

The vast majority of the individuals in the study (90.1 %) carried mtDNA haplogroups common to lineages of European descent, as expected because the cohort was > 96 % white [22].

And claiming that, because they are not considered paleo foods by your favourite gurus, it must mean grains and legumes are bad for us simply flies in the face of the evidence: «In summary, these data from 2 large prospective cohort studies consistently found significant inverse associations of whole grain intake and mortality, especially CVD mortality.

Cohort studies are preferred to controlled trials for diet and lifestyle studies because they allow researchers to gauge long - term trends instead of regimented treatment plans.

We focus on this three - year window (the exact dates of which vary according to the student's grade when enrolling in the study) because the most recent enrollment data available are for fall 2011 and the youngest cohort was expected to graduate high school in 2009.

Because the TIF program has continued to evolve since those early cohorts, the grantees studied in this report were responding to somewhat different (and generally more flexible) program requirements than later cohorts of grantees, such as those described in a separate study by the Institute for Education Sciences.

In this article on The Conversation, Professor Emily Banks, Scientific Director of the Sax Institute's 45 and Up Study, outlined why one of the most powerful weapons that doctors, public health departments and governments could use in their battle to decide which disease to help prevent next was the long - term population study or «longitudinal cohort study», because it can build up a comprehensive picture of health at a population level over Study, outlined why one of the most powerful weapons that doctors, public health departments and governments could use in their battle to decide which disease to help prevent next was the long - term population study or «longitudinal cohort study», because it can build up a comprehensive picture of health at a population level over study or «longitudinal cohort study», because it can build up a comprehensive picture of health at a population level over study», because it can build up a comprehensive picture of health at a population level over time.

Moreover, because this is a cohort study, results provide further information on the effect of pathological use of the Internet on adolescent mental health, particularly depression, not just an association between the two.

The adolescents initially excluded from the study cohort (n = 1012) because they had no participating parents were included in a sensitivity analysis of the relationship between SCL - 5 score and benefit receipt (n = 8509).

There is some evidence that children younger than nine months have negative consequences when their mothers work full time.9 In addition, there is some evidence from a six - city retrospective cohort study with cross-sectional surveys at urban medical centers, that terminating or reducing TANF benefits by sanctions, or decreasing benefits because of changes in income or expenses is associated with a greater probability that young children, under age three, will experience food insecurity and hospitalization.10

Although this possibility can not be ruled out, it does not seem probable because the teacher - rated hyperactivity factor score of this cohort was 2.11 (0.46)(on a scale of 0 to 3), which is somewhat higher than the Multimodal Treatment Study of Children with ADHD sample, which had a score of 1.82 (0.49)(no other longitudinal study reports teacher ratiStudy of Children with ADHD sample, which had a score of 1.82 (0.49)(no other longitudinal study reports teacher ratistudy reports teacher ratings).

Analyses using data from WLS are unweighted because (a) WLS relies on a simple random sample of respondents and does not include any oversamples and (b) WLS is a study describing the experiences of a cohort of individuals in the graduating class of 1957 and is not intended to be nationally representative.

Also, because our study treated age as time - invariant and contrasted middle - aged and older adults, our findings of a relative lack of age variations may indicate that little cohort difference exists in the significance of perceived spousal support in relation to health.