Sentences with phrase «for potential selection biases»

The use of these models allows researchers to control for potential selection biases of the Fellowship's rigorous entrance requirements, as well as other potential sources of bias.

As discussed above, these variables are used to account for the potential selection bias introduced because of the differences between the populations at choice schools compared to traditional public schools.

Not exact matches

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.

These studies are at risk for selection bias both of cases and of control individuals and their results might be influenced by potential confounders such as other health behaviors that may be independently associated both with breastfeeding and childhood leukemia risk, although this is of course not limited to case - control studies.

Although we could not find estimates of fan use in the US population, we examined the potential selection bias by evaluating characteristics associated with SIDS risks in study participants and nonparticipants in a previously published article.16 Using California birth certificate data, we compared the ORs for maternal age, maternal education, parity, birth weight, infant sex, and late initiation of prenatal care (> 5 months» gestation).

There was also the potential for negative selection bias, because MD Anderson tends to treat patients with fewer than four central nervous system lesions with a stereotactic approach.

In order to avoid a potential bias caused by selection of a particular referent subject, subject - specific SI maps from all the subjects are summarized as a weighted average, with the Jaccard index for each subject as the weight.

These results raise questions about treating on - line venues (or even on - line dating sites) as a homogeneous lot and also underscore the potential for selection bias and the importance of addressing it.

Importantly, our null effect estimates from the random experiment differ substantially from those found from an analysis of CPS data, raising concerns about the potential for selection bias in non-experimental estimates of returns.

In this analysis, I attempt to control for a variety of potential selection biases.

Since FastWeb is a free scholarship matching service, there is the potential for selection bias (i.e., students who are looking for scholarships).

In view of the compelling US and global evidence that both sensible and nonsensical strategies outperform for the same reasons (value and small - cap biases), the authors conclude that potential investors would do well to base strategy selections largely on a comparison of explicit and implicit implementation costs due to portfolio turnover.

A selection of potential defendants is beneficial because it opens up the opportunity to select a venue with fewer biases against or other inconveniences for your client.

Also, we used objective approaches to quantify neighbourhood attributes that allowed us to partially control for potential reverse causality due to depressed individuals tending to exhibit negative cognitive bias resulting in negative thoughts and perceptions.65 Residential self - selection bias is likely to be a trivial source of reverse causality in this study because Hong Kong's high levels of population density (6760 people / km2) and low percentage of developed land (less than 25 %) 66 limit most residents» choice of accommodation and 37 % of Hong Kong older adults live in public rental housing.67 Given the satisfactory response rate and the level of similarity in depressive symptoms and sociodemographic characteristics of participants recruited from two types of recruitment centres, the findings from this study are likely to be generalisable to the population of Chinese Hong Kong older adults matching the study eligibility criteria and other populations of older adults living in similar ultra-dense metropolises of Southeast Asia.

Although this study has some shortcomings such as small sample size, potential selection bias, and less than ideal controls (eg, treatment group was seen for a longer period than control group), the results are promising and consistent with data from previous studies in non-medical patients with depression.

Selection bias is also a potential problem for most studies of child care as it may confound variations in child and family characteristics with variations in child care contexts.

This study aims: (a) to examine whether poverty predicts changes in behavior problems between 1.5 and 8 years of age; (b) to estimate potential selection bias for the observed associations.

A randomized controlled trial comparing I - PCIT to both a control group and standard PCIT would provide further confidence in these findings and would be important to address a potential self - selection bias for parents choosing an intensive treatment.