Sentences with phrase «likely selection bias»

I suspect the issue is less sample size, and more likely selection bias.

Not exact matches

Other healthcare claims database studies have been conducted looking at joint replacement in morbidly obese patients, but results have been inconsistent, most likely due to selection bias.

Observational studies have a high risk of bias owing to problems such as self - selection of interventions (people who believe in the benefits of meditation or who have prior experience with meditation are more likely to enroll in a meditation program and report that they benefited from one) and use of outcome measures that can be easily biased by participants» beliefs in the benefits of meditation.

By comparing the educational outcomes of students who scored just above the admissions threshold (and thus were very likely to attend) and just below the admissions threshold (who mostly did not attend), Dougherty is able to account for the selection bias that has plagued prior CTE research.

Also, because the assignment to the FTC is not random, the more positive effects they see for students participating for more years may, as they acknowledge, reflect selection bias; that is, any student who stays in the same school for more years is likely to have better outcomes.

This method allows us to address two sources of bias: (i) differences in the types of schools that Asian Americans and whites are likely to attend (e.g., school quality, course difficulty, socio - demographic composition of student body) and (ii) self - selection of Asian Americans into school districts.

If differences in follow - up rates are small, selection bias from differential attrition is also likely to be modest.

, b) plays a role, but only within the 10 % stretch band, c) matters, but one can always find a portfolio's worth of low absolute valuation stuff (if one doesn't worry about the implied adverse selection bias that when everything else is pricey, the cheap stuff is much more likely to be cheap for a good reason), or d) something else?

This difference is likely attributable to a selection of bias in terms of which animals are listed on Petfinder, and the fact that certain animals are removed from the website by shelters for reasons that are often unknown to Petfinder (perhaps because they were euthanized).

With fewer ships, drawn from a small selection of countries, any biases (in SST, or NMAT, or cloud cover) are likely to be more pronounced at that time.

From their description I don't think there is a bias in their sample of scientists, though there is always the possibility of self - selection, where people might be more likely to respond to a survey if it originates from a source who they perceive to be credible.

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.

The relatively high prevalence of sports club membership in the sample suggests self - selection bias, with the more active girls more likely to participate in the study.

The quasi-experimental design reduces spillover effects and makes it easier to implement the program, but does not eliminate the possibility of selection bias.35, 36 The use of prospectively defined controls at quasi-experimental sites likely contributed to minimized discrepancies in outcomes between randomization and quasi-experimental groups.37 For several parenting outcomes, such as discipline practices, findings were of similar magnitude and direction at randomization and quasi-experimental sites, but statistically significant at only quasi-experimental sites, where the sample size was larger; they were significant in the pooled sample, as well.

Ten studies were rated as moderate on selection bias with the study sample considered to be at least somewhat likely to be representative of the target populations.